java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:48:38,413 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:48:38,415 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:48:38,428 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:48:38,428 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:48:38,429 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:48:38,431 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:48:38,432 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:48:38,434 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:48:38,435 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:48:38,436 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 10:48:38,436 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 10:48:38,438 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 10:48:38,439 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 10:48:38,440 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 10:48:38,441 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 10:48:38,441 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 10:48:38,443 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 10:48:38,446 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 10:48:38,447 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 10:48:38,449 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 10:48:38,450 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 10:48:38,452 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 10:48:38,461 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-30 10:48:38,481 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:48:38,481 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:48:38,485 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:48:38,485 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:48:38,486 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:48:38,486 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:48:38,487 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:48:38,487 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:48:38,487 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:48:38,489 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:48:38,489 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:48:38,489 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:48:38,489 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:48:38,490 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:48:38,490 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:48:38,490 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:48:38,490 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:48:38,490 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:48:38,491 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:48:38,491 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:48:38,491 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:48:38,491 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:48:38,492 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:48:38,493 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:48:38,493 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:48:38,493 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:48:38,493 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:48:38,494 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:48:38,494 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:48:38,494 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:48:38,494 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 10:48:38,559 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:48:38,574 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:48:38,578 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:48:38,580 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:48:38,580 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:48:38,581 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl [2018-09-30 10:48:38,581 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl' [2018-09-30 10:48:38,632 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:48:38,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:48:38,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:48:38,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:48:38,636 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:48:38,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:48:38" (1/1) ... [2018-09-30 10:48:38,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:48:38" (1/1) ... [2018-09-30 10:48:38,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:48:38,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:48:38,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:48:38,677 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:48:38,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:48:38" (1/1) ... [2018-09-30 10:48:38,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:48:38" (1/1) ... [2018-09-30 10:48:38,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:48:38" (1/1) ... [2018-09-30 10:48:38,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:48:38" (1/1) ... [2018-09-30 10:48:38,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:48:38" (1/1) ... [2018-09-30 10:48:38,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:48:38" (1/1) ... [2018-09-30 10:48:38,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:48:38" (1/1) ... [2018-09-30 10:48:38,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:48:38,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:48:38,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:48:38,698 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:48:38,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:48:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:48:38,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 10:48:38,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 10:48:39,033 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 10:48:39,034 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:48:39 BoogieIcfgContainer [2018-09-30 10:48:39,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:48:39,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:48:39,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:48:39,041 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:48:39,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:48:38" (1/2) ... [2018-09-30 10:48:39,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d7302b and model type count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:48:39, skipping insertion in model container [2018-09-30 10:48:39,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:48:39" (2/2) ... [2018-09-30 10:48:39,049 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_2.i_3.bpl [2018-09-30 10:48:39,060 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:48:39,068 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:48:39,123 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:48:39,124 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:48:39,125 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:48:39,125 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:48:39,125 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:48:39,125 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:48:39,126 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:48:39,126 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:48:39,126 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:48:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 10:48:39,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 10:48:39,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:39,149 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 10:48:39,151 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:39,159 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:39,159 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 10:48:39,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:39,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:39,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:39,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:39,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:39,334 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:48:39,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 10:48:39,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:48:39,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:48:39,351 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:39,352 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 10:48:39,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:39,543 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 10:48:39,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:48:39,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 10:48:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:39,564 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:48:39,564 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:48:39,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:39,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:48:39,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:48:39,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:48:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 10:48:39,631 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 10:48:39,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:39,631 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 10:48:39,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:48:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 10:48:39,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:48:39,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:39,632 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 10:48:39,633 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:39,633 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:39,633 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-30 10:48:39,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:39,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:39,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:39,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:39,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:39,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:39,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:39,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:39,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:39,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:39,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 10:48:39,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:48:39,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:48:39,879 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:39,879 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-30 10:48:39,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:39,944 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:48:39,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:48:39,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 10:48:39,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:39,946 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:48:39,946 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:48:39,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:39,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:48:39,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 10:48:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:48:39,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 10:48:39,950 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 10:48:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:39,950 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 10:48:39,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:48:39,950 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 10:48:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:48:39,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:39,951 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-30 10:48:39,951 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:39,952 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:39,952 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-30 10:48:39,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:39,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:39,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:39,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:39,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:40,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:40,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:40,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:40,043 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:40,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:40,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:40,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:40,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:48:40,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:48:40,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:48:40,093 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:40,093 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-30 10:48:40,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:40,255 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 10:48:40,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:48:40,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 10:48:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:40,257 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:48:40,257 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:48:40,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:48:40,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:48:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:48:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 10:48:40,262 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 10:48:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:40,263 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 10:48:40,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:48:40,263 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 10:48:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:48:40,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:40,264 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 10:48:40,264 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:40,264 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:40,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-30 10:48:40,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:40,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:40,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:40,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:40,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:40,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:40,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:40,496 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:40,516 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:48:40,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:40,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:40,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:40,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:48:40,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:48:40,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:48:40,639 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:40,639 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-30 10:48:40,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:40,721 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 10:48:40,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:48:40,722 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 10:48:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:40,723 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:48:40,723 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:48:40,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:40,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:48:40,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:48:40,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:48:40,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 10:48:40,727 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 10:48:40,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:40,728 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 10:48:40,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:48:40,728 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 10:48:40,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:48:40,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:40,729 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-30 10:48:40,729 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:40,730 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:40,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-30 10:48:40,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:40,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:40,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:40,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:40,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:40,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:40,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:40,845 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:40,860 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:40,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:40,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:41,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:41,035 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:48:41,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:48:41,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:48:41,036 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:41,036 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-30 10:48:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:41,143 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 10:48:41,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:48:41,143 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 10:48:41,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:41,144 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:48:41,144 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:48:41,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:48:41,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:48:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:48:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 10:48:41,149 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 10:48:41,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:41,149 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 10:48:41,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:48:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 10:48:41,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:48:41,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:41,151 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 10:48:41,151 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:41,151 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:41,151 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-30 10:48:41,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:41,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:41,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:41,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:41,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:41,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:41,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:41,273 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:41,283 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:48:41,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:41,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:41,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:41,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:48:41,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:48:41,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:48:41,377 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:41,377 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-30 10:48:41,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:41,926 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 10:48:41,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:48:41,927 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 10:48:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:41,929 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:48:41,929 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:48:41,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:41,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:48:41,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 10:48:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 10:48:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 10:48:41,934 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 10:48:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:41,934 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 10:48:41,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:48:41,934 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 10:48:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:48:41,935 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:41,935 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-30 10:48:41,936 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:41,936 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:41,936 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-30 10:48:41,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:41,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:41,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:41,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:41,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:42,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:42,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:42,029 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:42,042 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:48:42,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:42,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:42,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:42,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:48:42,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:48:42,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:48:42,164 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:42,164 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-30 10:48:42,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:42,239 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 10:48:42,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:48:42,240 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 10:48:42,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:42,241 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:48:42,241 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:48:42,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:48:42,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:48:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:48:42,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 10:48:42,247 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 10:48:42,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:42,247 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 10:48:42,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:48:42,247 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 10:48:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:48:42,248 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:42,248 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 10:48:42,248 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:42,248 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:42,248 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-30 10:48:42,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:42,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:42,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:42,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:42,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:42,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:42,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:42,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:42,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:42,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:42,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:48:42,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:48:42,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:48:42,465 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:42,466 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-30 10:48:42,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:42,553 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 10:48:42,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:48:42,554 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 10:48:42,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:42,555 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:48:42,555 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:48:42,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:42,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:48:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 10:48:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:48:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 10:48:42,561 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 10:48:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:42,561 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 10:48:42,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:48:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 10:48:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:48:42,562 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:42,562 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-30 10:48:42,563 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:42,563 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:42,563 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-30 10:48:42,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:42,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:42,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:42,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:42,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:42,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:42,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:42,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:42,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:42,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:42,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:42,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:42,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:48:42,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:48:42,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:48:42,879 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:42,879 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-30 10:48:43,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:43,044 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 10:48:43,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:48:43,048 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 10:48:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:43,049 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:48:43,049 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:48:43,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:43,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:48:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:48:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:48:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 10:48:43,055 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 10:48:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:43,055 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 10:48:43,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:48:43,056 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 10:48:43,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:48:43,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:43,057 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 10:48:43,057 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:43,057 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:43,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-30 10:48:43,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:43,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:43,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:43,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:43,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:43,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:43,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:43,207 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:43,221 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 10:48:43,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:43,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:43,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:43,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 10:48:43,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:48:43,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:48:43,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:43,308 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-30 10:48:43,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:43,389 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 10:48:43,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:48:43,390 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 10:48:43,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:43,391 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:48:43,391 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:48:43,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:48:43,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:48:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:48:43,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 10:48:43,395 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 10:48:43,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:43,396 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 10:48:43,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:48:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 10:48:43,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:48:43,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:43,397 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-30 10:48:43,397 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:43,397 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-30 10:48:43,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:43,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:43,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:43,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:43,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:43,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:43,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:43,554 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:43,564 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:43,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:43,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:43,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:43,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 10:48:43,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:48:43,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:48:43,664 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:43,665 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-30 10:48:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:43,766 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 10:48:43,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:48:43,766 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 10:48:43,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:43,767 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:48:43,767 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:48:43,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:43,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:48:43,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:48:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:48:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 10:48:43,772 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 10:48:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:43,773 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 10:48:43,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:48:43,773 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 10:48:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:48:43,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:43,774 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-30 10:48:43,774 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:43,774 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:43,774 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-30 10:48:43,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:43,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:43,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:43,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:43,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:43,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:43,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:43,892 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:43,922 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 10:48:43,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:43,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:44,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:44,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 10:48:44,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:48:44,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:48:44,031 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:44,031 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-30 10:48:44,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:44,265 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 10:48:44,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:48:44,267 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 10:48:44,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:44,268 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:48:44,268 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:48:44,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:48:44,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:48:44,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:48:44,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 10:48:44,272 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 10:48:44,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:44,273 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 10:48:44,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:48:44,273 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 10:48:44,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:48:44,274 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:44,274 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-30 10:48:44,274 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:44,275 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:44,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-30 10:48:44,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:44,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:44,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:44,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:44,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:44,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:44,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:44,382 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:44,397 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:48:44,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:44,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:44,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:44,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 10:48:44,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:48:44,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:48:44,601 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:44,601 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-30 10:48:44,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:44,785 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 10:48:44,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:48:44,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 10:48:44,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:44,788 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:48:44,788 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:48:44,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:48:44,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:48:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:48:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 10:48:44,793 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 10:48:44,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:44,794 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 10:48:44,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:48:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 10:48:44,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:48:44,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:44,795 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-30 10:48:44,795 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:44,795 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:44,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-30 10:48:44,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:44,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:44,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:44,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:44,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:44,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:44,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:44,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:44,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:45,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:45,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 10:48:45,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:48:45,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:48:45,078 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:45,078 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-30 10:48:45,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:45,365 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 10:48:45,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:48:45,368 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 10:48:45,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:45,368 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:48:45,368 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:48:45,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:45,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:48:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 10:48:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:48:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 10:48:45,375 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 10:48:45,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:45,375 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 10:48:45,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:48:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 10:48:45,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:48:45,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:45,376 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-30 10:48:45,376 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:45,377 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:45,377 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-30 10:48:45,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:45,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:45,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:45,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:45,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:45,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:45,497 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:45,506 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:45,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:45,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:45,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:45,718 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:45,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 10:48:45,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:48:45,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:48:45,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:45,719 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-30 10:48:45,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:45,925 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 10:48:45,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:48:45,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 10:48:45,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:45,926 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:48:45,926 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:48:45,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:45,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:48:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:48:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:48:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 10:48:45,931 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 10:48:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:45,932 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 10:48:45,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:48:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 10:48:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:48:45,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:45,933 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-30 10:48:45,933 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:45,933 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:45,933 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-30 10:48:45,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:45,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:45,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:45,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:45,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:46,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:46,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:46,107 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:46,140 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 10:48:46,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:46,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:46,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:46,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 10:48:46,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:48:46,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:48:46,326 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:46,326 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-30 10:48:46,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:46,458 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 10:48:46,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:48:46,460 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 10:48:46,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:46,461 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:48:46,461 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:48:46,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:46,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:48:46,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:48:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:48:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 10:48:46,466 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 10:48:46,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:46,466 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 10:48:46,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:48:46,466 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 10:48:46,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:48:46,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:46,467 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-30 10:48:46,467 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:46,467 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:46,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-30 10:48:46,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:46,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:46,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:46,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:46,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:46,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:46,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:46,779 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:46,819 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:46,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:46,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:47,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:47,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 10:48:47,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:48:47,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:48:47,046 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:47,046 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-30 10:48:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:47,283 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 10:48:47,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:48:47,283 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 10:48:47,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:47,285 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:48:47,285 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:48:47,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:47,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:48:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 10:48:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 10:48:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 10:48:47,291 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 10:48:47,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:47,291 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 10:48:47,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:48:47,291 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 10:48:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:48:47,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:47,292 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-30 10:48:47,293 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:47,293 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:47,293 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-30 10:48:47,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:47,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:47,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:47,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:47,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:47,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:47,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:47,509 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:47,525 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 10:48:47,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:47,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:48,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:48,021 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 10:48:48,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:48:48,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:48:48,022 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:48,022 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-30 10:48:48,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:48,212 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 10:48:48,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:48:48,212 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 10:48:48,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:48,213 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:48:48,213 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:48:48,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:48,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:48:48,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 10:48:48,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:48:48,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 10:48:48,218 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 10:48:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:48,218 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 10:48:48,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:48:48,218 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 10:48:48,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:48:48,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:48,219 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-30 10:48:48,219 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:48,220 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:48,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-30 10:48:48,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:48,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:48,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:48,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:48,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:48,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:48,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:48,346 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:48,376 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:48:48,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:48,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:48,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:48,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 10:48:48,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:48:48,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:48:48,627 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:48,627 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-30 10:48:49,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:49,038 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 10:48:49,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:48:49,039 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 10:48:49,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:49,040 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:48:49,040 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:48:49,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:48:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:48:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:48:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 10:48:49,044 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 10:48:49,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:49,044 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 10:48:49,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:48:49,044 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 10:48:49,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:48:49,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:49,045 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-30 10:48:49,045 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:49,045 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-30 10:48:49,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:49,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:49,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:49,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:49,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:49,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:49,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:49,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:49,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:49,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:49,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 10:48:49,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:48:49,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:48:49,331 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:49,331 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-30 10:48:49,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:49,511 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 10:48:49,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:48:49,512 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 10:48:49,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:49,513 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:48:49,513 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:48:49,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:49,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:48:49,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 10:48:49,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 10:48:49,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 10:48:49,519 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 10:48:49,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:49,520 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 10:48:49,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:48:49,520 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 10:48:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:48:49,521 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:49,521 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-30 10:48:49,521 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:49,521 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:49,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-30 10:48:49,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:49,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:49,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:49,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:49,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:50,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:50,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:50,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:50,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:50,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:50,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:50,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:50,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 10:48:50,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:48:50,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:48:50,259 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:50,259 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-30 10:48:50,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:50,390 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 10:48:50,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:48:50,391 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 10:48:50,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:50,392 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:48:50,392 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:48:50,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:50,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:48:50,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 10:48:50,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 10:48:50,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 10:48:50,397 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 10:48:50,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:50,397 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 10:48:50,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:48:50,398 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 10:48:50,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 10:48:50,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:50,398 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-30 10:48:50,399 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:50,399 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:50,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-30 10:48:50,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:50,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:50,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:50,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:50,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:50,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:50,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:50,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:50,630 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 10:48:50,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:50,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:50,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:50,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 10:48:50,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:48:50,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:48:50,833 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:50,833 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-30 10:48:51,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:51,032 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 10:48:51,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:48:51,035 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 10:48:51,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:51,036 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:48:51,036 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:48:51,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:48:51,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 10:48:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:48:51,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 10:48:51,041 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 10:48:51,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:51,042 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 10:48:51,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:48:51,042 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 10:48:51,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:48:51,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:51,043 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-30 10:48:51,043 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:51,043 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:51,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-30 10:48:51,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:51,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:51,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:51,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:51,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:51,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:51,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:51,275 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:51,292 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:51,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:51,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:51,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:51,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 10:48:51,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:48:51,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:48:51,434 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:51,434 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-30 10:48:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:51,843 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 10:48:51,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:48:51,843 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 10:48:51,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:51,844 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:48:51,844 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:48:51,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:51,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:48:51,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 10:48:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:48:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 10:48:51,849 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 10:48:51,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:51,850 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 10:48:51,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:48:51,850 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 10:48:51,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:48:51,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:51,850 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-30 10:48:51,851 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:51,851 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:51,851 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-30 10:48:51,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:51,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:51,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:51,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:51,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:52,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:52,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:52,173 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:52,220 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 10:48:52,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:52,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:52,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:52,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 10:48:52,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:48:52,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:48:52,414 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:52,414 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-30 10:48:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:52,752 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 10:48:52,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:48:52,753 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 10:48:52,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:52,754 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:48:52,754 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:48:52,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:52,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:48:52,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 10:48:52,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 10:48:52,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 10:48:52,758 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-30 10:48:52,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:52,758 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 10:48:52,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:48:52,758 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 10:48:52,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:48:52,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:52,759 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-30 10:48:52,759 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:52,760 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:52,760 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-30 10:48:52,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:52,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:52,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:52,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:52,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:53,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:53,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:53,192 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:53,214 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 10:48:53,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:53,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:53,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:53,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 10:48:53,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:48:53,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:48:53,348 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:53,349 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-30 10:48:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:53,518 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 10:48:53,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:48:53,518 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-30 10:48:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:53,519 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:48:53,519 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:48:53,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:53,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:48:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 10:48:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 10:48:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 10:48:53,524 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-30 10:48:53,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:53,525 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 10:48:53,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:48:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 10:48:53,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 10:48:53,525 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:53,526 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-30 10:48:53,526 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:53,526 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:53,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-30 10:48:53,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:53,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:53,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:53,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:53,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:53,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:53,711 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:53,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:53,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:53,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:53,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 10:48:53,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:48:53,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:48:53,912 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:53,912 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-30 10:48:54,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:54,086 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 10:48:54,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:48:54,086 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 10:48:54,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:54,087 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:48:54,087 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:48:54,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:54,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:48:54,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 10:48:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:48:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 10:48:54,091 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-30 10:48:54,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:54,091 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 10:48:54,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:48:54,091 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 10:48:54,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:48:54,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:54,092 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-30 10:48:54,092 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:54,093 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:54,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-30 10:48:54,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:54,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:54,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:54,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:54,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:54,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:54,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:54,701 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:54,716 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:54,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:54,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:54,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:54,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 10:48:54,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:48:54,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:48:54,886 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:54,887 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-30 10:48:55,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:55,039 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 10:48:55,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:48:55,039 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 10:48:55,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:55,040 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:48:55,040 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:48:55,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:55,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:48:55,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:48:55,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:48:55,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 10:48:55,043 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-30 10:48:55,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:55,043 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 10:48:55,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:48:55,043 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 10:48:55,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:48:55,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:55,044 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-30 10:48:55,044 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:55,045 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:55,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-30 10:48:55,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:55,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:55,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:55,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:55,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:55,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:55,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:55,341 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:55,363 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 10:48:55,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:55,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:55,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:55,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 10:48:55,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:48:55,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:48:55,478 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:55,478 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-30 10:48:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:55,668 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 10:48:55,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:48:55,668 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 10:48:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:55,669 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:48:55,669 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:48:55,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:55,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:48:55,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:48:55,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:48:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 10:48:55,672 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-30 10:48:55,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:55,672 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 10:48:55,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:48:55,672 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 10:48:55,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:48:55,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:55,673 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-30 10:48:55,673 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:55,673 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:55,673 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-30 10:48:55,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:55,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:55,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:55,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:55,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:56,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:56,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:56,148 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:56,165 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:56,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:56,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:56,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:56,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 10:48:56,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:48:56,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:48:56,303 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:56,303 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-30 10:48:56,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:56,603 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 10:48:56,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:48:56,604 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-30 10:48:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:56,605 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:48:56,605 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 10:48:56,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 10:48:56,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 10:48:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 10:48:56,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 10:48:56,609 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-30 10:48:56,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:56,609 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 10:48:56,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:48:56,610 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 10:48:56,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:48:56,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:56,610 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-30 10:48:56,611 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:56,611 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:56,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-30 10:48:56,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:56,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:56,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:56,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:56,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:56,824 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:56,824 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:56,840 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:56,877 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 10:48:56,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:56,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:57,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:57,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 10:48:57,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:48:57,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:48:57,078 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:57,079 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-30 10:48:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:57,238 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 10:48:57,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:48:57,239 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-30 10:48:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:57,240 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:48:57,240 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 10:48:57,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 10:48:57,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 10:48:57,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 10:48:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 10:48:57,243 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-30 10:48:57,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:57,243 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 10:48:57,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:48:57,243 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 10:48:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 10:48:57,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:57,244 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-30 10:48:57,244 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:57,244 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:57,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-30 10:48:57,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:57,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:57,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:57,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:57,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:57,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:57,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:57,504 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:57,533 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 10:48:57,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:57,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:57,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:57,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 10:48:57,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:48:57,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:48:57,712 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:57,712 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-30 10:48:57,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:57,833 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 10:48:57,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:48:57,833 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-30 10:48:57,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:57,833 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:48:57,834 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 10:48:57,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:57,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 10:48:57,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 10:48:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 10:48:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 10:48:57,836 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-30 10:48:57,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:57,836 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 10:48:57,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:48:57,836 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 10:48:57,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 10:48:57,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:57,837 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-30 10:48:57,837 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:57,837 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:57,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-30 10:48:57,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:57,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:57,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:57,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:57,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:58,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:58,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:58,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:58,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:59,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:59,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 10:48:59,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:48:59,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:48:59,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:59,085 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-30 10:48:59,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:59,296 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 10:48:59,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:48:59,297 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-30 10:48:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:59,298 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:48:59,298 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 10:48:59,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:59,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 10:48:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 10:48:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 10:48:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 10:48:59,301 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-30 10:48:59,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:59,301 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 10:48:59,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:48:59,301 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 10:48:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:48:59,301 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:59,301 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-30 10:48:59,302 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:59,302 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:59,302 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-30 10:48:59,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:59,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:59,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:59,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:59,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:59,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:59,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:59,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:59,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:59,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:59,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:59,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:59,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 10:48:59,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:48:59,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:48:59,934 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:59,934 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-30 10:49:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:00,170 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 10:49:00,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:49:00,171 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-30 10:49:00,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:00,172 INFO L225 Difference]: With dead ends: 73 [2018-09-30 10:49:00,172 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 10:49:00,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:00,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 10:49:00,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 10:49:00,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 10:49:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 10:49:00,176 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-30 10:49:00,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:00,176 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 10:49:00,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:49:00,177 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 10:49:00,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 10:49:00,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:00,177 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-30 10:49:00,177 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:00,178 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:00,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-30 10:49:00,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:00,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:00,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:00,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:00,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:01,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:01,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:01,254 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:01,290 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 10:49:01,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:01,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:01,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:01,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 10:49:01,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:49:01,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:49:01,416 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:01,416 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-30 10:49:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:01,594 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 10:49:01,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:49:01,595 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-30 10:49:01,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:01,596 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:49:01,596 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 10:49:01,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:01,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 10:49:01,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 10:49:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:49:01,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 10:49:01,598 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-30 10:49:01,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:01,598 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 10:49:01,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:49:01,599 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 10:49:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 10:49:01,599 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:01,599 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-30 10:49:01,599 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:01,600 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:01,600 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-30 10:49:01,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:01,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:01,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:01,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:01,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:01,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:01,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:01,939 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:01,958 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:01,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:01,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:02,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:02,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 10:49:02,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:49:02,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:49:02,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:02,086 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-30 10:49:02,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:02,347 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 10:49:02,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:49:02,347 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-30 10:49:02,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:02,348 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:49:02,348 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 10:49:02,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:02,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 10:49:02,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 10:49:02,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 10:49:02,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 10:49:02,351 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-30 10:49:02,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:02,351 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 10:49:02,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:49:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 10:49:02,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:49:02,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:02,352 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-30 10:49:02,352 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:02,352 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:02,352 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-30 10:49:02,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:02,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:02,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:02,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:02,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:02,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:02,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:02,590 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:02,625 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 10:49:02,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:02,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:02,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:02,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 10:49:02,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:49:02,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:49:02,803 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:02,803 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-30 10:49:03,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:03,034 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 10:49:03,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:49:03,034 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-30 10:49:03,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:03,035 INFO L225 Difference]: With dead ends: 79 [2018-09-30 10:49:03,036 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 10:49:03,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:03,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 10:49:03,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 10:49:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 10:49:03,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 10:49:03,039 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-30 10:49:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:03,039 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 10:49:03,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:49:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 10:49:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 10:49:03,040 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:03,040 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-30 10:49:03,041 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:03,041 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:03,041 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-30 10:49:03,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:03,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:03,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:03,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:03,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:03,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:03,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:03,372 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:03,436 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 10:49:03,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:03,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:04,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:04,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 10:49:04,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:49:04,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:49:04,086 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:04,086 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-30 10:49:04,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:04,323 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 10:49:04,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:49:04,323 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-30 10:49:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:04,324 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:49:04,324 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 10:49:04,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 10:49:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 10:49:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 10:49:04,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 10:49:04,327 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-30 10:49:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:04,328 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 10:49:04,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:49:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 10:49:04,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 10:49:04,328 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:04,329 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-30 10:49:04,329 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:04,329 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:04,329 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-30 10:49:04,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:04,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:04,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:04,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:04,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:04,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:04,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:04,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:04,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:04,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:04,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 10:49:04,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:49:04,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:49:04,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:04,958 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-30 10:49:05,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:05,240 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 10:49:05,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:49:05,241 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-30 10:49:05,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:05,242 INFO L225 Difference]: With dead ends: 83 [2018-09-30 10:49:05,242 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 10:49:05,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:05,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 10:49:05,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 10:49:05,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 10:49:05,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 10:49:05,245 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-30 10:49:05,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:05,245 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 10:49:05,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:49:05,246 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 10:49:05,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 10:49:05,246 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:05,246 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-30 10:49:05,247 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:05,247 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:05,247 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-30 10:49:05,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:05,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:05,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:05,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:05,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:05,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:05,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:05,552 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:05,573 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:05,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:05,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:05,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:05,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 10:49:05,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:49:05,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:49:05,737 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:05,737 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-30 10:49:05,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:05,997 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 10:49:05,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:49:05,998 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-30 10:49:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:05,999 INFO L225 Difference]: With dead ends: 85 [2018-09-30 10:49:05,999 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 10:49:05,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:05,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 10:49:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 10:49:06,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 10:49:06,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 10:49:06,002 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-30 10:49:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:06,003 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 10:49:06,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:49:06,003 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 10:49:06,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 10:49:06,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:06,004 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-30 10:49:06,004 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:06,004 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:06,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-30 10:49:06,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:06,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:06,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:06,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:06,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:06,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:06,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:06,463 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:06,500 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 10:49:06,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:06,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:06,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:06,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 10:49:06,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:49:06,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:49:06,656 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:06,657 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-30 10:49:06,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:06,895 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 10:49:06,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:49:06,895 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-30 10:49:06,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:06,896 INFO L225 Difference]: With dead ends: 87 [2018-09-30 10:49:06,896 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 10:49:06,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:06,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 10:49:06,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 10:49:06,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 10:49:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 10:49:06,898 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-30 10:49:06,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:06,899 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 10:49:06,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:49:06,899 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 10:49:06,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 10:49:06,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:06,899 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-30 10:49:06,900 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:06,900 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:06,900 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-30 10:49:06,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:06,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:06,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:06,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:06,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:07,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:07,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:07,534 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:07,555 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:07,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:07,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:07,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:07,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 10:49:07,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:49:07,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:49:07,707 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:07,707 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-30 10:49:08,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:08,214 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 10:49:08,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:49:08,215 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-30 10:49:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:08,215 INFO L225 Difference]: With dead ends: 89 [2018-09-30 10:49:08,216 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 10:49:08,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:08,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 10:49:08,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 10:49:08,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 10:49:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 10:49:08,219 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-30 10:49:08,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:08,219 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 10:49:08,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:49:08,219 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 10:49:08,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 10:49:08,220 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:08,220 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-30 10:49:08,220 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:08,220 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:08,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-30 10:49:08,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:08,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:08,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:08,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:08,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:08,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:08,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:08,520 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:08,560 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 10:49:08,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:08,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:08,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:08,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 10:49:08,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:49:08,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:49:08,809 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:08,809 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-30 10:49:09,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:09,138 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 10:49:09,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:49:09,138 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-30 10:49:09,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:09,139 INFO L225 Difference]: With dead ends: 91 [2018-09-30 10:49:09,139 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 10:49:09,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 10:49:09,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 10:49:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 10:49:09,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 10:49:09,142 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-30 10:49:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:09,142 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 10:49:09,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:49:09,142 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 10:49:09,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 10:49:09,143 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:09,143 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-30 10:49:09,143 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:09,143 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:09,143 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-30 10:49:09,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:09,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:09,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:09,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:09,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:09,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:09,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:09,404 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:09,444 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 10:49:09,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:09,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:09,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:09,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 10:49:09,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:49:09,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:49:09,642 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:09,642 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-30 10:49:09,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:09,832 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 10:49:09,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:49:09,832 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-30 10:49:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:09,833 INFO L225 Difference]: With dead ends: 93 [2018-09-30 10:49:09,833 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 10:49:09,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:09,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 10:49:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 10:49:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 10:49:09,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 10:49:09,836 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-30 10:49:09,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:09,837 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 10:49:09,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:49:09,837 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 10:49:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 10:49:09,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:09,837 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-30 10:49:09,837 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:09,838 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:09,838 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-30 10:49:09,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:09,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:09,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:09,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:09,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:11,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:11,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:11,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:11,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:11,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:11,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 10:49:11,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:49:11,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:49:11,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:11,280 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-30 10:49:11,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:11,740 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 10:49:11,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:49:11,740 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-30 10:49:11,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:11,741 INFO L225 Difference]: With dead ends: 95 [2018-09-30 10:49:11,741 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 10:49:11,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 10:49:11,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 10:49:11,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 10:49:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 10:49:11,744 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-30 10:49:11,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:11,745 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 10:49:11,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:49:11,745 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 10:49:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 10:49:11,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:11,746 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-30 10:49:11,746 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:11,746 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:11,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-30 10:49:11,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:11,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:11,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:11,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:11,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:12,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:12,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:12,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:12,158 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:12,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:12,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:12,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:12,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 10:49:12,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:49:12,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:49:12,511 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:12,511 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-30 10:49:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:12,928 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 10:49:12,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:49:12,929 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-30 10:49:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:12,929 INFO L225 Difference]: With dead ends: 97 [2018-09-30 10:49:12,929 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 10:49:12,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:12,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 10:49:12,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 10:49:12,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 10:49:12,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 10:49:12,935 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-30 10:49:12,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:12,935 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 10:49:12,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:49:12,935 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 10:49:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 10:49:12,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:12,936 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-30 10:49:12,936 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:12,936 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:12,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-30 10:49:12,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:12,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:12,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:12,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:12,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:13,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:13,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:13,230 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:13,270 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 10:49:13,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:13,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:13,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:13,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 10:49:13,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:49:13,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:49:13,466 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:13,466 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-30 10:49:13,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:13,730 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 10:49:13,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:49:13,731 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-30 10:49:13,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:13,731 INFO L225 Difference]: With dead ends: 99 [2018-09-30 10:49:13,731 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 10:49:13,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 10:49:13,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 10:49:13,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 10:49:13,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 10:49:13,734 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-30 10:49:13,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:13,734 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 10:49:13,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:49:13,734 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 10:49:13,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 10:49:13,735 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:13,735 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-30 10:49:13,735 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:13,735 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:13,735 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-30 10:49:13,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:13,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:13,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:13,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:13,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:14,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:14,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:14,098 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:14,126 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:14,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:14,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:14,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:14,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 10:49:14,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:49:14,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:49:14,349 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:14,349 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-30 10:49:14,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:14,714 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 10:49:14,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:49:14,714 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-30 10:49:14,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:14,715 INFO L225 Difference]: With dead ends: 101 [2018-09-30 10:49:14,715 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 10:49:14,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:14,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 10:49:14,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 10:49:14,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 10:49:14,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 10:49:14,719 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-30 10:49:14,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:14,719 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 10:49:14,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:49:14,719 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 10:49:14,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 10:49:14,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:14,720 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-30 10:49:14,720 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:14,720 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:14,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-30 10:49:14,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:14,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:14,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:14,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:14,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:15,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:15,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:15,050 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:15,092 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 10:49:15,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:15,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:15,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:15,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 10:49:15,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:49:15,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:49:15,267 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:15,267 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-30 10:49:15,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:15,529 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 10:49:15,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:49:15,530 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-30 10:49:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:15,530 INFO L225 Difference]: With dead ends: 103 [2018-09-30 10:49:15,530 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 10:49:15,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:15,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 10:49:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 10:49:15,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 10:49:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 10:49:15,534 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-30 10:49:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:15,534 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 10:49:15,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:49:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 10:49:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 10:49:15,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:15,535 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-30 10:49:15,535 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:15,535 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:15,535 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-30 10:49:15,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:15,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:15,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:15,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:15,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:16,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:16,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:16,178 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:16,222 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 10:49:16,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:16,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:16,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:16,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 10:49:16,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:49:16,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:49:16,549 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:16,549 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-30 10:49:16,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:16,910 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 10:49:16,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:49:16,910 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-30 10:49:16,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:16,911 INFO L225 Difference]: With dead ends: 105 [2018-09-30 10:49:16,911 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 10:49:16,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 10:49:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 10:49:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 10:49:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 10:49:16,914 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-30 10:49:16,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:16,915 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 10:49:16,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:49:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 10:49:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 10:49:16,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:16,915 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-30 10:49:16,916 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:16,916 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:16,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-30 10:49:16,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:16,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:16,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:16,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:16,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:17,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:17,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:17,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:17,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:17,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:17,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 10:49:17,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:49:17,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:49:17,408 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:17,408 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-30 10:49:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:17,715 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 10:49:17,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:49:17,715 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-30 10:49:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:17,716 INFO L225 Difference]: With dead ends: 107 [2018-09-30 10:49:17,716 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 10:49:17,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:17,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 10:49:17,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 10:49:17,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 10:49:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 10:49:17,719 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-30 10:49:17,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:17,720 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 10:49:17,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:49:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 10:49:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 10:49:17,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:17,721 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-30 10:49:17,721 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:17,721 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:17,721 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-30 10:49:17,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:17,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:17,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:17,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:17,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:18,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:18,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:18,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:18,463 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:18,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:18,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:19,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:19,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 10:49:19,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:49:19,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:49:19,555 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:19,555 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-30 10:49:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:20,044 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 10:49:20,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:49:20,045 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-30 10:49:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:20,046 INFO L225 Difference]: With dead ends: 109 [2018-09-30 10:49:20,046 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 10:49:20,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:20,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 10:49:20,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 10:49:20,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 10:49:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 10:49:20,051 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-30 10:49:20,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:20,051 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 10:49:20,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:49:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 10:49:20,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 10:49:20,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:20,052 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-30 10:49:20,052 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:20,053 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:20,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-30 10:49:20,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:20,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:20,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:20,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:20,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:20,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:20,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:20,460 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:20,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 10:49:20,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:20,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:20,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:20,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 10:49:20,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:49:20,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:49:20,952 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:20,952 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-30 10:49:21,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:21,322 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 10:49:21,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:49:21,322 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-30 10:49:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:21,323 INFO L225 Difference]: With dead ends: 111 [2018-09-30 10:49:21,323 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 10:49:21,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:21,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 10:49:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 10:49:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 10:49:21,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 10:49:21,326 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-30 10:49:21,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:21,326 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 10:49:21,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:49:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 10:49:21,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 10:49:21,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:21,327 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-30 10:49:21,327 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:21,327 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:21,328 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-30 10:49:21,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:21,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:21,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:21,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:21,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:21,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:21,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:21,948 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:21,998 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:21,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:22,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:22,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:22,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 10:49:22,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:49:22,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:49:22,220 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:22,220 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-30 10:49:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:22,601 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 10:49:22,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:49:22,601 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-30 10:49:22,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:22,602 INFO L225 Difference]: With dead ends: 113 [2018-09-30 10:49:22,602 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 10:49:22,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:22,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 10:49:22,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 10:49:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 10:49:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 10:49:22,605 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-30 10:49:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:22,605 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 10:49:22,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:49:22,606 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 10:49:22,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 10:49:22,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:22,606 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-30 10:49:22,606 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:22,606 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:22,606 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-30 10:49:22,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:22,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:22,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:22,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:22,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:23,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:23,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:23,309 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:23,435 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 10:49:23,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:23,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:23,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:23,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 10:49:23,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:49:23,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:49:23,680 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:23,680 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-30 10:49:23,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:23,942 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 10:49:23,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:49:23,943 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-30 10:49:23,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:23,944 INFO L225 Difference]: With dead ends: 115 [2018-09-30 10:49:23,944 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 10:49:23,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:23,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 10:49:23,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 10:49:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 10:49:23,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 10:49:23,947 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-30 10:49:23,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:23,947 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 10:49:23,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:49:23,947 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 10:49:23,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 10:49:23,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:23,948 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-30 10:49:23,948 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:23,948 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:23,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-30 10:49:23,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:23,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:23,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:23,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:23,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:24,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:24,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:24,310 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:24,363 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 10:49:24,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:24,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:24,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:24,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 10:49:24,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:49:24,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:49:24,668 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:24,668 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-30 10:49:25,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:25,132 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 10:49:25,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:49:25,132 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-30 10:49:25,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:25,133 INFO L225 Difference]: With dead ends: 117 [2018-09-30 10:49:25,133 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 10:49:25,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:25,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 10:49:25,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 10:49:25,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 10:49:25,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 10:49:25,137 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-30 10:49:25,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:25,137 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 10:49:25,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:49:25,138 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 10:49:25,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 10:49:25,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:25,138 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-30 10:49:25,139 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:25,139 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:25,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-30 10:49:25,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:25,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:25,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:25,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:25,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:25,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:25,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:25,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:25,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:25,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:25,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 10:49:25,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:49:25,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:49:25,856 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:25,856 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-30 10:49:26,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:26,801 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 10:49:26,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:49:26,802 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-30 10:49:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:26,802 INFO L225 Difference]: With dead ends: 119 [2018-09-30 10:49:26,803 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 10:49:26,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:26,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 10:49:26,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 10:49:26,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 10:49:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-30 10:49:26,806 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-30 10:49:26,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:26,806 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-30 10:49:26,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:49:26,807 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-30 10:49:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 10:49:26,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:26,807 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-30 10:49:26,808 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:26,808 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:26,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-30 10:49:26,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:26,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:26,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:26,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:26,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:27,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:27,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:27,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:27,200 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:27,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:27,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:27,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:27,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 10:49:27,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:49:27,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:49:27,416 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:27,416 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-30 10:49:27,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:27,840 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 10:49:27,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:49:27,840 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-30 10:49:27,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:27,841 INFO L225 Difference]: With dead ends: 121 [2018-09-30 10:49:27,841 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 10:49:27,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 10:49:27,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 10:49:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 10:49:27,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 10:49:27,843 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-30 10:49:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:27,843 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 10:49:27,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:49:27,844 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 10:49:27,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 10:49:27,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:27,844 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-30 10:49:27,844 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:27,844 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:27,845 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-30 10:49:27,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:27,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:27,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:27,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:27,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:28,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:28,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:28,209 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:28,265 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 10:49:28,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:28,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:28,753 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:28,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 10:49:28,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:49:28,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:49:28,754 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:28,754 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-30 10:49:29,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:29,055 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 10:49:29,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:49:29,055 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-30 10:49:29,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:29,056 INFO L225 Difference]: With dead ends: 123 [2018-09-30 10:49:29,056 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 10:49:29,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:29,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 10:49:29,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 10:49:29,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 10:49:29,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-30 10:49:29,059 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-30 10:49:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:29,059 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-30 10:49:29,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:49:29,060 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-30 10:49:29,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 10:49:29,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:29,060 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-30 10:49:29,061 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:29,061 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:29,061 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-30 10:49:29,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:29,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:29,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:29,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:29,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:31,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:31,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:31,373 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:31,406 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:31,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:31,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:32,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:32,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 10:49:32,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 10:49:32,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 10:49:32,826 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:32,826 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-30 10:49:33,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:33,269 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 10:49:33,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:49:33,269 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-30 10:49:33,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:33,270 INFO L225 Difference]: With dead ends: 125 [2018-09-30 10:49:33,270 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 10:49:33,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:33,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 10:49:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 10:49:33,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 10:49:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 10:49:33,273 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-30 10:49:33,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:33,273 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 10:49:33,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 10:49:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 10:49:33,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 10:49:33,274 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:33,274 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-30 10:49:33,275 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:33,275 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:33,275 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-30 10:49:33,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:33,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:33,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:33,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:33,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:33,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:33,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:33,696 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:33,749 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 10:49:33,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:33,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:34,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:34,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 10:49:34,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:49:34,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:49:34,132 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:34,132 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-30 10:49:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:34,616 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 10:49:34,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:49:34,617 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-30 10:49:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:34,617 INFO L225 Difference]: With dead ends: 127 [2018-09-30 10:49:34,618 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 10:49:34,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 10:49:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 10:49:34,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 10:49:34,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-30 10:49:34,621 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-30 10:49:34,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:34,621 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-30 10:49:34,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:49:34,621 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-30 10:49:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 10:49:34,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:34,622 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-30 10:49:34,622 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:34,622 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:34,622 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-30 10:49:34,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:34,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:34,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:34,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:34,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:35,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:35,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:35,092 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:35,149 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 10:49:35,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:35,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:35,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:35,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 10:49:35,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 10:49:35,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 10:49:35,400 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:35,400 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-30 10:49:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:35,890 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 10:49:35,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:49:35,890 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-30 10:49:35,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:35,891 INFO L225 Difference]: With dead ends: 129 [2018-09-30 10:49:35,891 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 10:49:35,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 10:49:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 10:49:35,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 10:49:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 10:49:35,894 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-30 10:49:35,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:35,894 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 10:49:35,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 10:49:35,894 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 10:49:35,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 10:49:35,895 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:35,895 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-30 10:49:35,895 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:35,896 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:35,896 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-30 10:49:35,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:35,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:35,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:35,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:35,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:38,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:38,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:38,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:38,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:38,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:38,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 10:49:38,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:49:38,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:49:38,703 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:38,703 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-30 10:49:39,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:39,158 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 10:49:39,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 10:49:39,159 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-30 10:49:39,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:39,160 INFO L225 Difference]: With dead ends: 131 [2018-09-30 10:49:39,160 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 10:49:39,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:39,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 10:49:39,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 10:49:39,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 10:49:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-30 10:49:39,163 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-30 10:49:39,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:39,163 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-30 10:49:39,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:49:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-30 10:49:39,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 10:49:39,164 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:39,164 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-30 10:49:39,164 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:39,165 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:39,165 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-30 10:49:39,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:39,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:39,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:39,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:39,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:40,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:40,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:40,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:40,293 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:40,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:40,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:40,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:40,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:40,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 10:49:40,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:49:40,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:49:40,535 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:40,535 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-30 10:49:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:40,939 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 10:49:40,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:49:40,939 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-30 10:49:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:40,940 INFO L225 Difference]: With dead ends: 133 [2018-09-30 10:49:40,940 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 10:49:40,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 10:49:40,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 10:49:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 10:49:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 10:49:40,943 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-30 10:49:40,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:40,943 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 10:49:40,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:49:40,943 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 10:49:40,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 10:49:40,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:40,943 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-30 10:49:40,944 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:40,944 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:40,944 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-30 10:49:40,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:40,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:40,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:40,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:40,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:41,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:41,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:41,326 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:41,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 10:49:41,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:41,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:41,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:41,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 10:49:41,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:49:41,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:49:41,676 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:41,676 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-30 10:49:42,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:42,281 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 10:49:42,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 10:49:42,281 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-30 10:49:42,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:42,282 INFO L225 Difference]: With dead ends: 135 [2018-09-30 10:49:42,282 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 10:49:42,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:42,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 10:49:42,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 10:49:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 10:49:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-30 10:49:42,285 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-30 10:49:42,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:42,285 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-30 10:49:42,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:49:42,286 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-30 10:49:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 10:49:42,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:42,286 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-30 10:49:42,287 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:42,287 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:42,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-30 10:49:42,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:42,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:42,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:42,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:42,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:42,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:42,612 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 [2018-09-30 10:49:42,621 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:42,653 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:42,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:42,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:42,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:42,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 10:49:42,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 10:49:42,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 10:49:42,914 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:42,915 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-30 10:49:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:44,236 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 10:49:44,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:49:44,236 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-30 10:49:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:44,237 INFO L225 Difference]: With dead ends: 137 [2018-09-30 10:49:44,237 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 10:49:44,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:44,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 10:49:44,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 10:49:44,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 10:49:44,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 10:49:44,239 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-30 10:49:44,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:44,240 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 10:49:44,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 10:49:44,240 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 10:49:44,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 10:49:44,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:44,240 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-30 10:49:44,241 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:44,241 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:44,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-30 10:49:44,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:44,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:44,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:44,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:44,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:44,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:44,706 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 [2018-09-30 10:49:44,713 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:44,776 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 10:49:44,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:44,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:45,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:45,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 10:49:45,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:49:45,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:49:45,057 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:45,057 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-30 10:49:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:45,619 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 10:49:45,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 10:49:45,619 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-30 10:49:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:45,620 INFO L225 Difference]: With dead ends: 139 [2018-09-30 10:49:45,620 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 10:49:45,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:45,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 10:49:45,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 10:49:45,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 10:49:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-30 10:49:45,624 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-30 10:49:45,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:45,624 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-30 10:49:45,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:49:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-30 10:49:45,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 10:49:45,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:45,625 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-30 10:49:45,625 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:45,625 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:45,625 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-30 10:49:45,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:45,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:45,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:45,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:45,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:45,977 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:45,977 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 [2018-09-30 10:49:45,983 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:46,047 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 10:49:46,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:46,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:46,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:46,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 10:49:46,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 10:49:46,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 10:49:46,481 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:46,481 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-30 10:49:46,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:46,975 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 10:49:46,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:49:46,975 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-30 10:49:46,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:46,976 INFO L225 Difference]: With dead ends: 141 [2018-09-30 10:49:46,976 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 10:49:46,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:46,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 10:49:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 10:49:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 10:49:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 10:49:46,978 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-30 10:49:46,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:46,978 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 10:49:46,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 10:49:46,979 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 10:49:46,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 10:49:46,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:46,979 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-30 10:49:46,979 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:46,979 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:46,980 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-30 10:49:46,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:46,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:46,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:46,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:46,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:47,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:47,540 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 [2018-09-30 10:49:47,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:47,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:47,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:47,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 10:49:47,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:49:47,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:49:47,846 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:47,846 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-30 10:49:48,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:48,503 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 10:49:48,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:49:48,504 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-30 10:49:48,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:48,504 INFO L225 Difference]: With dead ends: 143 [2018-09-30 10:49:48,504 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 10:49:48,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:48,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 10:49:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 10:49:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 10:49:48,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-30 10:49:48,509 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-30 10:49:48,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:48,509 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-30 10:49:48,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:49:48,509 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-30 10:49:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 10:49:48,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:48,510 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-30 10:49:48,511 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:48,511 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:48,511 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-30 10:49:48,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:48,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:48,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:48,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:48,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:49,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:49,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:49:49,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:49,118 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:49,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:49,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:49,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:49,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 10:49:49,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:49:49,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:49:49,375 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:49,375 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-30 10:49:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:49,995 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 10:49:49,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:49:49,995 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-30 10:49:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:49,996 INFO L225 Difference]: With dead ends: 145 [2018-09-30 10:49:49,996 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 10:49:49,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 10:49:49,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 10:49:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 10:49:49,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 10:49:49,999 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-30 10:49:49,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:49,999 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 10:49:49,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:49:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 10:49:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 10:49:50,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:50,000 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-30 10:49:50,000 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:50,000 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:50,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-30 10:49:50,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:50,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:50,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:50,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:50,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:50,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:50,379 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 [2018-09-30 10:49:50,386 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:50,473 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 10:49:50,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:50,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:51,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:51,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 10:49:51,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:49:51,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:49:51,056 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:51,056 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-30 10:49:51,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:51,710 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 10:49:51,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 10:49:51,710 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-30 10:49:51,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:51,711 INFO L225 Difference]: With dead ends: 147 [2018-09-30 10:49:51,711 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 10:49:51,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:51,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 10:49:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 10:49:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 10:49:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-30 10:49:51,715 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-30 10:49:51,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:51,715 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-30 10:49:51,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:49:51,715 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-30 10:49:51,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 10:49:51,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:51,716 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-30 10:49:51,716 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:51,716 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:51,716 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-30 10:49:51,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:51,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:51,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:51,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:51,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:52,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:52,133 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 [2018-09-30 10:49:52,140 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:52,175 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:52,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:52,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:52,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:52,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 10:49:52,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 10:49:52,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 10:49:52,659 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:52,659 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-30 10:49:53,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:53,333 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 10:49:53,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:49:53,333 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-30 10:49:53,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:53,334 INFO L225 Difference]: With dead ends: 149 [2018-09-30 10:49:53,334 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 10:49:53,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:53,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 10:49:53,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 10:49:53,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 10:49:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 10:49:53,337 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-30 10:49:53,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:53,337 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 10:49:53,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 10:49:53,337 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 10:49:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 10:49:53,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:53,338 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-30 10:49:53,338 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:53,338 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:53,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-30 10:49:53,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:53,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:53,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:53,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:53,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:53,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:53,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:49:53,749 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:54,214 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 10:49:54,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:54,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:54,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:54,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 10:49:54,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 10:49:54,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 10:49:54,558 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:54,558 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-30 10:49:55,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:55,213 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 10:49:55,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:49:55,213 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-30 10:49:55,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:55,214 INFO L225 Difference]: With dead ends: 151 [2018-09-30 10:49:55,214 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 10:49:55,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:55,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 10:49:55,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 10:49:55,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 10:49:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-30 10:49:55,218 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-30 10:49:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:55,218 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-30 10:49:55,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 10:49:55,218 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-30 10:49:55,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 10:49:55,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:55,219 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-30 10:49:55,219 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:55,219 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:55,220 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-30 10:49:55,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:55,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:55,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:55,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:55,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:55,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:55,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:49:55,629 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:55,709 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 10:49:55,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:55,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:56,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:56,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 10:49:56,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 10:49:56,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 10:49:56,032 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:56,032 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-30 10:49:56,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:56,544 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 10:49:56,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:49:56,545 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-30 10:49:56,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:56,551 INFO L225 Difference]: With dead ends: 153 [2018-09-30 10:49:56,551 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 10:49:56,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:56,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 10:49:56,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 10:49:56,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 10:49:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 10:49:56,554 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-30 10:49:56,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:56,554 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 10:49:56,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 10:49:56,555 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 10:49:56,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 10:49:56,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:56,556 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-30 10:49:56,556 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:56,556 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:56,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-30 10:49:56,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:56,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:56,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:56,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:56,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:57,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:57,036 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 [2018-09-30 10:49:57,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:57,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:57,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:57,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 10:49:57,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 10:49:57,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 10:49:57,536 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:57,536 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-30 10:49:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:58,313 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 10:49:58,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 10:49:58,313 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-30 10:49:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:58,314 INFO L225 Difference]: With dead ends: 155 [2018-09-30 10:49:58,314 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 10:49:58,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:58,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 10:49:58,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 10:49:58,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 10:49:58,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-30 10:49:58,317 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-30 10:49:58,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:58,317 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-30 10:49:58,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 10:49:58,318 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-30 10:49:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 10:49:58,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:58,318 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-30 10:49:58,318 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:58,318 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:58,319 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-30 10:49:58,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:58,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:58,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:58,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:58,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:58,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:58,839 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 [2018-09-30 10:49:58,846 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:58,885 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:58,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:58,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:59,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:59,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 10:49:59,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 10:49:59,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 10:49:59,197 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:59,197 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-30 10:49:59,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:59,744 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 10:49:59,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:49:59,744 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-30 10:49:59,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:59,745 INFO L225 Difference]: With dead ends: 157 [2018-09-30 10:49:59,745 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 10:49:59,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:59,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 10:49:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 10:49:59,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 10:49:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-30 10:49:59,748 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-30 10:49:59,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:59,748 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-30 10:49:59,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 10:49:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-30 10:49:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 10:49:59,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:59,749 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-30 10:49:59,749 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:59,749 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-30 10:49:59,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:59,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:59,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:59,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:59,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:00,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:00,158 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 [2018-09-30 10:50:00,165 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:00,250 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 10:50:00,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:00,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:00,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:00,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 10:50:00,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 10:50:00,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 10:50:00,529 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:00,529 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-30 10:50:01,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:01,070 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 10:50:01,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 10:50:01,070 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-30 10:50:01,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:01,071 INFO L225 Difference]: With dead ends: 159 [2018-09-30 10:50:01,071 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 10:50:01,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:01,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 10:50:01,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 10:50:01,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 10:50:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-30 10:50:01,073 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-30 10:50:01,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:01,074 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-30 10:50:01,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 10:50:01,074 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-30 10:50:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 10:50:01,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:01,074 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-30 10:50:01,075 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:01,075 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:01,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-30 10:50:01,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:01,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:01,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:01,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:01,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:01,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:01,507 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 [2018-09-30 10:50:01,514 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:01,554 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:01,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:01,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:01,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:01,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 10:50:01,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 10:50:01,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 10:50:01,843 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:01,843 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-30 10:50:02,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:02,825 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 10:50:02,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 10:50:02,826 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-30 10:50:02,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:02,826 INFO L225 Difference]: With dead ends: 161 [2018-09-30 10:50:02,827 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 10:50:02,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:02,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 10:50:02,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 10:50:02,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 10:50:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-30 10:50:02,830 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-30 10:50:02,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:02,830 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-30 10:50:02,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 10:50:02,830 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-30 10:50:02,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 10:50:02,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:02,831 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-30 10:50:02,831 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:02,831 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:02,831 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-30 10:50:02,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:02,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:02,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:02,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:02,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:03,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:03,275 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 [2018-09-30 10:50:03,283 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:03,366 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 10:50:03,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:03,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:03,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:03,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 10:50:03,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 10:50:03,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 10:50:03,647 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:03,647 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-30 10:50:04,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:04,511 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 10:50:04,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 10:50:04,511 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-30 10:50:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:04,512 INFO L225 Difference]: With dead ends: 163 [2018-09-30 10:50:04,512 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 10:50:04,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:04,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 10:50:04,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 10:50:04,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 10:50:04,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-30 10:50:04,516 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-30 10:50:04,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:04,516 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-30 10:50:04,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 10:50:04,517 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-30 10:50:04,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 10:50:04,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:04,518 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-30 10:50:04,518 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:04,518 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:04,518 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-30 10:50:04,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:04,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:04,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:04,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:04,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:05,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:05,050 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 [2018-09-30 10:50:05,057 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:50:05,138 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 10:50:05,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:05,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:05,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:05,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 10:50:05,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 10:50:05,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 10:50:05,447 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:05,447 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-30 10:50:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:06,024 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 10:50:06,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 10:50:06,024 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-30 10:50:06,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:06,025 INFO L225 Difference]: With dead ends: 165 [2018-09-30 10:50:06,025 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 10:50:06,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 10:50:06,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 10:50:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 10:50:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-30 10:50:06,028 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-30 10:50:06,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:06,029 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-30 10:50:06,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 10:50:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-30 10:50:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 10:50:06,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:06,030 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-30 10:50:06,030 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:06,030 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:06,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-30 10:50:06,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:06,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:06,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:06,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:06,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:06,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:06,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:50:06,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:06,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:06,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:06,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 10:50:06,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 10:50:06,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 10:50:06,921 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:06,921 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-30 10:50:07,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:07,844 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 10:50:07,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 10:50:07,844 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-30 10:50:07,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:07,845 INFO L225 Difference]: With dead ends: 167 [2018-09-30 10:50:07,845 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 10:50:07,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 10:50:07,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 10:50:07,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 10:50:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-30 10:50:07,848 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-30 10:50:07,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:07,848 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-30 10:50:07,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 10:50:07,848 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-30 10:50:07,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 10:50:07,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:07,849 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-30 10:50:07,850 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:07,850 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:07,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-30 10:50:07,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:07,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:07,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:07,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:07,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:08,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:08,333 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 [2018-09-30 10:50:08,341 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:08,380 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:08,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:08,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:08,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:08,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 10:50:08,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 10:50:08,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 10:50:08,682 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:08,682 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-30 10:50:09,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:09,523 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-30 10:50:09,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 10:50:09,523 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-30 10:50:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:09,524 INFO L225 Difference]: With dead ends: 169 [2018-09-30 10:50:09,524 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 10:50:09,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:09,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 10:50:09,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 10:50:09,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 10:50:09,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-30 10:50:09,527 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-30 10:50:09,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:09,527 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-30 10:50:09,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 10:50:09,527 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-30 10:50:09,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 10:50:09,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:09,528 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-30 10:50:09,528 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:09,528 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:09,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-30 10:50:09,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:09,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:09,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:09,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:09,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:10,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:10,117 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 [2018-09-30 10:50:10,124 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:10,213 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-30 10:50:10,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:10,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:10,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:10,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 10:50:10,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 10:50:10,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 10:50:10,513 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:10,514 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-30 10:50:11,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:11,330 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-30 10:50:11,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 10:50:11,330 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-30 10:50:11,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:11,331 INFO L225 Difference]: With dead ends: 171 [2018-09-30 10:50:11,331 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 10:50:11,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 10:50:11,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 10:50:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 10:50:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-30 10:50:11,334 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-30 10:50:11,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:11,334 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-30 10:50:11,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 10:50:11,334 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-30 10:50:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 10:50:11,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:11,335 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-30 10:50:11,335 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:11,335 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:11,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-30 10:50:11,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:11,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:11,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:11,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:11,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:11,796 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:11,796 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 [2018-09-30 10:50:11,805 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:11,850 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:11,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:11,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:12,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:12,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 10:50:12,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 10:50:12,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 10:50:12,233 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:12,234 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-30 10:50:13,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:13,053 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-30 10:50:13,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 10:50:13,053 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-30 10:50:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:13,054 INFO L225 Difference]: With dead ends: 173 [2018-09-30 10:50:13,054 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 10:50:13,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:13,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 10:50:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 10:50:13,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 10:50:13,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-30 10:50:13,057 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-30 10:50:13,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:13,057 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-30 10:50:13,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 10:50:13,057 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-30 10:50:13,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 10:50:13,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:13,058 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-30 10:50:13,058 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:13,058 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:13,058 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-30 10:50:13,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:13,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:13,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:13,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:13,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:13,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:13,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:50:13,553 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:13,654 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-30 10:50:13,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:13,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:14,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:14,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 10:50:14,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 10:50:14,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 10:50:14,013 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:14,013 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-30 10:50:14,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:14,698 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-30 10:50:14,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 10:50:14,698 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-30 10:50:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:14,699 INFO L225 Difference]: With dead ends: 175 [2018-09-30 10:50:14,699 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 10:50:14,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 10:50:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 10:50:14,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 10:50:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-30 10:50:14,702 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-30 10:50:14,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:14,703 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-30 10:50:14,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 10:50:14,703 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-30 10:50:14,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 10:50:14,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:14,704 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-30 10:50:14,704 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:14,704 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:14,704 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-30 10:50:14,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:14,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:14,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:14,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:14,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:15,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:15,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-30 10:50:15,208 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:15,302 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-30 10:50:15,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:15,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:15,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:15,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 10:50:15,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 10:50:15,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 10:50:15,610 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:15,610 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-30 10:50:16,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:16,958 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-30 10:50:16,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 10:50:16,958 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-30 10:50:16,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:16,959 INFO L225 Difference]: With dead ends: 177 [2018-09-30 10:50:16,959 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 10:50:16,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:16,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 10:50:16,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 10:50:16,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 10:50:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-30 10:50:16,964 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-30 10:50:16,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:16,965 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-30 10:50:16,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 10:50:16,965 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-30 10:50:16,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 10:50:16,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:16,966 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-30 10:50:16,966 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:16,966 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:16,966 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-30 10:50:16,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:16,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:16,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:16,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:16,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:17,519 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:17,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:50:17,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:17,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:18,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:18,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 10:50:18,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 10:50:18,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 10:50:18,047 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:18,047 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-30 10:50:18,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:18,747 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-30 10:50:18,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 10:50:18,748 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-30 10:50:18,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:18,749 INFO L225 Difference]: With dead ends: 179 [2018-09-30 10:50:18,749 INFO L226 Difference]: Without dead ends: 177 [2018-09-30 10:50:18,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:18,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-30 10:50:18,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-30 10:50:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 10:50:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-30 10:50:18,752 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-30 10:50:18,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:18,752 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-30 10:50:18,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 10:50:18,752 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-30 10:50:18,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 10:50:18,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:18,753 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-30 10:50:18,753 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:18,754 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:18,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-30 10:50:18,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:18,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:18,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:18,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:18,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:19,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:19,313 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 [2018-09-30 10:50:19,320 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:19,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:19,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:19,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:19,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:19,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 10:50:19,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 10:50:19,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 10:50:19,681 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:19,681 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-30 10:50:20,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:20,542 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-30 10:50:20,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 10:50:20,543 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-30 10:50:20,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:20,544 INFO L225 Difference]: With dead ends: 181 [2018-09-30 10:50:20,544 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 10:50:20,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 10:50:20,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 10:50:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 10:50:20,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-30 10:50:20,547 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-30 10:50:20,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:20,547 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-30 10:50:20,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 10:50:20,547 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-30 10:50:20,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 10:50:20,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:20,548 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-30 10:50:20,548 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:20,548 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:20,548 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-30 10:50:20,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:20,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:20,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:20,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:20,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:21,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:21,240 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 [2018-09-30 10:50:21,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:21,347 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-30 10:50:21,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:21,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:21,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:21,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 10:50:21,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 10:50:21,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 10:50:21,669 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:21,669 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-30 10:50:22,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:22,487 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-30 10:50:22,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 10:50:22,492 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-30 10:50:22,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:22,493 INFO L225 Difference]: With dead ends: 183 [2018-09-30 10:50:22,493 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 10:50:22,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 10:50:22,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 10:50:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 10:50:22,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-30 10:50:22,497 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-30 10:50:22,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:22,497 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-30 10:50:22,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 10:50:22,497 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-30 10:50:22,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-30 10:50:22,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:22,498 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-30 10:50:22,498 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:22,498 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:22,499 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-30 10:50:22,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:22,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:22,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:22,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:22,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:23,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:23,187 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 [2018-09-30 10:50:23,194 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:23,237 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:23,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:23,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:23,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:23,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 10:50:23,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 10:50:23,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 10:50:23,566 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:23,566 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-30 10:50:24,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:24,519 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-30 10:50:24,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 10:50:24,520 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-30 10:50:24,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:24,520 INFO L225 Difference]: With dead ends: 185 [2018-09-30 10:50:24,520 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 10:50:24,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:24,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 10:50:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-30 10:50:24,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 10:50:24,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-30 10:50:24,523 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-30 10:50:24,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:24,523 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-30 10:50:24,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 10:50:24,523 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-30 10:50:24,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 10:50:24,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:24,524 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-30 10:50:24,524 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:24,524 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:24,525 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-30 10:50:24,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:24,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:24,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:24,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:24,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:25,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:25,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:50:25,092 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:25,186 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-30 10:50:25,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:25,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:25,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:25,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 10:50:25,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 10:50:25,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 10:50:25,522 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:25,522 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-30 10:50:26,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:26,281 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-30 10:50:26,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 10:50:26,282 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-30 10:50:26,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:26,282 INFO L225 Difference]: With dead ends: 187 [2018-09-30 10:50:26,282 INFO L226 Difference]: Without dead ends: 185 [2018-09-30 10:50:26,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:26,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-30 10:50:26,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-30 10:50:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 10:50:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-30 10:50:26,285 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-30 10:50:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:26,286 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-30 10:50:26,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 10:50:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-30 10:50:26,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 10:50:26,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:26,287 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-30 10:50:26,287 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:26,287 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:26,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-30 10:50:26,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:26,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:26,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:26,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:26,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:26,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:26,851 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 [2018-09-30 10:50:26,859 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:50:26,959 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-30 10:50:26,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:26,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:27,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:27,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 10:50:27,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 10:50:27,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 10:50:27,288 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:27,288 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-30 10:50:28,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:28,058 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-30 10:50:28,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 10:50:28,058 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-30 10:50:28,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:28,059 INFO L225 Difference]: With dead ends: 189 [2018-09-30 10:50:28,059 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 10:50:28,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:28,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 10:50:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 10:50:28,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 10:50:28,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-30 10:50:28,063 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-30 10:50:28,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:28,063 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-30 10:50:28,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 10:50:28,064 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-30 10:50:28,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 10:50:28,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:28,065 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-30 10:50:28,065 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:28,065 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:28,065 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-30 10:50:28,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:28,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:28,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:28,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:28,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:28,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:28,798 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 [2018-09-30 10:50:28,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:28,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:29,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:29,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 10:50:29,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 10:50:29,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 10:50:29,201 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:29,201 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-30 10:50:30,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:30,013 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-30 10:50:30,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 10:50:30,014 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-30 10:50:30,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:30,015 INFO L225 Difference]: With dead ends: 191 [2018-09-30 10:50:30,015 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 10:50:30,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 10:50:30,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-30 10:50:30,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 10:50:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-30 10:50:30,019 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-30 10:50:30,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:30,019 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-30 10:50:30,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 10:50:30,019 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-30 10:50:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 10:50:30,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:30,020 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-30 10:50:30,020 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:30,021 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:30,021 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-30 10:50:30,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:30,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:30,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:30,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:30,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:30,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:30,637 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 [2018-09-30 10:50:30,654 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:30,702 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:30,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:30,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:31,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:31,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 10:50:31,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 10:50:31,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 10:50:31,101 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:31,101 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-30 10:50:31,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:31,932 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-30 10:50:31,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 10:50:31,932 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-30 10:50:31,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:31,933 INFO L225 Difference]: With dead ends: 193 [2018-09-30 10:50:31,933 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 10:50:31,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 10:50:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 10:50:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 10:50:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-30 10:50:31,936 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-30 10:50:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:31,937 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-30 10:50:31,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 10:50:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-30 10:50:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-30 10:50:31,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:31,938 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-30 10:50:31,938 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:31,938 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:31,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-30 10:50:31,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:31,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:31,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:31,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:31,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:32,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:32,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:50:32,540 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:32,650 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-30 10:50:32,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:32,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:32,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:32,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 10:50:32,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 10:50:32,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 10:50:32,988 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:32,988 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-30 10:50:34,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:34,070 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-30 10:50:34,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 10:50:34,070 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-30 10:50:34,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:34,071 INFO L225 Difference]: With dead ends: 195 [2018-09-30 10:50:34,071 INFO L226 Difference]: Without dead ends: 193 [2018-09-30 10:50:34,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:34,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-30 10:50:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-30 10:50:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 10:50:34,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-30 10:50:34,075 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-30 10:50:34,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:34,075 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-30 10:50:34,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 10:50:34,075 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-30 10:50:34,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 10:50:34,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:34,076 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-30 10:50:34,076 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:34,076 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:34,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-30 10:50:34,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:34,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:34,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:34,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:34,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:34,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:34,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:50:34,677 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:34,723 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:34,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:34,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:35,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:35,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 10:50:35,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 10:50:35,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 10:50:35,068 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:35,068 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-30 10:50:36,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:36,032 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-30 10:50:36,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 10:50:36,033 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-30 10:50:36,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:36,033 INFO L225 Difference]: With dead ends: 197 [2018-09-30 10:50:36,034 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 10:50:36,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:36,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 10:50:36,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 10:50:36,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 10:50:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-30 10:50:36,037 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-30 10:50:36,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:36,037 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-30 10:50:36,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 10:50:36,037 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-30 10:50:36,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 10:50:36,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:36,038 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-30 10:50:36,038 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:36,038 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:36,038 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-30 10:50:36,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:36,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:36,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:36,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:36,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:36,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:36,645 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 [2018-09-30 10:50:36,654 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:36,770 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-30 10:50:36,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:36,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:37,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:37,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 10:50:37,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 10:50:37,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 10:50:37,122 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:37,122 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-09-30 10:50:38,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:38,100 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-30 10:50:38,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 10:50:38,100 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-30 10:50:38,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:38,101 INFO L225 Difference]: With dead ends: 199 [2018-09-30 10:50:38,101 INFO L226 Difference]: Without dead ends: 197 [2018-09-30 10:50:38,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-30 10:50:38,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-30 10:50:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-30 10:50:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-09-30 10:50:38,105 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-09-30 10:50:38,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:38,105 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-09-30 10:50:38,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 10:50:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-09-30 10:50:38,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-30 10:50:38,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:38,106 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-09-30 10:50:38,107 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:38,107 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:38,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-09-30 10:50:38,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:38,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:38,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:38,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:38,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:38,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:38,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:50:38,857 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:50:38,961 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-30 10:50:38,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:38,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:39,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:39,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 10:50:39,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 10:50:39,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 10:50:39,315 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:39,315 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-09-30 10:50:40,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:40,184 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-30 10:50:40,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 10:50:40,184 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-09-30 10:50:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:40,185 INFO L225 Difference]: With dead ends: 201 [2018-09-30 10:50:40,185 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 10:50:40,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:40,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 10:50:40,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-30 10:50:40,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 10:50:40,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-30 10:50:40,190 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-09-30 10:50:40,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:40,190 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-30 10:50:40,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 10:50:40,190 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-30 10:50:40,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 10:50:40,191 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:40,191 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-09-30 10:50:40,191 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:40,191 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:40,192 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-09-30 10:50:40,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:40,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:40,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:40,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:40,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:40,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:40,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:40,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:40,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:41,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:41,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 10:50:41,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 10:50:41,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 10:50:41,247 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:41,247 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-09-30 10:50:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:42,247 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-30 10:50:42,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 10:50:42,247 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-30 10:50:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:42,248 INFO L225 Difference]: With dead ends: 203 [2018-09-30 10:50:42,248 INFO L226 Difference]: Without dead ends: 201 [2018-09-30 10:50:42,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-30 10:50:42,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-30 10:50:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 10:50:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-09-30 10:50:42,251 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-09-30 10:50:42,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:42,252 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-09-30 10:50:42,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 10:50:42,252 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-09-30 10:50:42,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 10:50:42,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:42,253 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-09-30 10:50:42,253 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:42,253 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:42,253 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-09-30 10:50:42,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:42,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:42,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:42,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:42,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:42,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:42,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:42,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:42,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:42,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:42,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:43,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:43,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 10:50:43,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 10:50:43,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 10:50:43,307 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:43,307 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-09-30 10:50:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:44,448 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-30 10:50:44,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 10:50:44,448 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-09-30 10:50:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:44,449 INFO L225 Difference]: With dead ends: 205 [2018-09-30 10:50:44,449 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 10:50:44,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:44,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 10:50:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 10:50:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 10:50:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-30 10:50:44,452 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-09-30 10:50:44,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:44,452 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-30 10:50:44,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 10:50:44,453 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-30 10:50:44,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 10:50:44,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:44,453 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-09-30 10:50:44,454 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:44,454 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:44,454 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-09-30 10:50:44,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:44,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:44,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:44,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:44,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:45,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:45,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:45,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:45,298 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-30 10:50:45,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:45,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:45,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:45,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 10:50:45,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 10:50:45,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 10:50:45,659 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:45,659 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-09-30 10:50:46,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:46,613 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-09-30 10:50:46,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 10:50:46,614 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-09-30 10:50:46,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:46,615 INFO L225 Difference]: With dead ends: 207 [2018-09-30 10:50:46,615 INFO L226 Difference]: Without dead ends: 205 [2018-09-30 10:50:46,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-30 10:50:46,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-30 10:50:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 10:50:46,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-09-30 10:50:46,618 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-09-30 10:50:46,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:46,618 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-09-30 10:50:46,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 10:50:46,618 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-09-30 10:50:46,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-30 10:50:46,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:46,619 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-09-30 10:50:46,619 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:46,619 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:46,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-09-30 10:50:46,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:46,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:46,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:46,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:46,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:47,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:47,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:47,289 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:47,341 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:47,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:47,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:47,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:47,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 10:50:47,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 10:50:47,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 10:50:47,734 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:47,734 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-09-30 10:50:48,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:48,846 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-30 10:50:48,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 10:50:48,846 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-09-30 10:50:48,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:48,847 INFO L225 Difference]: With dead ends: 209 [2018-09-30 10:50:48,847 INFO L226 Difference]: Without dead ends: 207 [2018-09-30 10:50:48,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:48,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-30 10:50:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-30 10:50:48,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-30 10:50:48,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-30 10:50:48,852 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-09-30 10:50:48,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:48,852 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-30 10:50:48,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 10:50:48,852 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-30 10:50:48,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 10:50:48,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:48,853 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-09-30 10:50:48,854 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:48,854 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-09-30 10:50:48,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:48,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:48,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:48,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:48,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:49,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:49,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:49,589 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:49,840 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-30 10:50:49,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:49,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:50,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:50,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 10:50:50,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 10:50:50,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 10:50:50,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:50,322 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-09-30 10:50:51,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:51,554 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-09-30 10:50:51,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 10:50:51,555 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-09-30 10:50:51,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:51,556 INFO L225 Difference]: With dead ends: 211 [2018-09-30 10:50:51,556 INFO L226 Difference]: Without dead ends: 209 [2018-09-30 10:50:51,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-30 10:50:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-30 10:50:51,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-30 10:50:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-09-30 10:50:51,559 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-09-30 10:50:51,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:51,559 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-09-30 10:50:51,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 10:50:51,559 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-09-30 10:50:51,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-30 10:50:51,560 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:51,560 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-09-30 10:50:51,560 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:51,560 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:51,560 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-09-30 10:50:51,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:51,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:51,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:51,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:51,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:52,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:52,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:52,298 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:50:52,416 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-30 10:50:52,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:52,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:52,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:52,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 10:50:52,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 10:50:52,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 10:50:52,795 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:52,795 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-09-30 10:50:54,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:54,013 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-30 10:50:54,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 10:50:54,014 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-09-30 10:50:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:54,014 INFO L225 Difference]: With dead ends: 213 [2018-09-30 10:50:54,014 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 10:50:54,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:54,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 10:50:54,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 10:50:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 10:50:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-30 10:50:54,018 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-09-30 10:50:54,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:54,018 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-30 10:50:54,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 10:50:54,019 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-30 10:50:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-30 10:50:54,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:54,020 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-09-30 10:50:54,020 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:54,020 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:54,020 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-09-30 10:50:54,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:54,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:54,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:54,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:54,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:54,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:54,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:54,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:54,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:55,182 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:55,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 10:50:55,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 10:50:55,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 10:50:55,183 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:55,184 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-09-30 10:50:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:56,204 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-09-30 10:50:56,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 10:50:56,204 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-09-30 10:50:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:56,205 INFO L225 Difference]: With dead ends: 215 [2018-09-30 10:50:56,205 INFO L226 Difference]: Without dead ends: 213 [2018-09-30 10:50:56,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:56,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-30 10:50:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-30 10:50:56,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-30 10:50:56,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-09-30 10:50:56,209 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-09-30 10:50:56,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:56,209 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-09-30 10:50:56,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 10:50:56,209 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-09-30 10:50:56,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 10:50:56,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:56,210 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-09-30 10:50:56,210 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:56,210 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:56,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-09-30 10:50:56,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:56,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:56,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:56,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:56,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:56,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:56,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:56,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:56,996 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:56,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:57,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:57,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:57,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 10:50:57,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 10:50:57,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 10:50:57,450 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:57,450 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-09-30 10:50:58,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:58,800 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-09-30 10:50:58,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 10:50:58,801 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-09-30 10:50:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:58,801 INFO L225 Difference]: With dead ends: 217 [2018-09-30 10:50:58,802 INFO L226 Difference]: Without dead ends: 215 [2018-09-30 10:50:58,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:58,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-30 10:50:58,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-30 10:50:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-30 10:50:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-09-30 10:50:58,805 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-09-30 10:50:58,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:58,806 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-09-30 10:50:58,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 10:50:58,806 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-09-30 10:50:58,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-30 10:50:58,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:58,807 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-09-30 10:50:58,807 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:58,807 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:58,807 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-09-30 10:50:58,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:58,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:58,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:58,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:58,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:59,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:59,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:59,598 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:59,758 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-30 10:50:59,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:59,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:00,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:00,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 10:51:00,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 10:51:00,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 10:51:00,145 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:00,145 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 108 states. [2018-09-30 10:51:01,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:01,551 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-09-30 10:51:01,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 10:51:01,551 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-09-30 10:51:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:01,552 INFO L225 Difference]: With dead ends: 219 [2018-09-30 10:51:01,552 INFO L226 Difference]: Without dead ends: 217 [2018-09-30 10:51:01,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:01,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-30 10:51:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-30 10:51:01,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-30 10:51:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-09-30 10:51:01,556 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2018-09-30 10:51:01,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:01,557 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-09-30 10:51:01,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 10:51:01,557 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-09-30 10:51:01,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-30 10:51:01,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:01,558 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1] [2018-09-30 10:51:01,558 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:01,558 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:01,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1219030453, now seen corresponding path program 106 times [2018-09-30 10:51:01,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:01,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:01,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:01,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:01,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:02,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:02,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:02,302 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:51:02,358 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:51:02,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:02,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:02,767 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:02,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 10:51:02,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 10:51:02,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 10:51:02,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:02,769 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 109 states. [2018-09-30 10:51:04,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:04,226 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-09-30 10:51:04,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 10:51:04,226 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 216 [2018-09-30 10:51:04,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:04,227 INFO L225 Difference]: With dead ends: 221 [2018-09-30 10:51:04,227 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 10:51:04,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 10:51:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-30 10:51:04,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-30 10:51:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-09-30 10:51:04,231 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2018-09-30 10:51:04,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:04,231 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-09-30 10:51:04,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 10:51:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-09-30 10:51:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 10:51:04,232 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:04,233 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-09-30 10:51:04,233 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:04,233 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:04,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 107 times [2018-09-30 10:51:04,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:04,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:04,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:04,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:04,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:05,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:05,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:05,015 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:51:05,137 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-09-30 10:51:05,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:05,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:05,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:05,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 10:51:05,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 10:51:05,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 10:51:05,527 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:05,527 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 110 states. [2018-09-30 10:51:06,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:06,634 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-09-30 10:51:06,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 10:51:06,635 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-09-30 10:51:06,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:06,635 INFO L225 Difference]: With dead ends: 223 [2018-09-30 10:51:06,635 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 10:51:06,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:06,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 10:51:06,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-30 10:51:06,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 10:51:06,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-09-30 10:51:06,639 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2018-09-30 10:51:06,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:06,639 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-09-30 10:51:06,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 10:51:06,640 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-09-30 10:51:06,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-30 10:51:06,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:06,641 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1] [2018-09-30 10:51:06,641 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:06,641 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash 949720383, now seen corresponding path program 108 times [2018-09-30 10:51:06,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:06,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:06,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:06,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:06,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:07,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:07,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:07,483 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:51:07,612 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2018-09-30 10:51:07,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:07,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:08,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:08,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 10:51:08,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 10:51:08,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 10:51:08,018 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:08,018 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 111 states. [2018-09-30 10:51:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:09,472 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-09-30 10:51:09,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 10:51:09,472 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 220 [2018-09-30 10:51:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:09,473 INFO L225 Difference]: With dead ends: 225 [2018-09-30 10:51:09,473 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 10:51:09,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:09,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 10:51:09,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-30 10:51:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-30 10:51:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-09-30 10:51:09,476 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2018-09-30 10:51:09,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:09,476 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-09-30 10:51:09,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 10:51:09,476 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-09-30 10:51:09,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-30 10:51:09,477 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:09,477 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1] [2018-09-30 10:51:09,477 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:09,477 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:09,478 INFO L82 PathProgramCache]: Analyzing trace with hash -2146693895, now seen corresponding path program 109 times [2018-09-30 10:51:09,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:09,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:09,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:09,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:09,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:10,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:10,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:10,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:10,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:10,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:10,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 10:51:10,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 10:51:10,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 10:51:10,741 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:10,742 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 112 states. [2018-09-30 10:51:12,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:12,119 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-09-30 10:51:12,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 10:51:12,119 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 222 [2018-09-30 10:51:12,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:12,120 INFO L225 Difference]: With dead ends: 227 [2018-09-30 10:51:12,120 INFO L226 Difference]: Without dead ends: 225 [2018-09-30 10:51:12,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:12,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-30 10:51:12,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-09-30 10:51:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-30 10:51:12,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2018-09-30 10:51:12,123 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2018-09-30 10:51:12,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:12,123 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2018-09-30 10:51:12,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 10:51:12,123 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2018-09-30 10:51:12,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-30 10:51:12,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:12,124 INFO L375 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1] [2018-09-30 10:51:12,124 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:12,124 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:12,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1388478925, now seen corresponding path program 110 times [2018-09-30 10:51:12,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:12,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:12,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:12,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:12,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:12,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:12,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:12,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:51:13,001 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:51:13,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:13,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:13,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:13,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 10:51:13,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 10:51:13,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 10:51:13,419 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:13,420 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 113 states. [2018-09-30 10:51:14,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:14,886 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-09-30 10:51:14,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 10:51:14,886 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 224 [2018-09-30 10:51:14,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:14,887 INFO L225 Difference]: With dead ends: 229 [2018-09-30 10:51:14,887 INFO L226 Difference]: Without dead ends: 227 [2018-09-30 10:51:14,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-30 10:51:14,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-30 10:51:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-30 10:51:14,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-09-30 10:51:14,890 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2018-09-30 10:51:14,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:14,891 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-09-30 10:51:14,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 10:51:14,891 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-09-30 10:51:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-30 10:51:14,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:14,891 INFO L375 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1] [2018-09-30 10:51:14,892 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:14,892 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:14,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1406634221, now seen corresponding path program 111 times [2018-09-30 10:51:14,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:14,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:14,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:14,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:14,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:15,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:15,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:15,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:51:15,896 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 112 check-sat command(s) [2018-09-30 10:51:15,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:15,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:16,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:16,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 10:51:16,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 10:51:16,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 10:51:16,292 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:16,292 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 114 states. [2018-09-30 10:51:17,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:17,709 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2018-09-30 10:51:17,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 10:51:17,709 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 226 [2018-09-30 10:51:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:17,710 INFO L225 Difference]: With dead ends: 231 [2018-09-30 10:51:17,710 INFO L226 Difference]: Without dead ends: 229 [2018-09-30 10:51:17,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:17,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-30 10:51:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-30 10:51:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-30 10:51:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2018-09-30 10:51:17,713 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 226 [2018-09-30 10:51:17,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:17,713 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2018-09-30 10:51:17,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 10:51:17,713 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2018-09-30 10:51:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-30 10:51:17,714 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:17,714 INFO L375 BasicCegarLoop]: trace histogram [113, 112, 1, 1, 1] [2018-09-30 10:51:17,714 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:17,714 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:17,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1139159769, now seen corresponding path program 112 times [2018-09-30 10:51:17,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:17,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:17,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:17,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:17,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:18,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:18,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:18,616 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:51:18,673 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:51:18,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:18,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:19,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:19,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-30 10:51:19,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 10:51:19,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 10:51:19,105 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:19,105 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 115 states. [2018-09-30 10:51:20,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:20,623 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-09-30 10:51:20,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 10:51:20,623 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 228 [2018-09-30 10:51:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:20,624 INFO L225 Difference]: With dead ends: 233 [2018-09-30 10:51:20,624 INFO L226 Difference]: Without dead ends: 231 [2018-09-30 10:51:20,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:20,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-30 10:51:20,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-30 10:51:20,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-30 10:51:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-09-30 10:51:20,628 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 228 [2018-09-30 10:51:20,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:20,629 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-09-30 10:51:20,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 10:51:20,629 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-09-30 10:51:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-30 10:51:20,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:20,630 INFO L375 BasicCegarLoop]: trace histogram [114, 113, 1, 1, 1] [2018-09-30 10:51:20,630 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:20,630 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:20,630 INFO L82 PathProgramCache]: Analyzing trace with hash 484174561, now seen corresponding path program 113 times [2018-09-30 10:51:20,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:20,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:20,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:20,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:20,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:21,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:21,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:21,515 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:51:21,698 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 114 check-sat command(s) [2018-09-30 10:51:21,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:21,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:22,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:22,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 10:51:22,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 10:51:22,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 10:51:22,248 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:22,248 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 116 states. [2018-09-30 10:51:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:23,706 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-09-30 10:51:23,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 10:51:23,707 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 230 [2018-09-30 10:51:23,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:23,707 INFO L225 Difference]: With dead ends: 235 [2018-09-30 10:51:23,707 INFO L226 Difference]: Without dead ends: 233 [2018-09-30 10:51:23,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:23,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-09-30 10:51:23,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-09-30 10:51:23,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-09-30 10:51:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-09-30 10:51:23,710 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 230 [2018-09-30 10:51:23,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:23,711 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-09-30 10:51:23,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 10:51:23,711 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-09-30 10:51:23,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-30 10:51:23,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:23,711 INFO L375 BasicCegarLoop]: trace histogram [115, 114, 1, 1, 1] [2018-09-30 10:51:23,712 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:23,712 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:23,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1435337243, now seen corresponding path program 114 times [2018-09-30 10:51:23,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:23,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:23,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:23,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:23,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:24,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:24,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:24,673 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:51:24,840 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 115 check-sat command(s) [2018-09-30 10:51:24,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:24,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:25,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:25,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:25,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-30 10:51:25,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-30 10:51:25,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-30 10:51:25,265 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:25,265 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 117 states. [2018-09-30 10:51:26,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:26,978 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-09-30 10:51:26,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 10:51:26,979 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 232 [2018-09-30 10:51:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:26,979 INFO L225 Difference]: With dead ends: 237 [2018-09-30 10:51:26,979 INFO L226 Difference]: Without dead ends: 235 [2018-09-30 10:51:26,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:26,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-30 10:51:26,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-30 10:51:26,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-30 10:51:26,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-09-30 10:51:26,982 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 232 [2018-09-30 10:51:26,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:26,982 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-09-30 10:51:26,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-30 10:51:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-09-30 10:51:26,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-30 10:51:26,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:26,983 INFO L375 BasicCegarLoop]: trace histogram [116, 115, 1, 1, 1] [2018-09-30 10:51:26,983 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:26,984 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:26,984 INFO L82 PathProgramCache]: Analyzing trace with hash 674640597, now seen corresponding path program 115 times [2018-09-30 10:51:26,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:26,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:26,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:26,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:26,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:27,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:27,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:27,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:28,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:28,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:28,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 10:51:28,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 10:51:28,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 10:51:28,457 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:28,457 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 118 states. [2018-09-30 10:51:30,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:30,018 INFO L93 Difference]: Finished difference Result 239 states and 239 transitions. [2018-09-30 10:51:30,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 10:51:30,018 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 234 [2018-09-30 10:51:30,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:30,019 INFO L225 Difference]: With dead ends: 239 [2018-09-30 10:51:30,019 INFO L226 Difference]: Without dead ends: 237 [2018-09-30 10:51:30,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:30,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-09-30 10:51:30,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-09-30 10:51:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-09-30 10:51:30,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2018-09-30 10:51:30,022 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 234 [2018-09-30 10:51:30,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:30,022 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2018-09-30 10:51:30,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 10:51:30,023 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2018-09-30 10:51:30,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-09-30 10:51:30,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:30,023 INFO L375 BasicCegarLoop]: trace histogram [117, 116, 1, 1, 1] [2018-09-30 10:51:30,023 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:30,024 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:30,024 INFO L82 PathProgramCache]: Analyzing trace with hash -210395889, now seen corresponding path program 116 times [2018-09-30 10:51:30,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:30,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:30,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:30,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:30,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:30,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:30,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:30,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:51:30,957 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:51:30,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:30,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:31,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:31,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-30 10:51:31,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 10:51:31,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 10:51:31,405 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:31,405 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 119 states. [2018-09-30 10:51:33,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:33,170 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-09-30 10:51:33,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 10:51:33,170 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 236 [2018-09-30 10:51:33,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:33,171 INFO L225 Difference]: With dead ends: 241 [2018-09-30 10:51:33,171 INFO L226 Difference]: Without dead ends: 239 [2018-09-30 10:51:33,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-30 10:51:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-09-30 10:51:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-30 10:51:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-09-30 10:51:33,174 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 236 [2018-09-30 10:51:33,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:33,174 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-09-30 10:51:33,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 10:51:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-09-30 10:51:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-30 10:51:33,174 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:33,175 INFO L375 BasicCegarLoop]: trace histogram [118, 117, 1, 1, 1] [2018-09-30 10:51:33,175 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:33,175 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:33,175 INFO L82 PathProgramCache]: Analyzing trace with hash -326934327, now seen corresponding path program 117 times [2018-09-30 10:51:33,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:33,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:33,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:33,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:33,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:34,059 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:34,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:34,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:34,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:51:34,226 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 118 check-sat command(s) [2018-09-30 10:51:34,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:34,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:34,767 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:34,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 10:51:34,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 10:51:34,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 10:51:34,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:34,769 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 120 states. [2018-09-30 10:51:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:36,329 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-09-30 10:51:36,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 10:51:36,330 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 238 [2018-09-30 10:51:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:36,330 INFO L225 Difference]: With dead ends: 243 [2018-09-30 10:51:36,330 INFO L226 Difference]: Without dead ends: 241 [2018-09-30 10:51:36,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:36,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-09-30 10:51:36,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-09-30 10:51:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-30 10:51:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2018-09-30 10:51:36,333 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 238 [2018-09-30 10:51:36,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:36,334 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2018-09-30 10:51:36,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 10:51:36,334 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2018-09-30 10:51:36,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-09-30 10:51:36,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:36,334 INFO L375 BasicCegarLoop]: trace histogram [119, 118, 1, 1, 1] [2018-09-30 10:51:36,335 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:36,335 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:36,335 INFO L82 PathProgramCache]: Analyzing trace with hash -651223549, now seen corresponding path program 118 times [2018-09-30 10:51:36,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:36,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:36,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:36,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:36,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:37,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:37,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:37,233 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:51:37,292 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:51:37,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:37,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:37,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:37,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-30 10:51:37,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-30 10:51:37,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-30 10:51:37,748 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:37,748 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 121 states. [2018-09-30 10:51:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:39,446 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-09-30 10:51:39,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 10:51:39,446 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 240 [2018-09-30 10:51:39,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:39,447 INFO L225 Difference]: With dead ends: 245 [2018-09-30 10:51:39,447 INFO L226 Difference]: Without dead ends: 243 [2018-09-30 10:51:39,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-30 10:51:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-09-30 10:51:39,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-30 10:51:39,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-09-30 10:51:39,450 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 240 [2018-09-30 10:51:39,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:39,450 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-09-30 10:51:39,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-30 10:51:39,450 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-09-30 10:51:39,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 10:51:39,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:39,451 INFO L375 BasicCegarLoop]: trace histogram [120, 119, 1, 1, 1] [2018-09-30 10:51:39,451 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:39,451 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:39,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1239446717, now seen corresponding path program 119 times [2018-09-30 10:51:39,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:39,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:39,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:39,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:39,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:40,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:40,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:40,557 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:51:40,701 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 120 check-sat command(s) [2018-09-30 10:51:40,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:40,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:41,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:41,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 10:51:41,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 10:51:41,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 10:51:41,131 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:41,131 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 122 states. [2018-09-30 10:51:42,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:42,609 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-09-30 10:51:42,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 10:51:42,609 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 242 [2018-09-30 10:51:42,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:42,610 INFO L225 Difference]: With dead ends: 247 [2018-09-30 10:51:42,610 INFO L226 Difference]: Without dead ends: 245 [2018-09-30 10:51:42,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:42,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-09-30 10:51:42,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-09-30 10:51:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-30 10:51:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-09-30 10:51:42,613 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 242 [2018-09-30 10:51:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:42,613 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-09-30 10:51:42,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 10:51:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-09-30 10:51:42,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-30 10:51:42,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:42,614 INFO L375 BasicCegarLoop]: trace histogram [121, 120, 1, 1, 1] [2018-09-30 10:51:42,614 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:42,615 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:42,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1402406135, now seen corresponding path program 120 times [2018-09-30 10:51:42,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:42,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:42,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:42,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:42,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:43,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:43,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:43,559 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:51:43,708 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 121 check-sat command(s) [2018-09-30 10:51:43,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:43,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:44,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:44,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-30 10:51:44,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-30 10:51:44,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-30 10:51:44,145 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:44,145 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 123 states. [2018-09-30 10:51:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:45,847 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-09-30 10:51:45,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 10:51:45,848 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 244 [2018-09-30 10:51:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:45,848 INFO L225 Difference]: With dead ends: 249 [2018-09-30 10:51:45,848 INFO L226 Difference]: Without dead ends: 247 [2018-09-30 10:51:45,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-30 10:51:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-09-30 10:51:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-30 10:51:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-09-30 10:51:45,852 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 244 [2018-09-30 10:51:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:45,852 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-09-30 10:51:45,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-30 10:51:45,852 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-09-30 10:51:45,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-30 10:51:45,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:45,853 INFO L375 BasicCegarLoop]: trace histogram [122, 121, 1, 1, 1] [2018-09-30 10:51:45,853 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:45,853 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:45,853 INFO L82 PathProgramCache]: Analyzing trace with hash -907383119, now seen corresponding path program 121 times [2018-09-30 10:51:45,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:45,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:45,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:45,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:45,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:46,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:46,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:46,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:46,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:47,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:47,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-30 10:51:47,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 10:51:47,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 10:51:47,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:47,323 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 124 states. [2018-09-30 10:51:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:48,831 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2018-09-30 10:51:48,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 10:51:48,832 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 246 [2018-09-30 10:51:48,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:48,832 INFO L225 Difference]: With dead ends: 251 [2018-09-30 10:51:48,832 INFO L226 Difference]: Without dead ends: 249 [2018-09-30 10:51:48,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:48,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-09-30 10:51:48,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2018-09-30 10:51:48,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-09-30 10:51:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2018-09-30 10:51:48,835 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 246 [2018-09-30 10:51:48,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:48,836 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2018-09-30 10:51:48,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 10:51:48,836 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2018-09-30 10:51:48,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-30 10:51:48,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:48,837 INFO L375 BasicCegarLoop]: trace histogram [123, 122, 1, 1, 1] [2018-09-30 10:51:48,837 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:48,837 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:48,837 INFO L82 PathProgramCache]: Analyzing trace with hash -116764181, now seen corresponding path program 122 times [2018-09-30 10:51:48,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:48,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:48,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:48,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:48,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:49,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:49,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:49,770 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:51:49,833 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:51:49,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:49,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:50,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:50,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-30 10:51:50,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 10:51:50,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 10:51:50,537 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:50,537 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand 125 states. [2018-09-30 10:51:52,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:52,403 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-09-30 10:51:52,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 10:51:52,403 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 248 [2018-09-30 10:51:52,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:52,403 INFO L225 Difference]: With dead ends: 253 [2018-09-30 10:51:52,404 INFO L226 Difference]: Without dead ends: 251 [2018-09-30 10:51:52,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:52,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-30 10:51:52,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-30 10:51:52,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-30 10:51:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-09-30 10:51:52,407 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 248 [2018-09-30 10:51:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:52,407 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-09-30 10:51:52,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 10:51:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-09-30 10:51:52,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-30 10:51:52,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:52,409 INFO L375 BasicCegarLoop]: trace histogram [124, 123, 1, 1, 1] [2018-09-30 10:51:52,409 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:52,409 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:52,409 INFO L82 PathProgramCache]: Analyzing trace with hash -541176155, now seen corresponding path program 123 times [2018-09-30 10:51:52,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:52,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:52,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:52,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:52,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:53,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:53,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:53,402 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:51:53,589 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 124 check-sat command(s) [2018-09-30 10:51:53,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:53,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:54,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:54,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-30 10:51:54,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 10:51:54,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 10:51:54,035 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:54,035 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 126 states. [2018-09-30 10:51:55,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:55,778 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2018-09-30 10:51:55,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 10:51:55,778 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 250 [2018-09-30 10:51:55,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:55,779 INFO L225 Difference]: With dead ends: 255 [2018-09-30 10:51:55,779 INFO L226 Difference]: Without dead ends: 253 [2018-09-30 10:51:55,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:55,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-09-30 10:51:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-09-30 10:51:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-09-30 10:51:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2018-09-30 10:51:55,782 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 250 [2018-09-30 10:51:55,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:55,782 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2018-09-30 10:51:55,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 10:51:55,782 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2018-09-30 10:51:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-09-30 10:51:55,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:55,783 INFO L375 BasicCegarLoop]: trace histogram [125, 124, 1, 1, 1] [2018-09-30 10:51:55,783 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:55,783 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:55,784 INFO L82 PathProgramCache]: Analyzing trace with hash -379190049, now seen corresponding path program 124 times [2018-09-30 10:51:55,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:55,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:55,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:55,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:55,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:56,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:56,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:51:56,747 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:51:56,806 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:51:56,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:56,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:57,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:57,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-30 10:51:57,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-30 10:51:57,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-30 10:51:57,260 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:57,260 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 127 states. [2018-09-30 10:51:59,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:59,178 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-09-30 10:51:59,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 10:51:59,179 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 252 [2018-09-30 10:51:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:59,179 INFO L225 Difference]: With dead ends: 257 [2018-09-30 10:51:59,180 INFO L226 Difference]: Without dead ends: 255 [2018-09-30 10:51:59,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:59,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-30 10:51:59,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-09-30 10:51:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-30 10:51:59,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-09-30 10:51:59,183 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 252 [2018-09-30 10:51:59,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:59,183 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-09-30 10:51:59,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-30 10:51:59,183 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-09-30 10:51:59,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-30 10:51:59,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:59,184 INFO L375 BasicCegarLoop]: trace histogram [126, 125, 1, 1, 1] [2018-09-30 10:51:59,184 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:59,184 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:59,184 INFO L82 PathProgramCache]: Analyzing trace with hash 670635161, now seen corresponding path program 125 times [2018-09-30 10:51:59,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:59,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:59,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:59,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:59,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:00,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:00,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:00,182 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:52:00,377 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 126 check-sat command(s) [2018-09-30 10:52:00,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:00,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:00,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:00,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-30 10:52:00,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 10:52:00,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 10:52:00,910 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:00,910 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 128 states. [2018-09-30 10:52:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:02,845 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-09-30 10:52:02,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 10:52:02,846 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 254 [2018-09-30 10:52:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:02,846 INFO L225 Difference]: With dead ends: 259 [2018-09-30 10:52:02,846 INFO L226 Difference]: Without dead ends: 257 [2018-09-30 10:52:02,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:02,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-09-30 10:52:02,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2018-09-30 10:52:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-09-30 10:52:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2018-09-30 10:52:02,850 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 254 [2018-09-30 10:52:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:02,850 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2018-09-30 10:52:02,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 10:52:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2018-09-30 10:52:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-09-30 10:52:02,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:02,851 INFO L375 BasicCegarLoop]: trace histogram [127, 126, 1, 1, 1] [2018-09-30 10:52:02,852 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:02,852 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:02,852 INFO L82 PathProgramCache]: Analyzing trace with hash 235347411, now seen corresponding path program 126 times [2018-09-30 10:52:02,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:02,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:02,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:02,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:02,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16002 backedges. 0 proven. 16002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:03,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:03,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:03,885 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:52:04,047 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 127 check-sat command(s) [2018-09-30 10:52:04,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:04,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16002 backedges. 0 proven. 16002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:04,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:04,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-30 10:52:04,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-30 10:52:04,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-30 10:52:04,501 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:04,501 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 129 states. [2018-09-30 10:52:06,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:06,259 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-09-30 10:52:06,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 10:52:06,259 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 256 [2018-09-30 10:52:06,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:06,260 INFO L225 Difference]: With dead ends: 261 [2018-09-30 10:52:06,260 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 10:52:06,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:06,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 10:52:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-09-30 10:52:06,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 10:52:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2018-09-30 10:52:06,264 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 256 [2018-09-30 10:52:06,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:06,264 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2018-09-30 10:52:06,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-30 10:52:06,264 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2018-09-30 10:52:06,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-30 10:52:06,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:06,265 INFO L375 BasicCegarLoop]: trace histogram [128, 127, 1, 1, 1] [2018-09-30 10:52:06,266 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:06,266 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:06,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1464352627, now seen corresponding path program 127 times [2018-09-30 10:52:06,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:06,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:06,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:06,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:06,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16256 backedges. 0 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:07,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:07,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:07,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:52:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:07,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16256 backedges. 0 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:07,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:07,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-30 10:52:07,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 10:52:07,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 10:52:07,821 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:07,821 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 130 states. [2018-09-30 10:52:09,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:09,736 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2018-09-30 10:52:09,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 10:52:09,737 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 258 [2018-09-30 10:52:09,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:09,738 INFO L225 Difference]: With dead ends: 263 [2018-09-30 10:52:09,738 INFO L226 Difference]: Without dead ends: 261 [2018-09-30 10:52:09,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:09,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-09-30 10:52:09,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-09-30 10:52:09,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-09-30 10:52:09,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2018-09-30 10:52:09,742 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 258 [2018-09-30 10:52:09,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:09,742 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2018-09-30 10:52:09,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 10:52:09,742 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2018-09-30 10:52:09,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-09-30 10:52:09,743 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:09,743 INFO L375 BasicCegarLoop]: trace histogram [129, 128, 1, 1, 1] [2018-09-30 10:52:09,743 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:09,743 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:09,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1506450631, now seen corresponding path program 128 times [2018-09-30 10:52:09,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:09,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:09,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:09,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:52:09,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16512 backedges. 0 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:10,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:10,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:10,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:52:10,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:52:10,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:10,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16512 backedges. 0 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:11,418 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:11,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-30 10:52:11,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 10:52:11,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 10:52:11,421 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:11,421 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand 131 states. [2018-09-30 10:52:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:13,669 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-09-30 10:52:13,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 10:52:13,669 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 260 [2018-09-30 10:52:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:13,670 INFO L225 Difference]: With dead ends: 265 [2018-09-30 10:52:13,670 INFO L226 Difference]: Without dead ends: 263 [2018-09-30 10:52:13,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:13,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-30 10:52:13,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-09-30 10:52:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-09-30 10:52:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-09-30 10:52:13,674 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 260 [2018-09-30 10:52:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:13,674 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-09-30 10:52:13,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 10:52:13,674 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-09-30 10:52:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-30 10:52:13,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:13,675 INFO L375 BasicCegarLoop]: trace histogram [130, 129, 1, 1, 1] [2018-09-30 10:52:13,675 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:13,676 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:13,676 INFO L82 PathProgramCache]: Analyzing trace with hash 295129729, now seen corresponding path program 129 times [2018-09-30 10:52:13,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:13,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:13,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:13,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:13,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16770 backedges. 0 proven. 16770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:14,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:14,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:14,705 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:52:14,887 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 130 check-sat command(s) [2018-09-30 10:52:14,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:14,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16770 backedges. 0 proven. 16770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:15,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:15,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-30 10:52:15,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 10:52:15,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 10:52:15,390 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:15,390 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 132 states. [2018-09-30 10:52:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:17,519 INFO L93 Difference]: Finished difference Result 267 states and 267 transitions. [2018-09-30 10:52:17,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-30 10:52:17,520 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 262 [2018-09-30 10:52:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:17,520 INFO L225 Difference]: With dead ends: 267 [2018-09-30 10:52:17,520 INFO L226 Difference]: Without dead ends: 265 [2018-09-30 10:52:17,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-09-30 10:52:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2018-09-30 10:52:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-09-30 10:52:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2018-09-30 10:52:17,523 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 262 [2018-09-30 10:52:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:17,524 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2018-09-30 10:52:17,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 10:52:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2018-09-30 10:52:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-09-30 10:52:17,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:17,524 INFO L375 BasicCegarLoop]: trace histogram [131, 130, 1, 1, 1] [2018-09-30 10:52:17,525 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:17,525 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:17,525 INFO L82 PathProgramCache]: Analyzing trace with hash 151880123, now seen corresponding path program 130 times [2018-09-30 10:52:17,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:17,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:17,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:17,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:17,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 17030 backedges. 0 proven. 17030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:18,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:18,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:18,569 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:52:18,633 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:52:18,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:18,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17030 backedges. 0 proven. 17030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:19,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:19,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-30 10:52:19,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-30 10:52:19,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-30 10:52:19,117 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:19,117 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand 133 states. [2018-09-30 10:52:21,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:21,220 INFO L93 Difference]: Finished difference Result 269 states and 269 transitions. [2018-09-30 10:52:21,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-30 10:52:21,221 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 264 [2018-09-30 10:52:21,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:21,221 INFO L225 Difference]: With dead ends: 269 [2018-09-30 10:52:21,222 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 10:52:21,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:21,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 10:52:21,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-09-30 10:52:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-09-30 10:52:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2018-09-30 10:52:21,225 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 264 [2018-09-30 10:52:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:21,225 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2018-09-30 10:52:21,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-30 10:52:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2018-09-30 10:52:21,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-09-30 10:52:21,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:21,226 INFO L375 BasicCegarLoop]: trace histogram [132, 131, 1, 1, 1] [2018-09-30 10:52:21,226 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:21,226 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:21,226 INFO L82 PathProgramCache]: Analyzing trace with hash -72037771, now seen corresponding path program 131 times [2018-09-30 10:52:21,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:21,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:21,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:21,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:21,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17292 backedges. 0 proven. 17292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:22,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:22,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:22,302 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:52:22,468 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 132 check-sat command(s) [2018-09-30 10:52:22,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:22,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17292 backedges. 0 proven. 17292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:22,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:22,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-30 10:52:22,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 10:52:22,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 10:52:22,950 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:22,950 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 134 states. [2018-09-30 10:52:24,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:24,683 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2018-09-30 10:52:24,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 10:52:24,684 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 266 [2018-09-30 10:52:24,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:24,684 INFO L225 Difference]: With dead ends: 271 [2018-09-30 10:52:24,684 INFO L226 Difference]: Without dead ends: 269 [2018-09-30 10:52:24,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:24,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-30 10:52:24,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2018-09-30 10:52:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-09-30 10:52:24,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2018-09-30 10:52:24,688 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 266 [2018-09-30 10:52:24,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:24,688 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2018-09-30 10:52:24,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 10:52:24,688 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2018-09-30 10:52:24,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-09-30 10:52:24,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:24,689 INFO L375 BasicCegarLoop]: trace histogram [133, 132, 1, 1, 1] [2018-09-30 10:52:24,689 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:24,689 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:24,689 INFO L82 PathProgramCache]: Analyzing trace with hash -508769105, now seen corresponding path program 132 times [2018-09-30 10:52:24,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:24,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:24,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:24,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:24,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 17556 backedges. 0 proven. 17556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:25,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:25,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:25,815 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:52:26,055 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 133 check-sat command(s) [2018-09-30 10:52:26,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:26,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 17556 backedges. 0 proven. 17556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:26,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:26,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-30 10:52:26,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-30 10:52:26,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-30 10:52:26,628 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:26,628 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand 135 states. [2018-09-30 10:52:28,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:28,907 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-09-30 10:52:28,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 10:52:28,907 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 268 [2018-09-30 10:52:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:28,908 INFO L225 Difference]: With dead ends: 273 [2018-09-30 10:52:28,908 INFO L226 Difference]: Without dead ends: 271 [2018-09-30 10:52:28,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:28,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-09-30 10:52:28,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-09-30 10:52:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-09-30 10:52:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2018-09-30 10:52:28,911 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 268 [2018-09-30 10:52:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:28,911 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2018-09-30 10:52:28,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-30 10:52:28,911 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2018-09-30 10:52:28,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-09-30 10:52:28,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:28,912 INFO L375 BasicCegarLoop]: trace histogram [134, 133, 1, 1, 1] [2018-09-30 10:52:28,912 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:28,912 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:28,913 INFO L82 PathProgramCache]: Analyzing trace with hash 699213929, now seen corresponding path program 133 times [2018-09-30 10:52:28,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:28,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:28,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:28,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:28,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 17822 backedges. 0 proven. 17822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:30,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:30,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:30,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:52:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:30,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17822 backedges. 0 proven. 17822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:30,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:30,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-30 10:52:30,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 10:52:30,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 10:52:30,615 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:30,615 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 136 states. [2018-09-30 10:52:32,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:32,573 INFO L93 Difference]: Finished difference Result 275 states and 275 transitions. [2018-09-30 10:52:32,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-30 10:52:32,573 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 270 [2018-09-30 10:52:32,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:32,574 INFO L225 Difference]: With dead ends: 275 [2018-09-30 10:52:32,574 INFO L226 Difference]: Without dead ends: 273 [2018-09-30 10:52:32,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:32,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-09-30 10:52:32,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2018-09-30 10:52:32,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-09-30 10:52:32,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2018-09-30 10:52:32,577 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 270 [2018-09-30 10:52:32,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:32,578 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2018-09-30 10:52:32,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 10:52:32,578 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2018-09-30 10:52:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-09-30 10:52:32,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:32,579 INFO L375 BasicCegarLoop]: trace histogram [135, 134, 1, 1, 1] [2018-09-30 10:52:32,579 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:32,579 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:32,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1929739683, now seen corresponding path program 134 times [2018-09-30 10:52:32,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:32,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:32,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:32,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:52:32,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18090 backedges. 0 proven. 18090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:33,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:33,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:33,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:52:33,776 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:52:33,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:33,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18090 backedges. 0 proven. 18090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:34,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:34,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-30 10:52:34,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 10:52:34,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 10:52:34,289 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:34,289 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand 137 states. [2018-09-30 10:52:36,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:36,629 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-09-30 10:52:36,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 10:52:36,629 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 272 [2018-09-30 10:52:36,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:36,630 INFO L225 Difference]: With dead ends: 277 [2018-09-30 10:52:36,630 INFO L226 Difference]: Without dead ends: 275 [2018-09-30 10:52:36,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:36,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-09-30 10:52:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-09-30 10:52:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-09-30 10:52:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-09-30 10:52:36,635 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 272 [2018-09-30 10:52:36,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:36,635 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-09-30 10:52:36,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 10:52:36,635 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-09-30 10:52:36,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-09-30 10:52:36,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:36,637 INFO L375 BasicCegarLoop]: trace histogram [136, 135, 1, 1, 1] [2018-09-30 10:52:36,637 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:36,637 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:36,637 INFO L82 PathProgramCache]: Analyzing trace with hash -945984419, now seen corresponding path program 135 times [2018-09-30 10:52:36,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:36,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:36,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:36,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:36,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18360 backedges. 0 proven. 18360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:37,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:37,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:37,873 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:52:38,083 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 136 check-sat command(s) [2018-09-30 10:52:38,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:38,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18360 backedges. 0 proven. 18360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:38,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:38,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-30 10:52:38,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 10:52:38,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 10:52:38,588 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:38,588 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 138 states. [2018-09-30 10:52:40,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:52:40,478 INFO L93 Difference]: Finished difference Result 279 states and 279 transitions. [2018-09-30 10:52:40,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-30 10:52:40,478 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 274 [2018-09-30 10:52:40,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:52:40,479 INFO L225 Difference]: With dead ends: 279 [2018-09-30 10:52:40,479 INFO L226 Difference]: Without dead ends: 277 [2018-09-30 10:52:40,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:52:40,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-09-30 10:52:40,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2018-09-30 10:52:40,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-09-30 10:52:40,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2018-09-30 10:52:40,483 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 274 [2018-09-30 10:52:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:52:40,483 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2018-09-30 10:52:40,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 10:52:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2018-09-30 10:52:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-09-30 10:52:40,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:52:40,484 INFO L375 BasicCegarLoop]: trace histogram [137, 136, 1, 1, 1] [2018-09-30 10:52:40,484 INFO L423 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:52:40,484 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:52:40,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1442092183, now seen corresponding path program 136 times [2018-09-30 10:52:40,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:52:40,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:52:40,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:40,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:52:40,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:52:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:52:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18632 backedges. 0 proven. 18632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:41,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:52:41,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:52:41,802 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:52:41,872 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:52:41,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:52:41,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:52:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18632 backedges. 0 proven. 18632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:52:42,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:52:42,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-09-30 10:52:42,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-30 10:52:42,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-30 10:52:42,395 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:52:42,395 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 139 states. Received shutdown request... [2018-09-30 10:52:42,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:52:42,441 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:52:42,447 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:52:42,447 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:52:42 BoogieIcfgContainer [2018-09-30 10:52:42,447 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:52:42,448 INFO L168 Benchmark]: Toolchain (without parser) took 243815.96 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 140.5 MB). Free memory was 1.5 GB in the beginning and 946.8 MB in the end (delta: 527.3 MB). Peak memory consumption was 667.8 MB. Max. memory is 7.1 GB. [2018-09-30 10:52:42,450 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:52:42,450 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.93 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:52:42,451 INFO L168 Benchmark]: Boogie Preprocessor took 20.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:52:42,451 INFO L168 Benchmark]: RCFGBuilder took 336.78 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:52:42,452 INFO L168 Benchmark]: TraceAbstraction took 243411.89 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 140.5 MB). Free memory was 1.5 GB in the beginning and 946.8 MB in the end (delta: 506.1 MB). Peak memory consumption was 646.7 MB. Max. memory is 7.1 GB. [2018-09-30 10:52:42,454 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 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.93 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 336.78 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243411.89 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 140.5 MB). Free memory was 1.5 GB in the beginning and 946.8 MB in the end (delta: 506.1 MB). Peak memory consumption was 646.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 31). Cancelled while BasicCegarLoop was constructing difference of abstraction (277states) and FLOYD_HOARE automaton (currently 5 states, 139 states before enhancement), while ReachableStatesComputation was computing reachable states (5 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 243.3s OverallTime, 137 OverallIterations, 137 TraceHistogramMax, 107.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 546 SDtfs, 0 SDslu, 13912 SDs, 0 SdLazy, 14050 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28630 GetRequests, 19177 SyntacticMatches, 0 SemanticMatches, 9453 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=277occurred in iteration=136, 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: 0.4s AutomataMinimizationTime, 136 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 11.1s SatisfiabilityAnalysisTime, 116.5s InterpolantComputationTime, 38356 NumberOfCodeBlocks, 38356 NumberOfCodeBlocksAsserted, 4920 NumberOfCheckSat, 38083 ConstructedInterpolants, 0 QuantifiedInterpolants, 20948101 SizeOfPredicates, 136 NumberOfNonLiveVariables, 39032 ConjunctsInSsa, 9588 ConjunctsInUnsatCore, 273 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1714144 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/count_by_2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-52-42-464.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-52-42-464.csv Completed graceful shutdown