java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/array2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:19:14,423 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:19:14,424 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:19:14,435 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:19:14,436 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:19:14,437 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:19:14,438 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:19:14,440 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:19:14,442 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:19:14,442 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:19:14,443 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 12:19:14,444 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 12:19:14,444 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 12:19:14,445 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 12:19:14,446 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 12:19:14,447 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 12:19:14,448 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 12:19:14,450 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 12:19:14,452 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 12:19:14,454 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 12:19:14,455 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 12:19:14,456 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 12:19:14,459 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 12:19:14,468 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-04 12:19:14,490 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:19:14,490 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:19:14,492 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:19:14,492 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:19:14,493 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:19:14,494 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:19:14,494 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:19:14,494 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:19:14,494 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:19:14,494 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:19:14,495 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:19:14,495 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:19:14,495 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:19:14,495 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:19:14,495 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:19:14,496 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:19:14,496 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:19:14,497 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:19:14,497 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:19:14,497 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:19:14,497 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:19:14,497 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:19:14,498 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:19:14,498 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:19:14,498 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:19:14,498 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:19:14,499 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:19:14,499 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:19:14,499 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:19:14,499 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:19:14,565 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:19:14,576 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:19:14,581 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:19:14,583 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:19:14,584 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:19:14,584 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array2.i_3.bpl [2018-10-04 12:19:14,585 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array2.i_3.bpl' [2018-10-04 12:19:14,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:19:14,645 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:19:14,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:19:14,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:19:14,647 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:19:14,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:19:14" (1/1) ... [2018-10-04 12:19:14,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:19:14" (1/1) ... [2018-10-04 12:19:14,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:19:14,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:19:14,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:19:14,694 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:19:14,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:19:14" (1/1) ... [2018-10-04 12:19:14,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:19:14" (1/1) ... [2018-10-04 12:19:14,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:19:14" (1/1) ... [2018-10-04 12:19:14,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:19:14" (1/1) ... [2018-10-04 12:19:14,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:19:14" (1/1) ... [2018-10-04 12:19:14,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:19:14" (1/1) ... [2018-10-04 12:19:14,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:19:14" (1/1) ... [2018-10-04 12:19:14,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:19:14,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:19:14,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:19:14,721 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:19:14,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:19:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:19:14,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:19:14,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:19:15,043 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:19:15,043 INFO L202 PluginConnector]: Adding new model array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:19:15 BoogieIcfgContainer [2018-10-04 12:19:15,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:19:15,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:19:15,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:19:15,049 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:19:15,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:19:14" (1/2) ... [2018-10-04 12:19:15,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38972d25 and model type array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:19:15, skipping insertion in model container [2018-10-04 12:19:15,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:19:15" (2/2) ... [2018-10-04 12:19:15,053 INFO L112 eAbstractionObserver]: Analyzing ICFG array2.i_3.bpl [2018-10-04 12:19:15,063 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:19:15,074 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:19:15,126 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:19:15,126 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:19:15,126 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:19:15,127 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:19:15,127 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:19:15,127 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:19:15,127 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:19:15,127 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:19:15,128 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:19:15,141 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 12:19:15,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:19:15,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:15,149 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 12:19:15,150 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:15,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:15,156 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 12:19:15,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:15,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:15,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:15,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:15,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:15,308 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:19:15,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:19:15,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:19:15,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:19:15,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:19:15,330 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 12:19:15,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:15,379 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 12:19:15,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:19:15,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 12:19:15,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:15,392 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:19:15,392 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 12:19:15,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:19:15,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 12:19:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 12:19:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:19:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 12:19:15,433 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-04 12:19:15,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:15,434 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 12:19:15,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:19:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 12:19:15,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:19:15,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:15,435 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 12:19:15,435 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:15,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:15,436 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-04 12:19:15,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:15,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:15,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:15,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:15,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:15,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:15,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:15,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:15,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:15,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:15,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 12:19:15,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:19:15,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:19:15,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:19:15,677 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-04 12:19:15,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:15,732 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 12:19:15,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:19:15,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 12:19:15,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:15,734 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:19:15,734 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:19:15,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:19:15,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:19:15,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:19:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:19:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 12:19:15,739 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-04 12:19:15,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:15,739 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 12:19:15,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:19:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 12:19:15,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:19:15,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:15,740 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-04 12:19:15,741 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:15,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:15,741 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-04 12:19:15,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:15,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:15,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:15,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:15,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:15,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:15,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:15,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:19:15,903 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:19:15,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:15,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:15,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:15,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:19:15,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:19:15,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:19:15,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:19:15,935 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-04 12:19:15,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:15,960 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 12:19:15,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:19:15,960 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 12:19:15,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:15,961 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:19:15,961 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:19:15,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:19:15,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:19:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:19:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:19:15,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 12:19:15,966 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-04 12:19:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:15,966 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 12:19:15,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:19:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 12:19:15,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:19:15,967 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:15,967 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-04 12:19:15,968 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:15,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:15,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-04 12:19:15,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:15,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:15,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:15,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:15,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:16,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:16,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:16,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:19:16,106 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 12:19:16,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:16,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:16,137 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:16,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:19:16,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:19:16,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:19:16,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:19:16,138 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-04 12:19:16,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:16,226 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 12:19:16,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:19:16,227 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 12:19:16,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:16,227 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:19:16,227 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:19:16,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:19:16,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:19:16,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:19:16,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:19:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 12:19:16,232 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-04 12:19:16,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:16,232 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 12:19:16,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:19:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 12:19:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:19:16,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:16,234 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-04 12:19:16,234 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:16,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:16,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-04 12:19:16,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:16,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:16,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:16,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:16,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:16,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:16,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:16,615 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:19:16,634 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:19:16,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:16,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:16,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:16,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:19:16,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:19:16,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:19:16,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:19:16,676 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-04 12:19:16,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:16,728 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 12:19:16,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:19:16,729 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 12:19:16,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:16,730 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:19:16,733 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:19:16,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:19:16,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:19:16,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:19:16,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:19:16,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 12:19:16,739 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-04 12:19:16,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:16,739 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 12:19:16,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:19:16,740 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 12:19:16,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:19:16,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:16,741 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-04 12:19:16,741 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:16,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:16,742 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-04 12:19:16,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:16,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:16,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:16,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:16,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:16,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:16,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:16,894 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:19:16,976 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 12:19:16,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:16,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:17,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:17,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:19:17,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:19:17,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:19:17,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:19:17,016 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-04 12:19:17,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:17,064 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 12:19:17,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:19:17,065 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 12:19:17,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:17,066 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:19:17,066 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:19:17,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:19:17,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:19:17,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:19:17,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:19:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 12:19:17,071 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-04 12:19:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:17,071 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 12:19:17,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:19:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 12:19:17,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:19:17,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:17,073 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-04 12:19:17,073 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:17,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:17,073 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-04 12:19:17,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:17,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:17,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:17,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:17,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:17,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:17,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:17,254 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:19:17,282 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:19:17,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:17,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:17,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:17,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:19:17,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:19:17,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:19:17,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:19:17,317 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-04 12:19:17,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:17,355 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 12:19:17,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:19:17,357 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 12:19:17,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:17,358 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:19:17,358 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:19:17,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:19:17,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:19:17,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:19:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:19:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 12:19:17,363 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-04 12:19:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:17,363 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 12:19:17,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:19:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 12:19:17,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:19:17,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:17,364 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-04 12:19:17,365 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:17,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:17,365 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-04 12:19:17,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:17,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:17,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:17,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:17,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:17,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:17,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:17,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:17,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:17,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:17,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:19:17,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:19:17,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:19:17,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:19:17,900 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-04 12:19:17,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:17,954 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 12:19:17,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:19:17,955 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 12:19:17,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:17,956 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:19:17,956 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:19:17,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:19:17,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:19:17,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:19:17,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:19:17,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 12:19:17,961 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-04 12:19:17,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:17,961 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 12:19:17,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:19:17,961 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 12:19:17,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:19:17,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:17,962 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-04 12:19:17,962 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:17,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:17,963 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-04 12:19:17,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:17,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:17,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:17,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:17,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:18,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:18,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:18,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:19:18,149 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:19:18,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:18,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:18,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:18,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:19:18,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:19:18,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:19:18,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:19:18,191 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-04 12:19:18,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:18,257 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 12:19:18,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:19:18,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 12:19:18,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:18,259 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:19:18,259 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:19:18,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:19:18,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:19:18,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:19:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:19:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 12:19:18,264 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-04 12:19:18,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:18,264 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 12:19:18,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:19:18,265 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 12:19:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:19:18,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:18,266 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-04 12:19:18,266 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:18,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:18,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-04 12:19:18,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:18,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:18,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:18,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:18,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:18,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:18,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:18,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:19:18,620 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 12:19:18,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:18,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:18,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:18,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:19:18,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:19:18,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:19:18,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:19:18,656 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-04 12:19:18,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:18,716 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 12:19:18,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:19:18,717 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 12:19:18,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:18,718 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:19:18,718 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:19:18,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:19:18,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:19:18,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:19:18,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:19:18,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 12:19:18,724 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-04 12:19:18,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:18,725 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 12:19:18,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:19:18,725 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 12:19:18,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:19:18,725 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:18,726 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-04 12:19:18,726 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:18,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:18,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-04 12:19:18,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:18,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:18,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:18,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:18,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:18,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:18,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:18,999 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:19:19,026 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:19:19,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:19,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:19,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:19,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:19:19,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:19:19,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:19:19,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:19:19,065 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-04 12:19:19,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:19,112 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 12:19:19,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:19:19,113 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 12:19:19,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:19,113 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:19:19,114 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:19:19,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:19:19,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:19:19,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 12:19:19,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:19:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 12:19:19,120 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-04 12:19:19,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:19,120 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 12:19:19,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:19:19,120 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 12:19:19,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:19:19,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:19,121 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-04 12:19:19,122 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:19,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:19,122 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-04 12:19:19,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:19,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:19,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:19,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:19,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:19,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:19,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:19,348 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:19:19,398 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 12:19:19,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:19,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:19,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:19,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:19:19,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:19:19,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:19:19,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:19:19,433 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-04 12:19:19,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:19,622 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 12:19:19,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:19:19,625 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 12:19:19,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:19,626 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:19:19,626 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:19:19,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:19:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:19:19,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:19:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:19:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 12:19:19,635 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-04 12:19:19,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:19,635 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 12:19:19,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:19:19,635 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 12:19:19,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:19:19,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:19,636 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-04 12:19:19,637 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:19,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:19,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-04 12:19:19,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:19,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:19,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:19,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:19,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:19,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:19,917 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) [2018-10-04 12:19:19,932 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:19,990 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:19:19,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:19,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:20,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:20,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:19:20,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:19:20,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:19:20,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:19:20,029 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-04 12:19:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:20,079 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 12:19:20,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:19:20,079 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 12:19:20,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:20,080 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:19:20,080 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:19:20,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:19:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:19:20,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:19:20,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:19:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 12:19:20,087 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-04 12:19:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:20,088 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 12:19:20,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:19:20,088 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 12:19:20,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:19:20,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:20,090 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-04 12:19:20,091 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:20,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:20,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-04 12:19:20,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:20,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:20,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:20,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:20,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:20,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:20,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:20,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:20,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:20,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:20,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:19:20,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:19:20,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:19:20,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:19:20,487 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-04 12:19:20,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:20,713 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 12:19:20,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:19:20,714 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 12:19:20,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:20,715 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:19:20,715 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:19:20,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:19:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:19:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 12:19:20,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:19:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 12:19:20,720 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-04 12:19:20,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:20,721 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 12:19:20,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:19:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 12:19:20,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:19:20,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:20,722 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-04 12:19:20,722 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:20,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:20,723 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-04 12:19:20,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:20,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:20,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:20,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:20,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:20,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:20,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:20,951 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:19:20,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:19:20,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:20,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:21,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:21,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:19:21,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:19:21,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:19:21,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:19:21,017 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-04 12:19:21,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:21,058 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 12:19:21,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:19:21,059 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 12:19:21,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:21,059 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:19:21,060 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:19:21,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:19:21,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:19:21,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 12:19:21,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:19:21,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 12:19:21,066 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-04 12:19:21,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:21,066 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 12:19:21,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:19:21,066 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 12:19:21,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:19:21,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:21,067 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-04 12:19:21,067 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:21,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:21,067 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-04 12:19:21,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:21,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:21,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:21,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:21,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:21,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:21,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:21,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:19:21,340 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 12:19:21,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:21,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:21,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:21,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:19:21,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:19:21,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:19:21,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:19:21,409 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-04 12:19:21,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:21,584 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 12:19:21,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:19:21,586 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 12:19:21,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:21,586 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:19:21,587 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:19:21,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:19:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:19:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:19:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:19:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 12:19:21,592 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-04 12:19:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:21,592 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 12:19:21,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:19:21,592 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 12:19:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:19:21,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:21,593 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-04 12:19:21,593 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:21,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:21,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-04 12:19:21,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:21,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:21,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:21,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:21,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:21,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:21,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:21,970 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:19:21,988 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:19:21,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:21,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:22,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:22,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:19:22,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:19:22,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:19:22,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:19:22,028 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-04 12:19:22,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:22,113 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 12:19:22,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:19:22,113 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 12:19:22,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:22,114 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:19:22,114 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:19:22,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:19:22,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:19:22,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 12:19:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:19:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 12:19:22,120 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-04 12:19:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:22,120 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 12:19:22,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:19:22,120 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 12:19:22,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:19:22,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:22,121 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-04 12:19:22,121 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:22,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:22,122 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-04 12:19:22,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:22,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:22,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:22,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:22,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:22,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:22,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:22,781 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:19:22,871 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 12:19:22,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:22,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:22,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:22,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:19:22,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:19:22,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:19:22,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:19:22,915 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-04 12:19:23,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:23,033 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 12:19:23,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:19:23,034 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 12:19:23,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:23,035 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:19:23,035 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:19:23,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:19:23,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:19:23,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:19:23,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:19:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 12:19:23,042 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-04 12:19:23,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:23,042 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 12:19:23,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:19:23,044 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 12:19:23,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:19:23,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:23,045 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-04 12:19:23,045 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:23,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:23,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-04 12:19:23,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:23,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:23,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:23,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:23,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:23,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:23,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:23,934 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:19:23,985 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:19:23,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:23,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:24,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:24,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 12:19:24,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:19:24,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:19:24,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:19:24,021 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-10-04 12:19:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:24,120 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 12:19:24,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:19:24,121 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-04 12:19:24,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:24,122 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:19:24,122 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:19:24,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:19:24,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:19:24,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 12:19:24,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:19:24,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 12:19:24,126 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-10-04 12:19:24,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:24,126 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 12:19:24,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:19:24,126 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 12:19:24,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:19:24,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:24,127 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-04 12:19:24,127 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:24,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:24,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-10-04 12:19:24,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:24,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:24,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:24,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:24,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:24,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:24,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:25,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:25,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:25,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:25,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:19:25,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:19:25,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:19:25,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:19:25,074 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-10-04 12:19:25,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:25,211 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 12:19:25,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:19:25,212 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-04 12:19:25,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:25,212 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:19:25,212 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 12:19:25,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:19:25,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 12:19:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 12:19:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:19:25,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 12:19:25,219 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-10-04 12:19:25,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:25,219 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 12:19:25,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:19:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 12:19:25,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:19:25,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:25,220 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-10-04 12:19:25,220 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:25,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:25,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-10-04 12:19:25,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:25,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:25,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:25,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:25,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:25,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:25,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:25,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:19:25,547 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:19:25,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:25,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:25,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:25,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:19:25,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:19:25,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:19:25,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:19:25,581 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-10-04 12:19:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:25,640 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 12:19:25,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:19:25,641 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-04 12:19:25,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:25,642 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:19:25,642 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:19:25,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:19:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:19:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:19:25,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:19:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 12:19:25,647 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-10-04 12:19:25,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:25,648 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 12:19:25,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:19:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 12:19:25,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:19:25,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:25,649 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-04 12:19:25,649 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:25,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:25,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-10-04 12:19:25,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:25,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:25,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:25,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:25,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:26,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:26,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:26,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:19:26,092 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 12:19:26,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:26,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:26,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:26,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:19:26,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:19:26,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:19:26,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:19:26,137 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-10-04 12:19:26,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:26,337 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 12:19:26,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:19:26,339 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-04 12:19:26,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:26,339 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:19:26,339 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 12:19:26,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:19:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 12:19:26,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 12:19:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 12:19:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 12:19:26,345 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-10-04 12:19:26,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:26,345 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 12:19:26,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:19:26,345 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 12:19:26,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:19:26,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:26,346 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-10-04 12:19:26,346 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:26,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:26,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-10-04 12:19:26,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:26,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:26,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:26,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:26,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:26,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:26,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:26,798 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:19:26,824 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:19:26,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:26,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:26,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:26,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 12:19:26,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:19:26,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:19:26,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:19:26,866 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-10-04 12:19:26,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:26,925 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 12:19:26,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:19:26,926 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-04 12:19:26,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:26,927 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:19:26,927 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:19:26,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:19:26,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:19:26,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 12:19:26,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:19:26,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 12:19:26,932 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-10-04 12:19:26,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:26,933 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 12:19:26,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:19:26,933 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 12:19:26,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:19:26,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:26,934 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-04 12:19:26,934 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:26,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:26,934 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-10-04 12:19:26,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:26,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:26,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:26,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:26,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:28,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:28,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:28,191 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:19:28,287 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 12:19:28,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:28,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:28,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:28,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:19:28,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:19:28,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:19:28,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:19:28,335 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-10-04 12:19:28,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:28,540 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 12:19:28,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:19:28,541 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-04 12:19:28,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:28,541 INFO L225 Difference]: With dead ends: 55 [2018-10-04 12:19:28,542 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:19:28,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:19:28,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:19:28,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 12:19:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 12:19:28,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 12:19:28,547 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-10-04 12:19:28,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:28,547 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 12:19:28,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:19:28,547 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 12:19:28,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:19:28,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:28,548 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-10-04 12:19:28,548 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:28,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:28,548 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-10-04 12:19:28,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:28,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:28,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:28,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:28,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:29,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:29,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:29,363 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:19:29,437 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 12:19:29,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:29,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:29,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:29,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 12:19:29,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:19:29,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:19:29,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:19:29,482 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-10-04 12:19:29,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:29,556 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 12:19:29,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:19:29,556 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-04 12:19:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:29,557 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:19:29,557 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:19:29,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:19:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:19:29,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 12:19:29,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:19:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 12:19:29,564 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-10-04 12:19:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:29,564 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 12:19:29,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:19:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 12:19:29,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:19:29,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:29,565 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-10-04 12:19:29,565 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:29,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:29,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-10-04 12:19:29,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:29,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:29,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:29,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:29,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:30,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:30,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:30,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:30,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:30,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:30,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:19:30,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:19:30,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:19:30,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:19:30,310 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-10-04 12:19:30,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:30,376 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 12:19:30,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:19:30,376 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-04 12:19:30,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:30,377 INFO L225 Difference]: With dead ends: 59 [2018-10-04 12:19:30,377 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 12:19:30,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:19:30,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 12:19:30,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 12:19:30,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 12:19:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 12:19:30,382 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-10-04 12:19:30,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:30,382 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 12:19:30,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:19:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 12:19:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:19:30,383 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:30,383 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-10-04 12:19:30,383 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:30,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:30,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-10-04 12:19:30,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:30,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:30,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:30,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:30,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:31,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:31,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:31,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:19:31,396 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:19:31,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:31,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:31,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:31,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:19:31,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:19:31,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:19:31,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:19:31,434 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-10-04 12:19:31,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:31,487 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 12:19:31,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:19:31,487 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-04 12:19:31,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:31,488 INFO L225 Difference]: With dead ends: 61 [2018-10-04 12:19:31,488 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:19:31,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:19:31,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:19:31,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 12:19:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:19:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 12:19:31,492 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-10-04 12:19:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:31,493 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 12:19:31,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:19:31,493 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 12:19:31,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:19:31,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:31,494 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-10-04 12:19:31,494 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:31,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:31,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-10-04 12:19:31,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:31,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:31,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:31,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:31,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:31,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:31,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:31,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:19:32,000 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 12:19:32,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:32,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:32,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:32,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:19:32,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:19:32,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:19:32,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:19:32,047 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-10-04 12:19:32,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:32,114 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 12:19:32,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:19:32,114 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-04 12:19:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:32,115 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:19:32,115 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:19:32,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:19:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:19:32,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 12:19:32,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 12:19:32,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 12:19:32,119 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-10-04 12:19:32,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:32,120 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 12:19:32,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:19:32,120 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 12:19:32,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 12:19:32,120 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:32,121 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-10-04 12:19:32,121 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:32,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:32,121 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-10-04 12:19:32,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:32,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:32,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:32,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:32,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:33,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:33,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:33,190 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:19:33,221 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:19:33,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:33,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:33,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:33,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:19:33,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:19:33,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:19:33,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:19:33,258 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-10-04 12:19:33,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:33,389 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 12:19:33,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:19:33,390 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-04 12:19:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:33,391 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:19:33,391 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:19:33,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:19:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:19:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 12:19:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:19:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 12:19:33,396 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-10-04 12:19:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:33,396 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 12:19:33,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:19:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 12:19:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:19:33,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:33,397 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-10-04 12:19:33,397 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:33,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:33,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-10-04 12:19:33,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:33,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:33,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:33,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:33,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:34,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:34,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:34,038 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:19:34,216 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 12:19:34,216 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:34,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:34,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:34,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:19:34,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:19:34,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:19:34,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:19:34,252 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-10-04 12:19:34,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:34,332 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 12:19:34,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:19:34,332 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-04 12:19:34,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:34,333 INFO L225 Difference]: With dead ends: 67 [2018-10-04 12:19:34,333 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:19:34,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:19:34,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:19:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 12:19:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 12:19:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 12:19:34,338 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-10-04 12:19:34,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:34,338 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 12:19:34,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:19:34,338 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 12:19:34,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 12:19:34,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:34,339 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-10-04 12:19:34,339 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:34,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:34,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-10-04 12:19:34,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:34,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:34,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:34,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:34,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:34,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:34,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:34,892 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:19:34,996 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 12:19:34,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:34,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:35,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:35,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 12:19:35,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:19:35,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:19:35,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:19:35,035 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-10-04 12:19:35,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:35,108 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 12:19:35,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:19:35,109 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-04 12:19:35,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:35,110 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:19:35,110 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:19:35,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:19:35,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:19:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 12:19:35,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:19:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 12:19:35,114 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-10-04 12:19:35,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:35,115 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 12:19:35,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:19:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 12:19:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:19:35,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:35,115 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-10-04 12:19:35,116 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:35,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:35,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-10-04 12:19:35,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:35,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:35,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:35,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:35,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:35,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:35,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:35,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:35,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:35,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:35,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:19:35,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:19:35,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:19:35,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:19:35,704 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-10-04 12:19:35,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:35,773 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 12:19:35,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:19:35,773 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-04 12:19:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:35,774 INFO L225 Difference]: With dead ends: 71 [2018-10-04 12:19:35,774 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:19:35,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:19:35,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:19:35,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 12:19:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 12:19:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 12:19:35,777 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-10-04 12:19:35,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:35,778 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 12:19:35,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:19:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 12:19:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:19:35,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:35,778 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-10-04 12:19:35,778 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:35,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:35,779 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-10-04 12:19:35,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:35,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:35,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:35,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:35,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:36,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:36,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:36,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:19:36,649 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:19:36,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:36,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:36,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:36,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:19:36,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:19:36,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:19:36,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:19:36,687 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-10-04 12:19:36,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:36,746 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 12:19:36,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:19:36,747 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-04 12:19:36,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:36,747 INFO L225 Difference]: With dead ends: 73 [2018-10-04 12:19:36,747 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:19:36,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:19:36,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:19:36,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 12:19:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 12:19:36,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-04 12:19:36,751 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-10-04 12:19:36,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:36,752 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-04 12:19:36,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:19:36,752 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-04 12:19:36,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 12:19:36,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:36,752 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-10-04 12:19:36,753 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:36,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:36,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-10-04 12:19:36,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:36,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:36,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:36,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:36,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:37,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:37,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:37,325 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:19:37,472 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 12:19:37,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:37,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:37,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:37,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 12:19:37,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:19:37,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:19:37,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:19:37,512 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-10-04 12:19:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:37,594 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 12:19:37,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:19:37,595 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-04 12:19:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:37,596 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:19:37,596 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 12:19:37,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:19:37,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 12:19:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 12:19:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 12:19:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-04 12:19:37,600 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-10-04 12:19:37,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:37,600 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-04 12:19:37,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:19:37,601 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-04 12:19:37,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 12:19:37,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:37,601 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-10-04 12:19:37,601 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:37,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:37,602 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-10-04 12:19:37,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:37,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:37,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:37,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:37,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:38,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:38,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:38,621 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:19:38,662 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:19:38,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:38,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:38,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:38,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 12:19:38,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:19:38,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:19:38,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:19:38,703 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-10-04 12:19:38,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:38,869 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 12:19:38,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:19:38,870 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-04 12:19:38,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:38,871 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:19:38,871 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 12:19:38,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:19:38,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 12:19:38,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 12:19:38,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 12:19:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-04 12:19:38,875 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-10-04 12:19:38,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:38,876 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-04 12:19:38,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:19:38,876 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-04 12:19:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:19:38,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:38,877 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-10-04 12:19:38,877 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:38,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:38,877 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-10-04 12:19:38,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:38,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:38,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:38,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:38,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:39,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:39,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:39,693 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:19:40,022 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 12:19:40,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:40,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:40,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:40,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:19:40,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:19:40,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:19:40,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:19:40,064 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-10-04 12:19:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:40,130 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 12:19:40,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:19:40,130 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-04 12:19:40,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:40,131 INFO L225 Difference]: With dead ends: 79 [2018-10-04 12:19:40,131 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 12:19:40,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:19:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 12:19:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 12:19:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 12:19:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-04 12:19:40,135 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-10-04 12:19:40,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:40,135 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-04 12:19:40,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:19:40,136 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-04 12:19:40,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 12:19:40,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:40,136 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-10-04 12:19:40,136 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:40,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:40,137 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-10-04 12:19:40,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:40,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:40,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:40,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:40,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:40,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:40,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:40,812 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:19:40,972 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 12:19:40,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:40,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:41,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:41,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 12:19:41,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:19:41,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:19:41,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:19:41,026 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-10-04 12:19:41,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:41,567 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 12:19:41,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:19:41,569 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-04 12:19:41,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:41,570 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:19:41,570 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 12:19:41,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:19:41,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 12:19:41,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 12:19:41,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 12:19:41,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-04 12:19:41,572 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-10-04 12:19:41,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:41,573 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-04 12:19:41,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:19:41,573 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-04 12:19:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:19:41,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:41,573 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-10-04 12:19:41,574 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:41,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:41,574 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-10-04 12:19:41,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:41,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:41,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:41,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:41,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:42,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:42,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:42,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:42,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:42,299 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:42,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:19:42,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:19:42,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:19:42,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:19:42,300 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-10-04 12:19:42,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:42,382 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 12:19:42,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:19:42,382 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-04 12:19:42,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:42,383 INFO L225 Difference]: With dead ends: 83 [2018-10-04 12:19:42,383 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 12:19:42,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:19:42,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 12:19:42,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 12:19:42,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 12:19:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-04 12:19:42,386 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-10-04 12:19:42,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:42,386 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-04 12:19:42,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:19:42,386 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-04 12:19:42,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 12:19:42,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:42,387 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-10-04 12:19:42,387 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:42,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:42,387 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-10-04 12:19:42,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:42,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:42,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:42,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:42,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:43,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:43,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:43,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:19:43,401 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:19:43,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:43,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:43,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:43,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 12:19:43,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:19:43,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:19:43,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:19:43,444 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-10-04 12:19:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:43,531 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 12:19:43,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:19:43,531 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-04 12:19:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:43,532 INFO L225 Difference]: With dead ends: 85 [2018-10-04 12:19:43,533 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:19:43,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:19:43,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:19:43,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 12:19:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 12:19:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-04 12:19:43,536 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-10-04 12:19:43,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:43,536 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-04 12:19:43,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:19:43,536 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-04 12:19:43,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 12:19:43,537 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:43,537 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-10-04 12:19:43,537 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:43,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:43,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-10-04 12:19:43,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:43,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:43,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:43,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:43,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:44,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:44,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:44,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:19:44,760 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-04 12:19:44,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:44,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:44,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:44,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 12:19:44,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:19:44,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:19:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:19:44,800 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-10-04 12:19:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:44,909 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 12:19:44,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:19:44,910 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-04 12:19:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:44,911 INFO L225 Difference]: With dead ends: 87 [2018-10-04 12:19:44,911 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 12:19:44,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:19:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 12:19:44,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 12:19:44,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 12:19:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-04 12:19:44,916 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-10-04 12:19:44,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:44,916 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-04 12:19:44,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:19:44,916 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-04 12:19:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 12:19:44,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:44,917 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-10-04 12:19:44,917 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:44,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:44,917 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-10-04 12:19:44,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:44,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:44,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:44,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:44,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:45,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:45,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:45,750 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:19:45,789 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:19:45,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:45,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:45,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:45,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 12:19:45,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:19:45,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:19:45,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:19:45,826 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-10-04 12:19:45,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:45,900 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 12:19:45,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:19:45,901 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-04 12:19:45,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:45,901 INFO L225 Difference]: With dead ends: 89 [2018-10-04 12:19:45,902 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 12:19:45,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:19:45,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 12:19:45,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 12:19:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 12:19:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-04 12:19:45,906 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-10-04 12:19:45,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:45,907 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-04 12:19:45,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:19:45,907 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-04 12:19:45,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 12:19:45,907 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:45,908 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-10-04 12:19:45,908 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:45,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:45,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-10-04 12:19:45,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:45,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:45,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:45,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:45,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:47,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:47,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:47,415 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:19:47,954 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-04 12:19:47,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:47,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:48,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:48,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:19:48,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:19:48,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:19:48,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:19:48,008 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-10-04 12:19:48,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:48,156 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 12:19:48,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:19:48,157 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-04 12:19:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:48,157 INFO L225 Difference]: With dead ends: 91 [2018-10-04 12:19:48,157 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 12:19:48,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:19:48,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 12:19:48,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 12:19:48,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 12:19:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-04 12:19:48,161 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-10-04 12:19:48,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:48,162 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-04 12:19:48,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:19:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-04 12:19:48,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 12:19:48,162 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:48,163 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-10-04 12:19:48,163 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:48,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:48,163 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-10-04 12:19:48,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:48,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:48,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:48,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:48,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:49,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:49,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:49,009 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:19:49,230 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 12:19:49,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:49,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:49,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:49,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 12:19:49,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:19:49,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:19:49,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:19:49,276 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-10-04 12:19:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:49,339 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 12:19:49,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:19:49,339 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-04 12:19:49,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:49,340 INFO L225 Difference]: With dead ends: 93 [2018-10-04 12:19:49,341 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 12:19:49,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:19:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 12:19:49,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 12:19:49,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 12:19:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-04 12:19:49,345 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-10-04 12:19:49,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:49,346 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-04 12:19:49,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:19:49,346 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-04 12:19:49,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 12:19:49,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:49,346 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-10-04 12:19:49,346 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:49,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:49,347 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-10-04 12:19:49,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:49,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:49,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:49,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:49,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:52,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:52,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:52,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:52,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:52,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:52,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:19:52,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:19:52,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:19:52,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:19:52,149 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-10-04 12:19:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:52,232 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 12:19:52,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:19:52,233 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-04 12:19:52,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:52,234 INFO L225 Difference]: With dead ends: 95 [2018-10-04 12:19:52,234 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 12:19:52,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:19:52,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 12:19:52,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 12:19:52,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 12:19:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-04 12:19:52,238 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-10-04 12:19:52,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:52,239 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-04 12:19:52,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:19:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-04 12:19:52,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 12:19:52,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:52,239 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-10-04 12:19:52,239 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:52,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:52,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-10-04 12:19:52,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:52,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:52,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:52,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:52,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:53,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:53,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:53,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:19:54,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:19:54,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:54,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:54,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:54,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 12:19:54,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:19:54,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:19:54,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:19:54,059 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-10-04 12:19:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:54,342 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 12:19:54,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:19:54,343 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-04 12:19:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:54,344 INFO L225 Difference]: With dead ends: 97 [2018-10-04 12:19:54,344 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 12:19:54,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:19:54,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 12:19:54,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 12:19:54,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 12:19:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-04 12:19:54,349 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-10-04 12:19:54,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:54,349 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-04 12:19:54,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:19:54,349 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-04 12:19:54,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 12:19:54,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:54,350 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-10-04 12:19:54,350 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:54,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:54,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-10-04 12:19:54,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:54,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:54,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:54,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:54,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:55,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:55,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:55,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:19:55,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-04 12:19:55,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:55,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:55,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:55,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:19:55,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:19:55,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:19:55,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:19:55,709 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-10-04 12:19:55,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:55,818 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 12:19:55,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:19:55,818 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-04 12:19:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:55,819 INFO L225 Difference]: With dead ends: 99 [2018-10-04 12:19:55,819 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 12:19:55,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:19:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 12:19:55,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 12:19:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 12:19:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-04 12:19:55,823 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-10-04 12:19:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:55,823 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-04 12:19:55,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:19:55,823 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-04 12:19:55,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 12:19:55,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:55,824 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-10-04 12:19:55,824 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:55,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:55,824 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-10-04 12:19:55,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:55,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:55,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:55,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:55,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:57,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:57,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:57,189 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:19:57,236 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:19:57,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:57,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:57,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:57,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 12:19:57,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:19:57,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:19:57,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:19:57,284 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-10-04 12:19:57,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:57,384 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 12:19:57,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:19:57,385 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-04 12:19:57,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:57,385 INFO L225 Difference]: With dead ends: 101 [2018-10-04 12:19:57,385 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 12:19:57,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:19:57,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 12:19:57,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 12:19:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 12:19:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-04 12:19:57,389 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-10-04 12:19:57,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:57,389 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-04 12:19:57,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:19:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-04 12:19:57,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 12:19:57,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:57,390 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-10-04 12:19:57,390 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:57,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:57,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-10-04 12:19:57,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:57,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:57,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:57,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:57,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:58,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:58,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:19:58,777 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:19:59,647 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-04 12:19:59,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:59,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:59,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:59,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:19:59,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:19:59,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:19:59,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:19:59,707 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-10-04 12:19:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:59,873 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 12:19:59,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:19:59,874 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-04 12:19:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:59,874 INFO L225 Difference]: With dead ends: 103 [2018-10-04 12:19:59,874 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 12:19:59,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:19:59,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 12:19:59,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 12:19:59,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 12:19:59,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-04 12:19:59,878 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-10-04 12:19:59,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:59,878 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-04 12:19:59,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:19:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-04 12:19:59,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 12:19:59,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:59,879 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-10-04 12:19:59,879 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:59,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:59,879 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-10-04 12:19:59,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:59,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:59,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:59,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:59,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:01,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:01,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:01,093 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:20:01,403 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 12:20:01,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:01,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:01,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:01,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 12:20:01,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:20:01,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:20:01,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:20:01,444 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-10-04 12:20:01,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:01,563 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 12:20:01,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:20:01,563 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-04 12:20:01,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:01,564 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:20:01,564 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 12:20:01,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:20:01,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 12:20:01,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 12:20:01,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 12:20:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-04 12:20:01,569 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-10-04 12:20:01,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:01,569 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-04 12:20:01,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:20:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-04 12:20:01,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 12:20:01,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:01,570 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-10-04 12:20:01,570 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:01,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:01,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-10-04 12:20:01,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:01,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:01,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:01,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:01,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:03,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:03,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:03,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:20:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:03,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:03,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:03,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:20:03,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:20:03,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:20:03,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:20:03,158 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-10-04 12:20:04,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:04,046 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-04 12:20:04,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:20:04,046 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-04 12:20:04,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:04,047 INFO L225 Difference]: With dead ends: 107 [2018-10-04 12:20:04,047 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 12:20:04,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:20:04,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 12:20:04,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 12:20:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 12:20:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-04 12:20:04,050 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-10-04 12:20:04,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:04,050 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-04 12:20:04,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:20:04,050 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-04 12:20:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 12:20:04,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:04,052 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-10-04 12:20:04,052 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:04,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:04,052 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-10-04 12:20:04,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:04,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:04,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:04,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:20:04,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:05,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:05,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:05,383 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:20:05,433 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:20:05,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:05,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:05,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:05,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 12:20:05,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:20:05,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:20:05,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:20:05,482 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-10-04 12:20:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:05,684 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 12:20:05,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:20:05,684 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-04 12:20:05,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:05,686 INFO L225 Difference]: With dead ends: 109 [2018-10-04 12:20:05,686 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 12:20:05,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:20:05,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 12:20:05,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 12:20:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 12:20:05,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-04 12:20:05,692 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-10-04 12:20:05,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:05,692 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-04 12:20:05,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:20:05,692 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-04 12:20:05,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 12:20:05,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:05,693 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-10-04 12:20:05,693 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:05,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:05,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-10-04 12:20:05,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:05,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:05,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:05,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:05,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:06,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:06,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:06,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:20:07,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-04 12:20:07,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:07,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:07,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:07,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 12:20:07,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:20:07,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:20:07,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:20:07,301 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-10-04 12:20:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:07,490 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-04 12:20:07,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:20:07,490 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-04 12:20:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:07,491 INFO L225 Difference]: With dead ends: 111 [2018-10-04 12:20:07,492 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 12:20:07,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:20:07,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 12:20:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 12:20:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 12:20:07,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-04 12:20:07,499 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-10-04 12:20:07,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:07,500 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-04 12:20:07,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:20:07,500 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-04 12:20:07,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 12:20:07,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:07,501 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-10-04 12:20:07,501 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:07,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:07,501 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-10-04 12:20:07,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:07,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:07,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:07,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:07,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:09,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:09,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:09,283 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:20:09,353 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:20:09,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:09,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:09,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:09,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 12:20:09,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:20:09,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:20:09,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:20:09,413 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-10-04 12:20:09,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:09,585 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-04 12:20:09,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:20:09,585 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-04 12:20:09,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:09,586 INFO L225 Difference]: With dead ends: 113 [2018-10-04 12:20:09,586 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 12:20:09,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:20:09,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 12:20:09,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 12:20:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 12:20:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-04 12:20:09,591 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-10-04 12:20:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:09,592 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-04 12:20:09,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:20:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-04 12:20:09,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 12:20:09,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:09,593 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-10-04 12:20:09,593 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:09,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:09,593 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-10-04 12:20:09,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:09,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:09,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:09,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:09,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:10,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:10,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:10,799 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:20:12,233 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-04 12:20:12,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:12,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:12,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:12,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 12:20:12,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:20:12,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:20:12,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:20:12,292 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-10-04 12:20:12,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:12,376 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-04 12:20:12,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:20:12,377 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-04 12:20:12,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:12,378 INFO L225 Difference]: With dead ends: 115 [2018-10-04 12:20:12,378 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 12:20:12,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:20:12,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 12:20:12,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 12:20:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 12:20:12,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-04 12:20:12,383 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-10-04 12:20:12,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:12,384 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-04 12:20:12,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:20:12,384 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-04 12:20:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 12:20:12,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:12,384 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-10-04 12:20:12,385 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:12,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:12,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-10-04 12:20:12,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:12,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:12,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:12,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:12,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:13,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:13,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:13,893 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:20:14,324 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 12:20:14,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:14,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:14,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:14,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 12:20:14,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 12:20:14,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 12:20:14,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:20:14,387 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-10-04 12:20:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:15,323 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-04 12:20:15,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:20:15,323 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-04 12:20:15,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:15,324 INFO L225 Difference]: With dead ends: 117 [2018-10-04 12:20:15,324 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 12:20:15,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:20:15,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 12:20:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 12:20:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 12:20:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-04 12:20:15,328 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-10-04 12:20:15,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:15,328 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-04 12:20:15,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 12:20:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-04 12:20:15,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 12:20:15,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:15,329 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-10-04 12:20:15,329 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:15,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:15,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-10-04 12:20:15,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:15,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:15,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:15,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:15,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:16,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:16,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:16,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:20:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:16,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:16,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:16,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 12:20:16,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:20:16,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:20:16,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:20:16,645 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-10-04 12:20:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:16,997 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-04 12:20:16,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:20:16,998 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-04 12:20:16,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:16,999 INFO L225 Difference]: With dead ends: 119 [2018-10-04 12:20:17,000 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 12:20:17,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:20:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 12:20:17,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-04 12:20:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 12:20:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-04 12:20:17,004 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-10-04 12:20:17,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:17,005 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-04 12:20:17,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:20:17,005 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-04 12:20:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 12:20:17,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:17,006 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-10-04 12:20:17,006 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:17,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:17,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-10-04 12:20:17,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:17,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:17,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:17,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:20:17,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:18,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:18,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:18,398 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:20:18,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:20:18,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:18,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:18,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:18,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 12:20:18,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:20:18,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:20:18,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:20:18,516 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-10-04 12:20:19,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:19,328 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-04 12:20:19,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:20:19,329 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-04 12:20:19,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:19,330 INFO L225 Difference]: With dead ends: 121 [2018-10-04 12:20:19,330 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 12:20:19,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:20:19,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 12:20:19,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-04 12:20:19,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 12:20:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-04 12:20:19,333 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-10-04 12:20:19,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:19,334 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-04 12:20:19,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:20:19,334 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-04 12:20:19,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 12:20:19,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:19,335 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-10-04 12:20:19,335 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:19,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:19,335 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-10-04 12:20:19,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:19,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:19,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:19,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:19,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:20,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:20,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:20,583 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:20:21,215 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-04 12:20:21,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:21,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:21,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:21,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 12:20:21,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:20:21,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:20:21,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:20:21,281 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-10-04 12:20:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:21,780 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-04 12:20:21,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:20:21,780 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-04 12:20:21,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:21,781 INFO L225 Difference]: With dead ends: 123 [2018-10-04 12:20:21,781 INFO L226 Difference]: Without dead ends: 121 [2018-10-04 12:20:21,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:20:21,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-04 12:20:21,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-04 12:20:21,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 12:20:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-10-04 12:20:21,784 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-10-04 12:20:21,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:21,785 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-10-04 12:20:21,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:20:21,785 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-10-04 12:20:21,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-04 12:20:21,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:21,786 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-10-04 12:20:21,786 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:21,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:21,786 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-10-04 12:20:21,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:21,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:21,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:21,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:21,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:23,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:23,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:23,144 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:20:23,202 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:20:23,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:23,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:23,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:23,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 12:20:23,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 12:20:23,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 12:20:23,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 12:20:23,245 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-10-04 12:20:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:23,395 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-04 12:20:23,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:20:23,395 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-04 12:20:23,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:23,396 INFO L225 Difference]: With dead ends: 125 [2018-10-04 12:20:23,396 INFO L226 Difference]: Without dead ends: 123 [2018-10-04 12:20:23,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 12:20:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-04 12:20:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-04 12:20:23,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-04 12:20:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-04 12:20:23,401 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-10-04 12:20:23,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:23,402 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-04 12:20:23,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 12:20:23,402 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-04 12:20:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 12:20:23,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:23,403 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-10-04 12:20:23,403 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:23,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:23,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-10-04 12:20:23,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:23,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:23,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:23,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:23,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:25,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:25,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:25,206 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:20:27,253 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-04 12:20:27,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:27,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:27,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:27,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 12:20:27,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:20:27,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:20:27,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:20:27,310 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-10-04 12:20:27,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:27,456 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-04 12:20:27,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:20:27,456 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-04 12:20:27,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:27,457 INFO L225 Difference]: With dead ends: 127 [2018-10-04 12:20:27,457 INFO L226 Difference]: Without dead ends: 125 [2018-10-04 12:20:27,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:20:27,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-04 12:20:27,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-04 12:20:27,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 12:20:27,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-04 12:20:27,462 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-10-04 12:20:27,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:27,462 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-04 12:20:27,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:20:27,462 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-04 12:20:27,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-04 12:20:27,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:27,463 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-10-04 12:20:27,463 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:27,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:27,464 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-10-04 12:20:27,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:27,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:27,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:27,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:27,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:29,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:29,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:29,327 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:20:29,933 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-04 12:20:29,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:29,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:29,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:29,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-04 12:20:29,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 12:20:29,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 12:20:29,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 12:20:29,983 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-10-04 12:20:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:30,105 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-04 12:20:30,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:20:30,105 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-10-04 12:20:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:30,106 INFO L225 Difference]: With dead ends: 129 [2018-10-04 12:20:30,107 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 12:20:30,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 12:20:30,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 12:20:30,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-04 12:20:30,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-04 12:20:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-04 12:20:30,110 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-10-04 12:20:30,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:30,110 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-04 12:20:30,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 12:20:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-04 12:20:30,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-04 12:20:30,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:30,111 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-10-04 12:20:30,112 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:30,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:30,112 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-10-04 12:20:30,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:30,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:30,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:30,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:30,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:31,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:31,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:31,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:20:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:31,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:31,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:31,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 12:20:31,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 12:20:31,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 12:20:31,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:20:31,732 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-10-04 12:20:31,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:31,886 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-04 12:20:31,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 12:20:31,887 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-04 12:20:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:31,887 INFO L225 Difference]: With dead ends: 131 [2018-10-04 12:20:31,887 INFO L226 Difference]: Without dead ends: 129 [2018-10-04 12:20:31,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:20:31,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-04 12:20:31,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-04 12:20:31,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-04 12:20:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-04 12:20:31,891 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-10-04 12:20:31,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:31,891 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-04 12:20:31,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 12:20:31,891 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-04 12:20:31,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 12:20:31,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:31,892 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-10-04 12:20:31,892 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:31,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:31,892 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-10-04 12:20:31,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:31,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:31,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:31,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:20:31,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:33,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:33,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:33,404 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:20:33,468 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:20:33,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:33,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:33,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:33,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:33,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 12:20:33,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:20:33,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:20:33,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:20:33,511 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-10-04 12:20:33,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:33,610 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-04 12:20:33,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:20:33,610 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-10-04 12:20:33,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:33,612 INFO L225 Difference]: With dead ends: 133 [2018-10-04 12:20:33,612 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 12:20:33,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:20:33,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 12:20:33,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-04 12:20:33,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 12:20:33,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-04 12:20:33,617 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-10-04 12:20:33,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:33,617 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-04 12:20:33,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:20:33,617 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-04 12:20:33,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-04 12:20:33,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:33,618 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-10-04 12:20:33,618 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:33,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:33,619 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-10-04 12:20:33,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:33,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:33,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:33,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:33,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:35,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:35,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:35,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:20:36,358 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-04 12:20:36,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:36,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:36,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:36,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 12:20:36,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 12:20:36,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 12:20:36,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:20:36,440 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-10-04 12:20:36,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:36,599 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-04 12:20:36,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 12:20:36,599 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-04 12:20:36,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:36,600 INFO L225 Difference]: With dead ends: 135 [2018-10-04 12:20:36,600 INFO L226 Difference]: Without dead ends: 133 [2018-10-04 12:20:36,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:20:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-04 12:20:36,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-04 12:20:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 12:20:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-04 12:20:36,603 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-10-04 12:20:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:36,604 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-04 12:20:36,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 12:20:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-04 12:20:36,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 12:20:36,605 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:36,605 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-10-04 12:20:36,605 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:36,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:36,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-10-04 12:20:36,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:36,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:36,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:36,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:36,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:38,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:38,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:38,177 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:20:38,260 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:20:38,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:38,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:38,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:38,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 12:20:38,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 12:20:38,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 12:20:38,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 12:20:38,334 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-10-04 12:20:38,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:38,694 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-04 12:20:38,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:20:38,694 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-10-04 12:20:38,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:38,695 INFO L225 Difference]: With dead ends: 137 [2018-10-04 12:20:38,696 INFO L226 Difference]: Without dead ends: 135 [2018-10-04 12:20:38,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 12:20:38,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-04 12:20:38,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-04 12:20:38,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-04 12:20:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-04 12:20:38,700 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-10-04 12:20:38,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:38,700 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-04 12:20:38,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 12:20:38,700 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-04 12:20:38,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 12:20:38,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:38,701 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-10-04 12:20:38,701 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:38,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:38,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-10-04 12:20:38,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:38,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:38,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:38,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:38,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:40,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:40,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:40,647 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:20:43,594 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-04 12:20:43,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:43,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:43,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:43,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 12:20:43,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:20:43,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:20:43,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:20:43,664 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-10-04 12:20:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:43,776 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-04 12:20:43,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 12:20:43,776 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-04 12:20:43,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:43,777 INFO L225 Difference]: With dead ends: 139 [2018-10-04 12:20:43,777 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 12:20:43,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:20:43,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 12:20:43,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-04 12:20:43,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-04 12:20:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-04 12:20:43,782 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-10-04 12:20:43,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:43,782 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-04 12:20:43,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 12:20:43,782 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-04 12:20:43,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-04 12:20:43,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:43,783 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-10-04 12:20:43,783 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:43,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:43,784 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-10-04 12:20:43,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:43,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:43,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:43,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:43,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:45,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:45,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:45,739 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:20:46,561 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-04 12:20:46,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:46,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:46,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:46,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-04 12:20:46,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 12:20:46,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 12:20:46,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 12:20:46,632 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-10-04 12:20:46,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:46,764 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-04 12:20:46,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 12:20:46,765 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-10-04 12:20:46,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:46,766 INFO L225 Difference]: With dead ends: 141 [2018-10-04 12:20:46,766 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 12:20:46,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 12:20:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 12:20:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-04 12:20:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 12:20:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-04 12:20:46,770 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-10-04 12:20:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:46,770 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-04 12:20:46,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 12:20:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-04 12:20:46,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 12:20:46,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:46,771 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-10-04 12:20:46,771 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:46,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:46,771 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-10-04 12:20:46,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:46,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:46,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:46,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:46,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:48,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:48,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:48,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:20:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:48,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:48,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:48,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 12:20:48,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 12:20:48,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 12:20:48,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 12:20:48,615 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-10-04 12:20:48,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:48,733 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-04 12:20:48,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 12:20:48,733 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-04 12:20:48,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:48,735 INFO L225 Difference]: With dead ends: 143 [2018-10-04 12:20:48,735 INFO L226 Difference]: Without dead ends: 141 [2018-10-04 12:20:48,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 12:20:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-04 12:20:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-04 12:20:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-04 12:20:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-04 12:20:48,739 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-10-04 12:20:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:48,739 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-04 12:20:48,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 12:20:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-04 12:20:48,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 12:20:48,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:48,739 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-10-04 12:20:48,740 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:48,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:48,740 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-10-04 12:20:48,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:48,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:48,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:48,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:20:48,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:50,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:50,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:50,918 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:20:50,987 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:20:50,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:50,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:51,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:51,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 12:20:51,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:20:51,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:20:51,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:20:51,033 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-10-04 12:20:51,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:51,149 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-04 12:20:51,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:20:51,149 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-10-04 12:20:51,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:51,150 INFO L225 Difference]: With dead ends: 145 [2018-10-04 12:20:51,150 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 12:20:51,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:20:51,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 12:20:51,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-04 12:20:51,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 12:20:51,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-04 12:20:51,154 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-10-04 12:20:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:51,154 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-04 12:20:51,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:20:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-04 12:20:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 12:20:51,155 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:51,155 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-10-04 12:20:51,155 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:51,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:51,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-10-04 12:20:51,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:51,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:51,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:51,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:51,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:52,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:52,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:52,929 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:20:54,109 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-04 12:20:54,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:54,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:54,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:54,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 12:20:54,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 12:20:54,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 12:20:54,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 12:20:54,176 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-10-04 12:20:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:54,582 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-04 12:20:54,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:20:54,583 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-04 12:20:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:54,583 INFO L225 Difference]: With dead ends: 147 [2018-10-04 12:20:54,584 INFO L226 Difference]: Without dead ends: 145 [2018-10-04 12:20:54,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 12:20:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-04 12:20:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-04 12:20:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 12:20:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-10-04 12:20:54,587 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-10-04 12:20:54,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:54,587 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-10-04 12:20:54,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 12:20:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-10-04 12:20:54,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-04 12:20:54,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:54,588 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-10-04 12:20:54,589 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:54,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:54,589 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-10-04 12:20:54,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:54,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:54,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:54,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:54,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:56,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:56,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:56,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:20:56,705 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:20:56,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:56,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:56,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:56,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 12:20:56,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 12:20:56,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 12:20:56,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 12:20:56,762 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-10-04 12:20:56,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:56,954 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-04 12:20:56,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 12:20:56,954 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-10-04 12:20:56,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:56,955 INFO L225 Difference]: With dead ends: 149 [2018-10-04 12:20:56,955 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 12:20:56,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 12:20:56,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 12:20:56,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-04 12:20:56,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 12:20:56,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-04 12:20:56,958 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-10-04 12:20:56,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:56,959 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-04 12:20:56,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 12:20:56,959 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-04 12:20:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 12:20:56,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:56,960 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-10-04 12:20:56,960 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:56,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:56,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-10-04 12:20:56,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:56,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:56,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:56,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:56,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:58,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:58,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:20:58,885 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:21:03,020 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-04 12:21:03,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:03,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:03,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:03,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 12:21:03,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:21:03,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:21:03,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:21:03,083 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-10-04 12:21:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:03,248 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-04 12:21:03,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 12:21:03,249 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-04 12:21:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:03,250 INFO L225 Difference]: With dead ends: 151 [2018-10-04 12:21:03,250 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 12:21:03,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:21:03,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 12:21:03,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-04 12:21:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 12:21:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-04 12:21:03,254 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-10-04 12:21:03,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:03,254 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-04 12:21:03,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:21:03,254 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-04 12:21:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 12:21:03,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:03,255 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-10-04 12:21:03,256 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:03,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:03,256 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-10-04 12:21:03,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:03,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:03,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:03,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:03,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:05,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:05,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:05,552 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:21:06,647 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-04 12:21:06,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:06,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:06,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:06,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-04 12:21:06,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 12:21:06,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 12:21:06,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 12:21:06,708 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-10-04 12:21:06,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:06,857 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-04 12:21:06,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:21:06,857 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-10-04 12:21:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:06,859 INFO L225 Difference]: With dead ends: 153 [2018-10-04 12:21:06,859 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 12:21:06,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 12:21:06,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 12:21:06,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-04 12:21:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 12:21:06,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-04 12:21:06,864 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-10-04 12:21:06,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:06,864 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-04 12:21:06,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 12:21:06,864 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-04 12:21:06,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-04 12:21:06,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:06,865 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-10-04 12:21:06,865 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:06,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:06,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-10-04 12:21:06,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:06,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:06,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:06,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:06,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:08,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:08,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:08,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:21:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:09,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:09,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:09,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 12:21:09,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 12:21:09,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 12:21:09,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 12:21:09,131 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-10-04 12:21:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:09,335 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-04 12:21:09,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 12:21:09,336 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-04 12:21:09,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:09,336 INFO L225 Difference]: With dead ends: 155 [2018-10-04 12:21:09,336 INFO L226 Difference]: Without dead ends: 153 [2018-10-04 12:21:09,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 12:21:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-04 12:21:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-04 12:21:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-04 12:21:09,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-04 12:21:09,339 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-10-04 12:21:09,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:09,339 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-04 12:21:09,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 12:21:09,340 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-04 12:21:09,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 12:21:09,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:09,340 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-10-04 12:21:09,340 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:09,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:09,341 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-10-04 12:21:09,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:09,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:09,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:09,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:21:09,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:11,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:11,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:11,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:21:11,813 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:21:11,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:11,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:11,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:11,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 12:21:11,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 12:21:11,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 12:21:11,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 12:21:11,901 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-10-04 12:21:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:12,133 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-04 12:21:12,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 12:21:12,134 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-10-04 12:21:12,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:12,135 INFO L225 Difference]: With dead ends: 157 [2018-10-04 12:21:12,135 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 12:21:12,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 12:21:12,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 12:21:12,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-04 12:21:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 12:21:12,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-04 12:21:12,139 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-10-04 12:21:12,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:12,139 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-04 12:21:12,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 12:21:12,140 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-04 12:21:12,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-04 12:21:12,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:12,140 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-10-04 12:21:12,141 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:12,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:12,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-10-04 12:21:12,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:12,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:12,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:12,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:12,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:14,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:14,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:14,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:21:15,873 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-04 12:21:15,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:15,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:15,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:15,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 12:21:15,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 12:21:15,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 12:21:15,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 12:21:15,933 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-10-04 12:21:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:16,154 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-04 12:21:16,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 12:21:16,155 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-04 12:21:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:16,155 INFO L225 Difference]: With dead ends: 159 [2018-10-04 12:21:16,155 INFO L226 Difference]: Without dead ends: 157 [2018-10-04 12:21:16,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 12:21:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-04 12:21:16,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-04 12:21:16,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 12:21:16,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-10-04 12:21:16,159 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-10-04 12:21:16,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:16,159 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-10-04 12:21:16,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 12:21:16,159 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-10-04 12:21:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-04 12:21:16,159 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:16,160 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-10-04 12:21:16,160 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:16,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:16,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-10-04 12:21:16,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:16,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:16,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:16,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:16,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:18,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:18,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:18,410 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:21:18,489 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:21:18,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:18,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:18,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:18,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-04 12:21:18,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 12:21:18,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 12:21:18,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 12:21:18,540 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-10-04 12:21:18,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:18,762 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-04 12:21:18,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 12:21:18,763 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-10-04 12:21:18,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:18,763 INFO L225 Difference]: With dead ends: 161 [2018-10-04 12:21:18,764 INFO L226 Difference]: Without dead ends: 159 [2018-10-04 12:21:18,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 12:21:18,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-04 12:21:18,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-04 12:21:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-04 12:21:18,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-04 12:21:18,767 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-10-04 12:21:18,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:18,768 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-04 12:21:18,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-04 12:21:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-04 12:21:18,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 12:21:18,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:18,768 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-10-04 12:21:18,768 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:18,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:18,769 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-10-04 12:21:18,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:18,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:18,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:18,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:18,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:21,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:21,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:21,334 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:21:26,954 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-04 12:21:26,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:26,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:27,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:27,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 12:21:27,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:21:27,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:21:27,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:21:27,008 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-10-04 12:21:27,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:27,524 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-04 12:21:27,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 12:21:27,524 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-04 12:21:27,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:27,525 INFO L225 Difference]: With dead ends: 163 [2018-10-04 12:21:27,526 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 12:21:27,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:21:27,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 12:21:27,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-04 12:21:27,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 12:21:27,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-04 12:21:27,530 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-10-04 12:21:27,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:27,530 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-04 12:21:27,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:21:27,531 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-04 12:21:27,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-04 12:21:27,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:27,532 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-10-04 12:21:27,532 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:27,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:27,532 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-10-04 12:21:27,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:27,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:27,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:27,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:27,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:29,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:29,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:29,883 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:21:31,326 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-04 12:21:31,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:31,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:31,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:31,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-04 12:21:31,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-04 12:21:31,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-04 12:21:31,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 12:21:31,396 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-10-04 12:21:31,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:31,566 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-04 12:21:31,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 12:21:31,567 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-10-04 12:21:31,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:31,568 INFO L225 Difference]: With dead ends: 165 [2018-10-04 12:21:31,568 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 12:21:31,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 12:21:31,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 12:21:31,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-04 12:21:31,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-04 12:21:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-04 12:21:31,572 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-10-04 12:21:31,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:31,572 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-04 12:21:31,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-04 12:21:31,573 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-04 12:21:31,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-04 12:21:31,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:31,574 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-10-04 12:21:31,574 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:31,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:31,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-10-04 12:21:31,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:31,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:31,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:31,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:31,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:33,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:33,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:33,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:21:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:33,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:34,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:34,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 12:21:34,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 12:21:34,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 12:21:34,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 12:21:34,037 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-10-04 12:21:34,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:34,283 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-04 12:21:34,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 12:21:34,284 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-04 12:21:34,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:34,284 INFO L225 Difference]: With dead ends: 167 [2018-10-04 12:21:34,284 INFO L226 Difference]: Without dead ends: 165 [2018-10-04 12:21:34,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 12:21:34,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-04 12:21:34,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-04 12:21:34,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-04 12:21:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-04 12:21:34,288 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-10-04 12:21:34,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:34,288 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-04 12:21:34,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 12:21:34,288 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-04 12:21:34,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 12:21:34,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:34,289 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-10-04 12:21:34,289 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:34,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:34,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-10-04 12:21:34,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:34,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:34,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:34,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:21:34,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:37,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:37,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:37,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:21:37,175 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:21:37,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:37,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:37,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:37,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-04 12:21:37,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 12:21:37,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 12:21:37,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 12:21:37,230 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-10-04 12:21:37,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:37,404 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-04 12:21:37,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 12:21:37,405 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-10-04 12:21:37,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:37,406 INFO L225 Difference]: With dead ends: 169 [2018-10-04 12:21:37,406 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 12:21:37,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 12:21:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 12:21:37,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-04 12:21:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 12:21:37,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-04 12:21:37,411 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-10-04 12:21:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:37,411 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-04 12:21:37,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 12:21:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-04 12:21:37,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-04 12:21:37,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:37,412 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-10-04 12:21:37,412 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:37,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:37,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-10-04 12:21:37,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:37,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:37,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:37,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:37,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:39,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:39,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:39,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:21:42,056 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-04 12:21:42,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:42,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:42,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:42,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 12:21:42,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 12:21:42,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 12:21:42,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 12:21:42,117 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-10-04 12:21:42,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:42,304 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-10-04 12:21:42,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 12:21:42,304 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-04 12:21:42,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:42,305 INFO L225 Difference]: With dead ends: 171 [2018-10-04 12:21:42,305 INFO L226 Difference]: Without dead ends: 169 [2018-10-04 12:21:42,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 12:21:42,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-04 12:21:42,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-04 12:21:42,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-04 12:21:42,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-10-04 12:21:42,309 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-10-04 12:21:42,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:42,310 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-10-04 12:21:42,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 12:21:42,310 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-10-04 12:21:42,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-04 12:21:42,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:42,310 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-10-04 12:21:42,311 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:42,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:42,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-10-04 12:21:42,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:42,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:42,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:42,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:42,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:44,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:44,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:44,969 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:21:45,052 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:21:45,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:45,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:45,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:45,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-04 12:21:45,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-04 12:21:45,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-04 12:21:45,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 12:21:45,123 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-10-04 12:21:45,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:45,414 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-10-04 12:21:45,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 12:21:45,414 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-10-04 12:21:45,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:45,415 INFO L225 Difference]: With dead ends: 173 [2018-10-04 12:21:45,415 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 12:21:45,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 12:21:45,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 12:21:45,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-04 12:21:45,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 12:21:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-04 12:21:45,418 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-10-04 12:21:45,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:45,418 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-04 12:21:45,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-04 12:21:45,419 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-04 12:21:45,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 12:21:45,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:45,419 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-10-04 12:21:45,419 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:45,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:45,420 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-10-04 12:21:45,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:45,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:45,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:45,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:45,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:48,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:48,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:48,290 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:21:56,010 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-04 12:21:56,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:56,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:56,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:56,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 12:21:56,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 12:21:56,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 12:21:56,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 12:21:56,072 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-10-04 12:21:56,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:56,374 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-04 12:21:56,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 12:21:56,374 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-04 12:21:56,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:56,375 INFO L225 Difference]: With dead ends: 175 [2018-10-04 12:21:56,375 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 12:21:56,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 12:21:56,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 12:21:56,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-04 12:21:56,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-04 12:21:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-04 12:21:56,380 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-10-04 12:21:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:56,380 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-04 12:21:56,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 12:21:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-04 12:21:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-04 12:21:56,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:56,381 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-10-04 12:21:56,382 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:56,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:56,382 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-10-04 12:21:56,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:56,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:56,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:56,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:56,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:58,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:58,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:21:58,932 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:22:00,801 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-04 12:22:00,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:00,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:00,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:00,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-04 12:22:00,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-04 12:22:00,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-04 12:22:00,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 12:22:00,861 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-10-04 12:22:01,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:01,331 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-04 12:22:01,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 12:22:01,331 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-10-04 12:22:01,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:01,332 INFO L225 Difference]: With dead ends: 177 [2018-10-04 12:22:01,332 INFO L226 Difference]: Without dead ends: 175 [2018-10-04 12:22:01,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 12:22:01,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-04 12:22:01,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-04 12:22:01,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 12:22:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-10-04 12:22:01,337 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-10-04 12:22:01,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:01,338 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-10-04 12:22:01,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-04 12:22:01,338 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-10-04 12:22:01,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-04 12:22:01,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:01,339 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-10-04 12:22:01,339 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:01,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:01,339 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-10-04 12:22:01,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:01,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:01,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:01,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:01,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:04,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:04,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:22:04,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:04,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:04,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:04,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 12:22:04,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 12:22:04,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 12:22:04,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 12:22:04,161 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-10-04 12:22:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:04,461 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-10-04 12:22:04,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 12:22:04,461 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-04 12:22:04,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:04,462 INFO L225 Difference]: With dead ends: 179 [2018-10-04 12:22:04,462 INFO L226 Difference]: Without dead ends: 177 [2018-10-04 12:22:04,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 12:22:04,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-04 12:22:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-04 12:22:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-04 12:22:04,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-10-04 12:22:04,466 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-10-04 12:22:04,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:04,467 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-10-04 12:22:04,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 12:22:04,467 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-10-04 12:22:04,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-04 12:22:04,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:04,468 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-10-04 12:22:04,468 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:04,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:04,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-10-04 12:22:04,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:04,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:04,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:04,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:04,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:07,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:07,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:22:07,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:22:07,687 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:22:07,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:07,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:07,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:07,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-04 12:22:07,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 12:22:07,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 12:22:07,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 12:22:07,744 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-10-04 12:22:07,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:07,912 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-04 12:22:07,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 12:22:07,912 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-10-04 12:22:07,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:07,913 INFO L225 Difference]: With dead ends: 181 [2018-10-04 12:22:07,913 INFO L226 Difference]: Without dead ends: 179 [2018-10-04 12:22:07,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 12:22:07,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-04 12:22:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-04 12:22:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-04 12:22:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-04 12:22:07,917 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-10-04 12:22:07,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:07,917 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-04 12:22:07,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 12:22:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-04 12:22:07,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-04 12:22:07,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:07,918 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-10-04 12:22:07,918 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:07,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:07,918 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-10-04 12:22:07,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:07,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:07,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:07,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:07,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:10,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:10,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:22:10,701 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:22:13,458 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-04 12:22:13,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:13,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:13,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:13,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 12:22:13,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 12:22:13,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 12:22:13,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 12:22:13,519 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-10-04 12:22:13,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:13,816 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-10-04 12:22:13,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 12:22:13,816 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-04 12:22:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:13,817 INFO L225 Difference]: With dead ends: 183 [2018-10-04 12:22:13,817 INFO L226 Difference]: Without dead ends: 181 [2018-10-04 12:22:13,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 12:22:13,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-04 12:22:13,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-04 12:22:13,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-04 12:22:13,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-10-04 12:22:13,821 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-10-04 12:22:13,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:13,821 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-10-04 12:22:13,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 12:22:13,821 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-10-04 12:22:13,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-04 12:22:13,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:13,822 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-10-04 12:22:13,822 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:13,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:13,822 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-10-04 12:22:13,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:13,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:13,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:13,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:13,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:17,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:17,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:22:17,030 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:22:17,119 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:22:17,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:17,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:17,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:17,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-04 12:22:17,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 12:22:17,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 12:22:17,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 12:22:17,177 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-10-04 12:22:17,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:17,381 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-10-04 12:22:17,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 12:22:17,381 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-10-04 12:22:17,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:17,383 INFO L225 Difference]: With dead ends: 185 [2018-10-04 12:22:17,383 INFO L226 Difference]: Without dead ends: 183 [2018-10-04 12:22:17,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 12:22:17,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-04 12:22:17,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-04 12:22:17,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-04 12:22:17,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-04 12:22:17,387 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-10-04 12:22:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:17,387 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-04 12:22:17,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 12:22:17,387 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-04 12:22:17,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 12:22:17,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:17,388 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-10-04 12:22:17,388 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:17,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:17,389 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-10-04 12:22:17,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:17,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:17,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:17,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:17,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:20,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:20,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:22:20,315 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:22:30,774 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-04 12:22:30,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:30,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:30,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:30,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 12:22:30,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 12:22:30,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 12:22:30,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 12:22:30,841 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-10-04 12:22:31,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:31,179 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-04 12:22:31,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 12:22:31,179 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-04 12:22:31,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:31,180 INFO L225 Difference]: With dead ends: 187 [2018-10-04 12:22:31,180 INFO L226 Difference]: Without dead ends: 185 [2018-10-04 12:22:31,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 12:22:31,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-04 12:22:31,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-04 12:22:31,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 12:22:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-10-04 12:22:31,183 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-10-04 12:22:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:31,183 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-10-04 12:22:31,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 12:22:31,184 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-10-04 12:22:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-04 12:22:31,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:31,184 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-10-04 12:22:31,185 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:31,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:31,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-10-04 12:22:31,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:31,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:31,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:31,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:31,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:34,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:34,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:22:34,544 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:22:36,955 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-04 12:22:36,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:36,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:37,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:37,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-04 12:22:37,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-04 12:22:37,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-04 12:22:37,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 12:22:37,022 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-10-04 12:22:37,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:37,280 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-04 12:22:37,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 12:22:37,281 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-10-04 12:22:37,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:37,281 INFO L225 Difference]: With dead ends: 189 [2018-10-04 12:22:37,282 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 12:22:37,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 12:22:37,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 12:22:37,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-04 12:22:37,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-04 12:22:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-10-04 12:22:37,286 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-10-04 12:22:37,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:37,286 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-10-04 12:22:37,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-04 12:22:37,286 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-10-04 12:22:37,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-04 12:22:37,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:37,287 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-10-04 12:22:37,288 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:37,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:37,288 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-10-04 12:22:37,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:37,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:37,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:37,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:37,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:40,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:40,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:22:40,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:40,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:40,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:40,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 12:22:40,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 12:22:40,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 12:22:40,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 12:22:40,496 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-10-04 12:22:40,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:40,678 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-10-04 12:22:40,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 12:22:40,679 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-10-04 12:22:40,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:40,680 INFO L225 Difference]: With dead ends: 191 [2018-10-04 12:22:40,680 INFO L226 Difference]: Without dead ends: 189 [2018-10-04 12:22:40,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 12:22:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-04 12:22:40,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-04 12:22:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-04 12:22:40,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-10-04 12:22:40,685 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-10-04 12:22:40,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:40,685 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-10-04 12:22:40,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 12:22:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-10-04 12:22:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 12:22:40,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:40,686 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-10-04 12:22:40,686 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:40,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:40,687 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-10-04 12:22:40,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:40,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:40,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:40,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:40,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:44,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:44,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:22:44,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:22:44,831 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:22:44,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:44,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:44,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:44,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-04 12:22:44,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-04 12:22:44,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-04 12:22:44,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 12:22:44,892 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-10-04 12:22:45,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:45,072 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-04 12:22:45,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 12:22:45,072 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-10-04 12:22:45,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:45,073 INFO L225 Difference]: With dead ends: 193 [2018-10-04 12:22:45,073 INFO L226 Difference]: Without dead ends: 191 [2018-10-04 12:22:45,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 12:22:45,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-04 12:22:45,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-04 12:22:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-04 12:22:45,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-04 12:22:45,077 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-10-04 12:22:45,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:45,078 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-04 12:22:45,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-04 12:22:45,078 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-04 12:22:45,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-04 12:22:45,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:45,079 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-10-04 12:22:45,079 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:45,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:45,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-10-04 12:22:45,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:45,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:45,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:45,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:45,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:48,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:48,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:22:48,629 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:22:52,183 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-04 12:22:52,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:52,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:52,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:52,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 12:22:52,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 12:22:52,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 12:22:52,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 12:22:52,250 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-10-04 12:22:52,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:52,482 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-10-04 12:22:52,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 12:22:52,483 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-10-04 12:22:52,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:52,484 INFO L225 Difference]: With dead ends: 195 [2018-10-04 12:22:52,484 INFO L226 Difference]: Without dead ends: 193 [2018-10-04 12:22:52,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 12:22:52,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-04 12:22:52,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-04 12:22:52,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-04 12:22:52,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-04 12:22:52,487 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-10-04 12:22:52,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:52,487 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-04 12:22:52,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 12:22:52,487 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-04 12:22:52,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-04 12:22:52,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:52,488 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-10-04 12:22:52,488 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:52,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:52,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-10-04 12:22:52,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:52,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:52,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:52,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:52,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:55,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:55,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:22:55,711 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:22:55,804 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:22:55,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:55,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:55,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:55,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-04 12:22:55,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 12:22:55,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 12:22:55,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 12:22:55,882 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-10-04 12:22:56,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:56,201 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-04 12:22:56,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 12:22:56,201 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-10-04 12:22:56,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:56,202 INFO L225 Difference]: With dead ends: 197 [2018-10-04 12:22:56,202 INFO L226 Difference]: Without dead ends: 195 [2018-10-04 12:22:56,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 12:22:56,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-04 12:22:56,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-04 12:22:56,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-04 12:22:56,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-10-04 12:22:56,205 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-10-04 12:22:56,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:56,206 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-10-04 12:22:56,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 12:22:56,206 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-10-04 12:22:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-04 12:22:56,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:56,207 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-10-04 12:22:56,207 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:56,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:56,207 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-10-04 12:22:56,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:56,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:56,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:56,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:56,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:59,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:59,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:22:59,918 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:23:13,564 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-04 12:23:13,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:13,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:13,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:13,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 12:23:13,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 12:23:13,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 12:23:13,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 12:23:13,630 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-10-04 12:23:13,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:13,966 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-04 12:23:13,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 12:23:13,966 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-10-04 12:23:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:13,968 INFO L225 Difference]: With dead ends: 199 [2018-10-04 12:23:13,968 INFO L226 Difference]: Without dead ends: 197 [2018-10-04 12:23:13,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 12:23:13,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-04 12:23:13,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-04 12:23:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-04 12:23:13,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-10-04 12:23:13,973 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-10-04 12:23:13,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:13,973 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-10-04 12:23:13,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 12:23:13,973 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-10-04 12:23:13,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-04 12:23:13,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:13,974 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-10-04 12:23:13,974 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:13,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:13,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-10-04 12:23:13,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:13,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:13,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:13,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:13,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:17,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:17,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:23:17,351 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... [2018-10-04 12:23:20,394 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-04 12:23:20,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:20,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:20,403 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-04 12:23:20,603 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:23:20,604 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:23:20,609 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:23:20,609 INFO L202 PluginConnector]: Adding new model array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:23:20 BoogieIcfgContainer [2018-10-04 12:23:20,609 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:23:20,610 INFO L168 Benchmark]: Toolchain (without parser) took 245965.80 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -61.9 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 165.9 MB). Peak memory consumption was 104.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:23:20,611 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:23:20,611 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:23:20,612 INFO L168 Benchmark]: Boogie Preprocessor took 26.33 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:23:20,612 INFO L168 Benchmark]: RCFGBuilder took 323.34 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:23:20,612 INFO L168 Benchmark]: TraceAbstraction took 245564.90 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -61.9 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 144.8 MB). Peak memory consumption was 82.9 MB. Max. memory is 7.1 GB. [2018-10-04 12:23:20,614 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.33 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 323.34 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 245564.90 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -61.9 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 144.8 MB). Peak memory consumption was 82.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 42). Cancelled while BasicCegarLoop was analyzing trace of length 197 with TraceHistMax 97, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 245.4s OverallTime, 97 OverallIterations, 97 TraceHistogramMax, 18.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 384 SDtfs, 0 SDslu, 7763 SDs, 0 SdLazy, 7859 SolverSat, 155 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14157 GetRequests, 9501 SyntacticMatches, 0 SemanticMatches, 4656 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 132.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=197occurred in iteration=96, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 96 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 76.8s SatisfiabilityAnalysisTime, 137.5s InterpolantComputationTime, 19004 NumberOfCodeBlocks, 19004 NumberOfCodeBlocksAsserted, 2511 NumberOfCheckSat, 18813 ConstructedInterpolants, 0 QuantifiedInterpolants, 7263531 SizeOfPredicates, 95 NumberOfNonLiveVariables, 33155 ConjunctsInSsa, 4750 ConjunctsInUnsatCore, 191 InterpolantComputations, 1 PerfectInterpolantSequences, 0/589760 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-23-20-623.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-23-20-623.csv Completed graceful shutdown