java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:46:35,352 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:46:35,354 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:46:35,372 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:46:35,372 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:46:35,374 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:46:35,375 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:46:35,378 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:46:35,380 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:46:35,382 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:46:35,383 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 19:46:35,421 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:46:35,437 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:46:35,437 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:46:35,438 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:46:35,438 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:46:35,439 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:46:35,439 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:46:35,439 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:46:35,439 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:46:35,440 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:46:35,440 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:46:35,440 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:46:35,440 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:46:35,440 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:46:35,441 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:46:35,441 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:46:35,441 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:46:35,441 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:46:35,441 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:46:35,442 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:46:35,442 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:46:35,442 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:46:35,442 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:46:35,442 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:46:35,443 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:46:35,443 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:46:35,443 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:46:35,443 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:46:35,444 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:46:35,444 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:46:35,444 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:46:35,508 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:46:35,522 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:46:35,530 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:46:35,532 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:46:35,534 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:46:35,534 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-09-23 19:46:35,535 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl' [2018-09-23 19:46:35,579 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:46:35,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:46:35,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:46:35,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:46:35,585 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:46:35,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:46:35" (1/1) ... [2018-09-23 19:46:35,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:46:35" (1/1) ... [2018-09-23 19:46:35,624 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 19:46:35,624 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 19:46:35,625 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 19:46:35,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:46:35,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:46:35,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:46:35,628 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:46:35,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:46:35" (1/1) ... [2018-09-23 19:46:35,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:46:35" (1/1) ... [2018-09-23 19:46:35,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:46:35" (1/1) ... [2018-09-23 19:46:35,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:46:35" (1/1) ... [2018-09-23 19:46:35,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:46:35" (1/1) ... [2018-09-23 19:46:35,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:46:35" (1/1) ... [2018-09-23 19:46:35,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:46:35" (1/1) ... [2018-09-23 19:46:35,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:46:35,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:46:35,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:46:35,651 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:46:35,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:46:35" (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 [2018-09-23 19:46:35,734 INFO L130 BoogieDeclarations]: Found specification of procedure proc [2018-09-23 19:46:35,735 INFO L138 BoogieDeclarations]: Found implementation of procedure proc [2018-09-23 19:46:35,931 INFO L351 CfgBuilder]: Using library mode [2018-09-23 19:46:35,932 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:46:35 BoogieIcfgContainer [2018-09-23 19:46:35,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:46:35,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:46:35,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:46:35,937 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:46:35,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:46:35" (1/2) ... [2018-09-23 19:46:35,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d8151a and model type DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:46:35, skipping insertion in model container [2018-09-23 19:46:35,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:46:35" (2/2) ... [2018-09-23 19:46:35,940 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-09-23 19:46:35,950 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:46:35,960 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:46:36,006 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:46:36,006 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:46:36,007 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:46:36,007 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:46:36,007 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:46:36,007 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:46:36,007 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:46:36,007 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:46:36,007 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:46:36,021 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-23 19:46:36,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-23 19:46:36,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:36,028 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-23 19:46:36,029 INFO L423 AbstractCegarLoop]: === Iteration 1 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:36,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:36,036 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-23 19:46:36,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:36,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:36,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:36,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:36,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:36,202 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:46:36,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-23 19:46:36,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:46:36,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:46:36,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:46:36,222 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-23 19:46:36,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:36,305 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 19:46:36,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:46:36,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-23 19:46:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:36,318 INFO L225 Difference]: With dead ends: 9 [2018-09-23 19:46:36,319 INFO L226 Difference]: Without dead ends: 4 [2018-09-23 19:46:36,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:46:36,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-23 19:46:36,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-23 19:46:36,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-23 19:46:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-23 19:46:36,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-23 19:46:36,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:36,399 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-23 19:46:36,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:46:36,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-23 19:46:36,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 19:46:36,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:36,400 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 19:46:36,401 INFO L423 AbstractCegarLoop]: === Iteration 2 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:36,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:36,401 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-23 19:46:36,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:36,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:36,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:36,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:36,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:36,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:36,546 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 [2018-09-23 19:46:36,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:36,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:36,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:36,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-23 19:46:36,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:46:36,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:46:36,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:46:36,675 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-09-23 19:46:36,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:36,780 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-23 19:46:36,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:46:36,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-09-23 19:46:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:36,782 INFO L225 Difference]: With dead ends: 6 [2018-09-23 19:46:36,782 INFO L226 Difference]: Without dead ends: 5 [2018-09-23 19:46:36,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:46:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-23 19:46:36,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-23 19:46:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-23 19:46:36,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-23 19:46:36,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-23 19:46:36,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:36,786 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-23 19:46:36,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:46:36,787 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-23 19:46:36,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 19:46:36,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:36,787 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-23 19:46:36,788 INFO L423 AbstractCegarLoop]: === Iteration 3 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:36,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:36,788 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-23 19:46:36,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:36,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:36,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:36,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:36,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:37,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:37,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:46:37,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:46:37,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:46:37,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:37,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:37,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:37,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 19:46:37,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:46:37,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:46:37,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:46:37,197 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-23 19:46:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:37,248 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-23 19:46:37,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:46:37,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-23 19:46:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:37,249 INFO L225 Difference]: With dead ends: 7 [2018-09-23 19:46:37,250 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 19:46:37,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:46:37,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 19:46:37,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 19:46:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 19:46:37,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 19:46:37,253 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-23 19:46:37,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:37,254 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 19:46:37,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:46:37,254 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 19:46:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:46:37,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:37,255 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-23 19:46:37,255 INFO L423 AbstractCegarLoop]: === Iteration 4 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:37,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:37,256 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-23 19:46:37,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:37,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:37,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:37,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:37,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:37,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:37,419 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 [2018-09-23 19:46:37,430 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:46:37,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 19:46:37,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:37,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:37,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:37,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:46:37,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:46:37,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:46:37,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:46:37,566 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-23 19:46:37,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:37,682 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-23 19:46:37,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:46:37,682 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-23 19:46:37,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:37,683 INFO L225 Difference]: With dead ends: 8 [2018-09-23 19:46:37,683 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 19:46:37,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:46:37,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 19:46:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 19:46:37,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 19:46:37,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 19:46:37,688 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-23 19:46:37,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:37,689 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 19:46:37,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:46:37,689 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 19:46:37,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:46:37,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:37,690 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-23 19:46:37,690 INFO L423 AbstractCegarLoop]: === Iteration 5 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:37,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:37,690 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-23 19:46:37,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:37,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:37,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:37,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:37,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:37,823 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:37,823 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 [2018-09-23 19:46:37,833 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:46:37,848 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:46:37,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:37,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:37,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:37,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:46:37,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:46:37,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:46:37,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:46:37,880 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-23 19:46:38,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:38,033 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 19:46:38,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:46:38,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-23 19:46:38,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:38,034 INFO L225 Difference]: With dead ends: 9 [2018-09-23 19:46:38,035 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 19:46:38,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:46:38,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 19:46:38,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 19:46:38,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 19:46:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 19:46:38,039 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-23 19:46:38,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:38,040 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 19:46:38,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:46:38,040 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 19:46:38,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:46:38,041 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:38,041 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-23 19:46:38,041 INFO L423 AbstractCegarLoop]: === Iteration 6 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:38,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:38,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-23 19:46:38,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:38,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:38,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:38,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:38,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:38,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:38,177 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 [2018-09-23 19:46:38,187 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:46:38,197 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 19:46:38,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:38,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:38,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:38,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:46:38,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:46:38,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:46:38,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:46:38,230 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-23 19:46:38,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:38,346 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-23 19:46:38,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:46:38,347 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-23 19:46:38,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:38,347 INFO L225 Difference]: With dead ends: 10 [2018-09-23 19:46:38,348 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 19:46:38,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:46:38,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 19:46:38,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 19:46:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:46:38,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 19:46:38,353 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-23 19:46:38,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:38,353 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 19:46:38,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:46:38,353 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 19:46:38,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:46:38,354 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:38,354 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-23 19:46:38,354 INFO L423 AbstractCegarLoop]: === Iteration 7 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:38,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:38,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-23 19:46:38,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:38,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:38,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:38,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:38,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:38,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:38,856 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 [2018-09-23 19:46:38,864 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:46:38,872 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 19:46:38,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:38,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:38,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:38,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:46:38,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:46:38,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:46:38,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:46:38,904 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-23 19:46:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:39,044 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 19:46:39,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:46:39,044 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-23 19:46:39,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:39,045 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:46:39,045 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 19:46:39,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:46:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 19:46:39,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 19:46:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 19:46:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 19:46:39,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-23 19:46:39,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:39,052 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 19:46:39,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:46:39,052 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 19:46:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:46:39,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:39,053 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-23 19:46:39,053 INFO L423 AbstractCegarLoop]: === Iteration 8 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:39,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:39,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-23 19:46:39,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:39,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:39,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:39,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:39,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:39,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:39,254 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 [2018-09-23 19:46:39,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:39,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:39,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:39,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:46:39,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:46:39,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:46:39,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:46:39,300 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-23 19:46:39,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:39,407 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-23 19:46:39,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:46:39,408 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-23 19:46:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:39,409 INFO L225 Difference]: With dead ends: 12 [2018-09-23 19:46:39,409 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 19:46:39,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:46:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 19:46:39,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 19:46:39,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:46:39,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 19:46:39,414 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-23 19:46:39,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:39,415 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 19:46:39,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:46:39,415 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 19:46:39,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:46:39,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:39,416 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-23 19:46:39,416 INFO L423 AbstractCegarLoop]: === Iteration 9 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:39,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:39,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-23 19:46:39,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:39,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:39,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:39,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:39,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:39,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:39,638 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 [2018-09-23 19:46:39,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:46:39,662 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:46:39,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:39,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:39,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:39,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:46:39,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:46:39,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:46:39,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:46:39,701 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-23 19:46:39,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:39,814 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 19:46:39,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:46:39,816 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-23 19:46:39,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:39,816 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:46:39,817 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 19:46:39,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:46:39,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 19:46:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 19:46:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 19:46:39,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 19:46:39,821 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-23 19:46:39,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:39,821 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 19:46:39,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:46:39,822 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 19:46:39,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:46:39,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:39,822 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-23 19:46:39,823 INFO L423 AbstractCegarLoop]: === Iteration 10 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:39,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:39,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-23 19:46:39,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:39,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:39,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:39,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:39,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:40,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:40,087 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 [2018-09-23 19:46:40,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:46:40,120 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:46:40,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:40,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:40,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:40,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:46:40,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:46:40,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:46:40,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:46:40,162 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-23 19:46:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:40,291 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-23 19:46:40,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:46:40,291 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-23 19:46:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:40,292 INFO L225 Difference]: With dead ends: 14 [2018-09-23 19:46:40,292 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 19:46:40,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:46:40,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 19:46:40,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 19:46:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 19:46:40,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 19:46:40,296 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-23 19:46:40,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:40,296 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 19:46:40,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:46:40,296 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 19:46:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:46:40,297 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:40,297 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-23 19:46:40,298 INFO L423 AbstractCegarLoop]: === Iteration 11 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:40,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:40,298 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-23 19:46:40,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:40,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:40,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:40,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:40,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:40,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:40,496 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 [2018-09-23 19:46:40,518 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:46:40,531 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:46:40,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:40,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:40,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:40,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 19:46:40,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:46:40,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:46:40,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:46:40,572 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-23 19:46:40,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:40,698 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 19:46:40,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:46:40,699 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-23 19:46:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:40,700 INFO L225 Difference]: With dead ends: 15 [2018-09-23 19:46:40,700 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 19:46:40,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:46:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 19:46:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 19:46:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:46:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-23 19:46:40,705 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-23 19:46:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:40,706 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-23 19:46:40,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:46:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-23 19:46:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:46:40,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:40,707 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-23 19:46:40,707 INFO L423 AbstractCegarLoop]: === Iteration 12 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:40,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:40,707 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-23 19:46:40,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:40,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:40,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:40,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:40,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:40,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:40,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:40,934 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 [2018-09-23 19:46:40,948 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:46:40,960 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:46:40,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:40,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:40,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:40,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 19:46:40,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:46:40,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:46:40,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:46:40,991 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-23 19:46:41,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:41,203 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-23 19:46:41,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:46:41,203 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-23 19:46:41,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:41,204 INFO L225 Difference]: With dead ends: 16 [2018-09-23 19:46:41,204 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:46:41,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:46:41,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:46:41,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 19:46:41,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 19:46:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 19:46:41,209 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-23 19:46:41,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:41,209 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 19:46:41,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:46:41,209 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 19:46:41,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:46:41,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:41,210 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-23 19:46:41,210 INFO L423 AbstractCegarLoop]: === Iteration 13 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:41,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:41,211 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-23 19:46:41,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:41,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:41,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:41,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:41,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:41,473 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:41,473 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 [2018-09-23 19:46:41,481 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:46:41,493 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:46:41,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:41,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:41,536 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:41,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 19:46:41,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:46:41,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:46:41,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:46:41,537 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-23 19:46:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:41,810 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 19:46:41,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:46:41,811 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-23 19:46:41,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:41,811 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:46:41,811 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 19:46:41,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:46:41,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 19:46:41,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 19:46:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:46:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-23 19:46:41,816 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-23 19:46:41,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:41,816 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-23 19:46:41,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:46:41,817 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-23 19:46:41,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:46:41,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:41,817 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-23 19:46:41,818 INFO L423 AbstractCegarLoop]: === Iteration 14 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:41,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:41,818 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-23 19:46:41,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:41,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:41,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:41,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:41,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:42,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:42,120 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 [2018-09-23 19:46:42,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:42,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:42,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:42,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 19:46:42,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:46:42,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:46:42,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:46:42,171 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-23 19:46:42,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:42,510 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-23 19:46:42,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:46:42,510 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-23 19:46:42,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:42,511 INFO L225 Difference]: With dead ends: 18 [2018-09-23 19:46:42,511 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 19:46:42,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:46:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 19:46:42,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 19:46:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 19:46:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 19:46:42,516 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-23 19:46:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:42,516 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 19:46:42,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:46:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 19:46:42,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:46:42,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:42,517 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-23 19:46:42,518 INFO L423 AbstractCegarLoop]: === Iteration 15 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:42,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:42,518 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-23 19:46:42,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:42,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:42,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:42,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:42,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:42,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:42,837 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 [2018-09-23 19:46:42,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:46:42,863 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:46:42,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:42,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:42,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:42,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 19:46:42,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:46:42,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:46:42,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:46:42,898 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-23 19:46:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:43,247 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 19:46:43,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:46:43,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-23 19:46:43,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:43,249 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:46:43,249 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 19:46:43,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:46:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 19:46:43,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 19:46:43,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:46:43,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-23 19:46:43,255 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-23 19:46:43,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:43,255 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-23 19:46:43,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:46:43,256 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-23 19:46:43,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:46:43,256 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:43,257 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-23 19:46:43,257 INFO L423 AbstractCegarLoop]: === Iteration 16 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:43,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:43,257 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-23 19:46:43,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:43,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:43,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:43,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:43,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:43,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:43,520 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 [2018-09-23 19:46:43,529 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:46:43,550 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:46:43,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:43,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:43,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:43,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 19:46:43,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:46:43,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:46:43,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:46:43,588 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-23 19:46:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:43,781 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-23 19:46:43,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:46:43,781 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-23 19:46:43,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:43,782 INFO L225 Difference]: With dead ends: 20 [2018-09-23 19:46:43,782 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:46:43,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:46:43,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:46:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 19:46:43,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:46:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 19:46:43,788 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-23 19:46:43,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:43,788 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 19:46:43,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:46:43,789 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 19:46:43,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:46:43,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:43,789 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-23 19:46:43,790 INFO L423 AbstractCegarLoop]: === Iteration 17 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:43,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:43,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-23 19:46:43,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:43,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:43,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:43,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:43,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:44,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:44,093 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 [2018-09-23 19:46:44,100 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:46:44,110 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:46:44,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:44,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:44,149 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:44,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 19:46:44,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:46:44,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:46:44,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:46:44,151 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-23 19:46:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:44,481 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 19:46:44,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:46:44,481 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-23 19:46:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:44,482 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:46:44,483 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 19:46:44,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:46:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 19:46:44,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 19:46:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:46:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-23 19:46:44,487 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-23 19:46:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:44,488 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-23 19:46:44,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:46:44,488 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-23 19:46:44,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:46:44,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:44,489 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-23 19:46:44,489 INFO L423 AbstractCegarLoop]: === Iteration 18 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:44,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:44,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-23 19:46:44,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:44,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:44,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:44,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:44,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:44,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:44,968 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 [2018-09-23 19:46:44,975 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:46:44,984 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 19:46:44,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:44,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:45,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:45,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 19:46:45,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:46:45,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:46:45,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:46:45,075 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-23 19:46:45,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:45,376 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-23 19:46:45,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:46:45,376 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-23 19:46:45,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:45,377 INFO L225 Difference]: With dead ends: 22 [2018-09-23 19:46:45,377 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:46:45,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:46:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:46:45,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 19:46:45,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 19:46:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 19:46:45,383 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-23 19:46:45,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:45,383 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 19:46:45,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:46:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 19:46:45,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:46:45,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:45,384 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-23 19:46:45,385 INFO L423 AbstractCegarLoop]: === Iteration 19 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:45,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:45,385 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-23 19:46:45,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:45,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:45,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:45,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:45,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:45,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:45,786 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 [2018-09-23 19:46:45,795 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:46:45,841 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 19:46:45,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:45,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:45,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:45,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 19:46:45,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:46:45,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:46:45,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:46:45,878 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-23 19:46:46,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:46,190 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 19:46:46,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:46:46,191 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-23 19:46:46,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:46,192 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:46:46,192 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 19:46:46,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:46:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 19:46:46,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 19:46:46,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:46:46,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-23 19:46:46,197 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-23 19:46:46,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:46,198 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-23 19:46:46,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:46:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-23 19:46:46,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:46:46,199 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:46,199 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-23 19:46:46,199 INFO L423 AbstractCegarLoop]: === Iteration 20 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:46,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:46,199 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-23 19:46:46,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:46,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:46,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:46,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:46,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:46,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:46,563 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 [2018-09-23 19:46:46,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:46,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:46,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:46,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 19:46:46,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:46:46,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:46:46,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:46:46,618 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-23 19:46:47,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:47,111 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-23 19:46:47,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:46:47,111 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-23 19:46:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:47,112 INFO L225 Difference]: With dead ends: 24 [2018-09-23 19:46:47,113 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:46:47,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:46:47,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:46:47,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 19:46:47,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:46:47,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 19:46:47,119 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-23 19:46:47,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:47,119 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 19:46:47,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:46:47,119 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 19:46:47,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:46:47,120 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:47,120 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-23 19:46:47,120 INFO L423 AbstractCegarLoop]: === Iteration 21 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:47,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:47,121 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-23 19:46:47,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:47,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:47,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:47,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:47,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:47,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:47,869 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 [2018-09-23 19:46:47,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:46:47,886 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:46:47,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:47,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:47,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:47,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 19:46:47,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:46:47,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:46:47,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:46:47,923 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-23 19:46:48,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:48,275 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 19:46:48,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:46:48,276 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-23 19:46:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:48,277 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:46:48,277 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 19:46:48,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:46:48,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 19:46:48,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 19:46:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:46:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-23 19:46:48,282 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-23 19:46:48,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:48,282 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-23 19:46:48,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:46:48,282 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-23 19:46:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 19:46:48,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:48,283 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-23 19:46:48,284 INFO L423 AbstractCegarLoop]: === Iteration 22 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:48,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:48,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-23 19:46:48,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:48,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:48,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:48,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:48,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:48,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:48,762 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 [2018-09-23 19:46:48,770 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:46:48,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 19:46:48,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:48,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:48,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:48,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 19:46:48,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:46:48,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:46:48,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:46:48,825 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-23 19:46:49,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:49,229 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-23 19:46:49,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:46:49,232 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-23 19:46:49,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:49,233 INFO L225 Difference]: With dead ends: 26 [2018-09-23 19:46:49,233 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:46:49,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:46:49,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:46:49,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 19:46:49,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:46:49,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 19:46:49,238 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-23 19:46:49,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:49,238 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 19:46:49,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:46:49,238 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 19:46:49,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:46:49,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:49,239 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-23 19:46:49,239 INFO L423 AbstractCegarLoop]: === Iteration 23 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:49,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:49,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-23 19:46:49,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:49,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:49,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:49,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:49,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:49,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:49,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:46:49,695 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:46:49,704 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:46:49,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:49,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:49,753 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:49,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 19:46:49,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:46:49,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:46:49,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:46:49,754 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-23 19:46:50,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:50,167 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 19:46:50,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:46:50,167 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-23 19:46:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:50,168 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:46:50,168 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 19:46:50,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:46:50,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 19:46:50,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 19:46:50,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:46:50,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-23 19:46:50,174 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-23 19:46:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:50,175 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-23 19:46:50,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:46:50,175 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-23 19:46:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 19:46:50,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:50,176 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-23 19:46:50,176 INFO L423 AbstractCegarLoop]: === Iteration 24 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:50,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:50,176 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-23 19:46:50,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:50,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:50,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:50,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:50,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:50,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:50,649 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 [2018-09-23 19:46:50,656 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:46:50,667 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 19:46:50,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:50,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:50,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:50,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 19:46:50,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:46:50,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:46:50,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:46:50,711 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-23 19:46:51,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:51,641 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-23 19:46:51,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:46:51,641 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-23 19:46:51,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:51,642 INFO L225 Difference]: With dead ends: 28 [2018-09-23 19:46:51,642 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:46:51,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:46:51,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:46:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 19:46:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:46:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 19:46:51,647 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-23 19:46:51,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:51,648 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 19:46:51,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:46:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 19:46:51,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:46:51,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:51,648 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-23 19:46:51,649 INFO L423 AbstractCegarLoop]: === Iteration 25 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:51,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:51,649 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-23 19:46:51,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:51,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:51,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:51,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:51,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:52,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:52,386 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 [2018-09-23 19:46:52,393 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:46:52,406 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 19:46:52,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:52,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:52,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:52,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 19:46:52,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:46:52,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:46:52,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:46:52,438 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-23 19:46:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:52,931 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 19:46:52,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:46:52,931 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-23 19:46:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:52,932 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:46:52,932 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 19:46:52,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:46:52,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 19:46:52,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 19:46:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:46:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-23 19:46:52,937 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-23 19:46:52,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:52,937 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-23 19:46:52,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:46:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-23 19:46:52,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 19:46:52,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:52,938 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-23 19:46:52,939 INFO L423 AbstractCegarLoop]: === Iteration 26 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:52,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:52,939 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-23 19:46:52,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:52,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:52,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:52,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:52,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:53,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:53,413 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 [2018-09-23 19:46:53,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:53,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:53,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:53,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 19:46:53,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:46:53,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:46:53,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:46:53,467 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-23 19:46:53,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:53,944 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-23 19:46:53,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:46:53,945 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-23 19:46:53,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:53,945 INFO L225 Difference]: With dead ends: 30 [2018-09-23 19:46:53,946 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:46:53,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:46:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:46:53,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 19:46:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:46:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 19:46:53,951 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-23 19:46:53,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:53,952 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 19:46:53,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:46:53,952 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 19:46:53,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:46:53,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:53,953 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-23 19:46:53,953 INFO L423 AbstractCegarLoop]: === Iteration 27 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:53,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:53,953 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-23 19:46:53,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:53,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:53,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:53,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:53,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:54,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:54,470 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 [2018-09-23 19:46:54,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:46:54,484 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:46:54,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:54,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:54,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:54,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 19:46:54,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:46:54,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:46:54,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:46:54,532 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-23 19:46:55,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:55,022 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 19:46:55,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:46:55,022 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-23 19:46:55,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:55,023 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:46:55,023 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 19:46:55,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:46:55,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 19:46:55,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 19:46:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:46:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-23 19:46:55,028 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-23 19:46:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:55,029 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-23 19:46:55,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:46:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-23 19:46:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:46:55,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:55,029 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-23 19:46:55,030 INFO L423 AbstractCegarLoop]: === Iteration 28 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:55,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:55,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-23 19:46:55,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:55,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:55,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:55,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:55,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:55,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:55,516 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 [2018-09-23 19:46:55,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:46:55,544 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 19:46:55,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:55,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:55,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:55,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 19:46:55,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:46:55,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:46:55,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:46:55,577 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-23 19:46:56,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:56,271 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-23 19:46:56,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:46:56,272 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-23 19:46:56,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:56,273 INFO L225 Difference]: With dead ends: 32 [2018-09-23 19:46:56,273 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:46:56,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:46:56,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:46:56,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 19:46:56,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:46:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 19:46:56,278 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-23 19:46:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:56,278 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 19:46:56,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:46:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 19:46:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:46:56,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:56,279 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-23 19:46:56,279 INFO L423 AbstractCegarLoop]: === Iteration 29 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:56,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:56,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-23 19:46:56,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:56,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:56,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:56,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:56,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:56,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:56,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:46:56,848 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:46:56,857 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:46:56,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:56,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:56,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:56,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 19:46:56,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:46:56,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:46:56,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:46:56,901 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-23 19:46:57,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:57,614 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 19:46:57,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:46:57,614 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-23 19:46:57,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:57,615 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:46:57,615 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 19:46:57,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:46:57,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 19:46:57,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 19:46:57,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:46:57,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-23 19:46:57,621 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-23 19:46:57,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:57,622 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-23 19:46:57,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:46:57,622 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-23 19:46:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 19:46:57,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:57,622 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-23 19:46:57,623 INFO L423 AbstractCegarLoop]: === Iteration 30 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:57,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:57,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-23 19:46:57,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:57,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:57,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:57,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:57,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:58,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:58,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:46:58,254 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:46:58,266 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 19:46:58,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:58,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:58,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:58,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 19:46:58,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:46:58,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:46:58,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:46:58,310 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-23 19:46:58,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:58,940 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-23 19:46:58,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:46:58,940 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-23 19:46:58,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:58,941 INFO L225 Difference]: With dead ends: 34 [2018-09-23 19:46:58,941 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:46:58,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:46:58,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:46:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 19:46:58,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 19:46:58,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 19:46:58,947 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-23 19:46:58,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:58,948 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 19:46:58,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:46:58,948 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 19:46:58,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:46:58,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:58,949 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-23 19:46:58,949 INFO L423 AbstractCegarLoop]: === Iteration 31 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:58,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:58,949 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-23 19:46:58,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:58,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:58,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:58,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:58,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:59,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:59,557 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 [2018-09-23 19:46:59,565 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:46:59,580 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 19:46:59,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:59,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:59,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:59,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 19:46:59,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:46:59,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:46:59,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:46:59,628 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-23 19:47:00,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:00,251 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 19:47:00,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:47:00,252 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-23 19:47:00,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:00,252 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:47:00,253 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 19:47:00,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:47:00,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 19:47:00,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 19:47:00,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:47:00,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-23 19:47:00,257 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-23 19:47:00,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:00,257 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-23 19:47:00,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:47:00,257 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-23 19:47:00,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:47:00,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:00,258 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-23 19:47:00,258 INFO L423 AbstractCegarLoop]: === Iteration 32 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:00,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:00,258 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-23 19:47:00,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:00,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:00,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:00,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:00,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:01,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:01,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:47:01,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:01,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:01,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:01,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 19:47:01,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:47:01,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:47:01,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:47:01,864 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-23 19:47:02,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:02,747 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-23 19:47:02,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:47:02,748 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-23 19:47:02,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:02,749 INFO L225 Difference]: With dead ends: 36 [2018-09-23 19:47:02,749 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:47:02,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:47:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:47:02,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 19:47:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:47:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 19:47:02,755 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-23 19:47:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:02,755 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 19:47:02,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:47:02,755 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 19:47:02,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:47:02,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:02,756 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-23 19:47:02,756 INFO L423 AbstractCegarLoop]: === Iteration 33 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:02,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:02,756 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-23 19:47:02,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:02,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:02,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:02,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:02,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:03,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:03,417 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 [2018-09-23 19:47:03,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:47:03,437 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:47:03,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:03,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:03,519 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:03,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 19:47:03,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:47:03,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:47:03,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:47:03,520 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-23 19:47:04,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:04,358 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 19:47:04,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:47:04,359 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-23 19:47:04,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:04,360 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:47:04,360 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 19:47:04,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:47:04,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 19:47:04,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 19:47:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 19:47:04,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-23 19:47:04,366 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-23 19:47:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:04,366 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-23 19:47:04,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:47:04,366 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-23 19:47:04,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 19:47:04,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:04,367 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-23 19:47:04,367 INFO L423 AbstractCegarLoop]: === Iteration 34 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:04,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:04,367 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-23 19:47:04,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:04,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:04,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:04,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:04,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:05,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:05,080 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 [2018-09-23 19:47:05,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:47:05,106 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 19:47:05,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:05,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:05,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:05,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 19:47:05,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:47:05,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:47:05,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:47:05,148 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-23 19:47:05,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:05,930 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-23 19:47:05,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:47:05,930 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-23 19:47:05,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:05,931 INFO L225 Difference]: With dead ends: 38 [2018-09-23 19:47:05,931 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:47:05,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:47:05,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:47:05,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 19:47:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:47:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 19:47:05,937 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-23 19:47:05,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:05,938 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 19:47:05,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:47:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 19:47:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 19:47:05,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:05,938 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-23 19:47:05,939 INFO L423 AbstractCegarLoop]: === Iteration 35 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:05,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:05,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-23 19:47:05,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:05,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:05,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:05,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:05,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:06,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:06,986 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 [2018-09-23 19:47:06,994 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:47:07,006 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:47:07,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:07,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:07,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:07,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 19:47:07,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:47:07,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:47:07,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:47:07,050 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-23 19:47:08,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:08,011 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 19:47:08,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:47:08,011 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-23 19:47:08,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:08,012 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:47:08,012 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 19:47:08,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:47:08,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 19:47:08,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 19:47:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 19:47:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-23 19:47:08,016 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-23 19:47:08,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:08,017 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-23 19:47:08,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:47:08,017 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-23 19:47:08,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 19:47:08,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:08,017 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-23 19:47:08,018 INFO L423 AbstractCegarLoop]: === Iteration 36 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:08,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:08,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-23 19:47:08,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:08,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:08,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:08,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:08,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:08,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:08,846 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 [2018-09-23 19:47:08,853 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:47:08,871 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 19:47:08,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:08,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:08,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:08,901 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 19:47:08,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:47:08,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:47:08,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:47:08,902 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-23 19:47:09,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:09,739 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-23 19:47:09,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:47:09,739 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-23 19:47:09,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:09,740 INFO L225 Difference]: With dead ends: 40 [2018-09-23 19:47:09,740 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:47:09,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:47:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:47:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 19:47:09,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:47:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 19:47:09,748 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-23 19:47:09,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:09,748 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 19:47:09,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:47:09,748 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 19:47:09,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:47:09,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:09,749 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-23 19:47:09,749 INFO L423 AbstractCegarLoop]: === Iteration 37 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:09,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:09,749 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-23 19:47:09,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:09,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:09,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:09,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:09,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:10,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:10,811 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 [2018-09-23 19:47:10,819 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:47:10,837 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:47:10,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:10,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:10,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:10,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 19:47:10,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:47:10,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:47:10,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:47:10,869 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-23 19:47:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:11,750 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 19:47:11,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:47:11,750 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-23 19:47:11,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:11,751 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:47:11,751 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 19:47:11,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:47:11,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 19:47:11,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 19:47:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 19:47:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-23 19:47:11,756 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-23 19:47:11,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:11,756 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-23 19:47:11,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:47:11,756 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-23 19:47:11,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 19:47:11,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:11,757 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-23 19:47:11,757 INFO L423 AbstractCegarLoop]: === Iteration 38 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:11,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:11,758 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-23 19:47:11,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:11,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:11,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:11,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:11,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:13,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:13,299 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 [2018-09-23 19:47:13,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:13,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:13,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:13,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 19:47:13,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:47:13,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:47:13,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:47:13,349 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-23 19:47:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:14,276 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-23 19:47:14,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:47:14,277 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-23 19:47:14,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:14,278 INFO L225 Difference]: With dead ends: 42 [2018-09-23 19:47:14,278 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:47:14,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:47:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:47:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 19:47:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 19:47:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 19:47:14,282 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-23 19:47:14,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:14,282 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 19:47:14,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:47:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 19:47:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 19:47:14,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:14,283 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-23 19:47:14,283 INFO L423 AbstractCegarLoop]: === Iteration 39 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:14,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:14,283 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-23 19:47:14,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:14,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:14,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:14,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:14,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:15,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:15,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:47:15,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:47:15,912 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:47:15,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:15,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:15,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:15,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 19:47:15,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:47:15,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:47:15,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:47:15,977 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-23 19:47:16,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:16,968 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 19:47:16,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:47:16,968 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-23 19:47:16,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:16,969 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:47:16,969 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 19:47:16,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:47:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 19:47:16,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 19:47:16,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 19:47:16,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-23 19:47:16,973 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-23 19:47:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:16,973 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-23 19:47:16,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:47:16,974 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-23 19:47:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 19:47:16,974 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:16,974 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-23 19:47:16,974 INFO L423 AbstractCegarLoop]: === Iteration 40 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:16,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:16,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-23 19:47:16,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:16,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:16,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:16,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:16,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:18,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:18,300 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 [2018-09-23 19:47:18,308 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:47:18,328 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 19:47:18,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:18,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:18,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:18,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 19:47:18,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:47:18,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:47:18,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:47:18,371 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-23 19:47:19,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:19,419 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-23 19:47:19,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:47:19,420 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-23 19:47:19,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:19,420 INFO L225 Difference]: With dead ends: 44 [2018-09-23 19:47:19,420 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:47:19,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:47:19,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:47:19,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 19:47:19,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:47:19,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 19:47:19,426 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-23 19:47:19,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:19,426 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 19:47:19,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:47:19,426 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 19:47:19,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:47:19,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:19,427 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-23 19:47:19,427 INFO L423 AbstractCegarLoop]: === Iteration 41 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:19,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:19,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-23 19:47:19,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:19,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:19,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:19,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:19,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:20,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:20,345 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 [2018-09-23 19:47:20,352 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:47:20,363 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:47:20,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:20,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:20,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:20,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 19:47:20,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:47:20,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:47:20,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:47:20,396 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-23 19:47:21,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:21,459 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 19:47:21,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:47:21,459 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-23 19:47:21,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:21,460 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:47:21,460 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 19:47:21,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:47:21,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 19:47:21,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 19:47:21,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 19:47:21,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-23 19:47:21,464 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-23 19:47:21,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:21,464 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-23 19:47:21,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:47:21,464 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-23 19:47:21,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 19:47:21,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:21,465 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-23 19:47:21,465 INFO L423 AbstractCegarLoop]: === Iteration 42 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:21,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:21,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-23 19:47:21,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:21,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:21,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:21,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:21,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:23,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:23,683 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 [2018-09-23 19:47:23,695 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:47:23,729 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 19:47:23,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:23,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:23,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:23,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 19:47:23,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:47:23,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:47:23,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:47:23,764 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-23 19:47:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:24,896 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-23 19:47:24,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:47:24,896 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-23 19:47:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:24,897 INFO L225 Difference]: With dead ends: 46 [2018-09-23 19:47:24,897 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:47:24,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:47:24,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:47:24,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 19:47:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 19:47:24,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 19:47:24,902 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-23 19:47:24,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:24,902 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 19:47:24,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:47:24,902 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 19:47:24,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:47:24,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:24,903 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-23 19:47:24,903 INFO L423 AbstractCegarLoop]: === Iteration 43 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:24,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:24,903 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-23 19:47:24,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:24,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:24,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:24,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:24,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:25,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:25,915 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 [2018-09-23 19:47:25,924 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:47:25,943 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 19:47:25,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:25,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:25,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:25,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 19:47:25,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:47:25,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:47:25,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:47:25,984 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-23 19:47:27,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:27,201 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 19:47:27,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:47:27,202 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-23 19:47:27,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:27,203 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:47:27,203 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 19:47:27,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:47:27,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 19:47:27,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 19:47:27,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 19:47:27,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-23 19:47:27,207 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-23 19:47:27,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:27,207 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-23 19:47:27,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:47:27,208 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-23 19:47:27,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 19:47:27,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:27,208 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-23 19:47:27,208 INFO L423 AbstractCegarLoop]: === Iteration 44 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:27,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-23 19:47:27,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:27,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:27,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:27,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:27,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:28,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:28,675 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 [2018-09-23 19:47:28,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:28,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:28,730 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:28,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 19:47:28,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:47:28,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:47:28,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:47:28,732 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-23 19:47:29,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:29,961 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-23 19:47:29,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:47:29,962 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-23 19:47:29,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:29,963 INFO L225 Difference]: With dead ends: 48 [2018-09-23 19:47:29,963 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:47:29,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:47:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:47:29,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 19:47:29,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:47:29,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 19:47:29,967 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-23 19:47:29,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:29,967 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 19:47:29,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:47:29,967 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 19:47:29,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:47:29,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:29,968 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-23 19:47:29,968 INFO L423 AbstractCegarLoop]: === Iteration 45 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:29,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:29,968 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-23 19:47:29,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:29,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:29,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:29,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:29,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:31,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:31,146 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 [2018-09-23 19:47:31,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:47:31,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:47:31,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:31,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:31,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:31,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 19:47:31,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:47:31,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:47:31,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:47:31,209 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-23 19:47:32,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:32,503 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 19:47:32,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:47:32,504 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-23 19:47:32,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:32,505 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:47:32,505 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 19:47:32,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:47:32,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 19:47:32,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 19:47:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 19:47:32,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-23 19:47:32,509 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-23 19:47:32,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:32,509 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-23 19:47:32,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:47:32,509 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-23 19:47:32,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 19:47:32,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:32,510 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-09-23 19:47:32,510 INFO L423 AbstractCegarLoop]: === Iteration 46 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:32,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:32,511 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-09-23 19:47:32,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:32,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:32,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:32,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:32,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:33,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:33,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:47:33,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:47:34,006 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 19:47:34,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:34,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:34,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:34,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 19:47:34,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:47:34,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:47:34,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:47:34,064 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-23 19:47:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:35,413 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-23 19:47:35,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:47:35,414 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-23 19:47:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:35,415 INFO L225 Difference]: With dead ends: 50 [2018-09-23 19:47:35,415 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:47:35,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:47:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:47:35,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 19:47:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:47:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 19:47:35,419 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-23 19:47:35,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:35,419 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 19:47:35,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:47:35,420 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 19:47:35,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:47:35,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:35,420 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-09-23 19:47:35,420 INFO L423 AbstractCegarLoop]: === Iteration 47 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:35,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:35,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-09-23 19:47:35,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:35,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:35,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:35,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:35,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:36,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:36,714 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 [2018-09-23 19:47:36,724 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:47:36,740 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:47:36,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:36,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:36,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:36,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 19:47:36,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:47:36,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:47:36,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:47:36,774 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-23 19:47:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:38,335 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 19:47:38,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:47:38,336 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-23 19:47:38,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:38,337 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:47:38,337 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 19:47:38,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:47:38,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 19:47:38,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 19:47:38,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 19:47:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-23 19:47:38,341 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-23 19:47:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:38,341 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-23 19:47:38,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:47:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-23 19:47:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 19:47:38,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:38,342 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-09-23 19:47:38,342 INFO L423 AbstractCegarLoop]: === Iteration 48 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:38,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:38,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-09-23 19:47:38,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:38,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:38,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:38,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:38,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:39,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:39,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:47:39,534 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:47:39,556 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 19:47:39,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:39,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:39,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:39,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 19:47:39,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:47:39,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:47:39,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:47:39,596 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-23 19:47:41,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:41,091 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-23 19:47:41,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:47:41,091 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-23 19:47:41,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:41,092 INFO L225 Difference]: With dead ends: 52 [2018-09-23 19:47:41,092 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:47:41,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:47:41,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:47:41,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 19:47:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:47:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 19:47:41,096 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-23 19:47:41,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:41,096 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 19:47:41,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:47:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 19:47:41,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:47:41,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:41,097 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-09-23 19:47:41,098 INFO L423 AbstractCegarLoop]: === Iteration 49 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:41,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:41,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-09-23 19:47:41,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:41,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:41,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:41,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:41,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:42,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:42,371 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 [2018-09-23 19:47:42,379 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:47:42,404 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 19:47:42,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:42,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:42,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:42,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 19:47:42,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:47:42,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:47:42,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:47:42,437 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-23 19:47:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:44,122 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 19:47:44,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:47:44,122 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-23 19:47:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:44,123 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:47:44,123 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 19:47:44,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:47:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 19:47:44,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 19:47:44,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 19:47:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-23 19:47:44,129 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-23 19:47:44,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:44,129 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-23 19:47:44,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:47:44,130 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-23 19:47:44,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 19:47:44,130 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:44,130 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-09-23 19:47:44,130 INFO L423 AbstractCegarLoop]: === Iteration 50 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:44,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:44,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-09-23 19:47:44,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:44,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:44,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:44,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:44,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:45,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:45,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:47:45,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:45,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:45,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:45,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 19:47:45,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:47:45,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:47:45,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:47:45,459 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-23 19:47:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:47,039 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-23 19:47:47,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:47:47,039 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-23 19:47:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:47,040 INFO L225 Difference]: With dead ends: 54 [2018-09-23 19:47:47,041 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:47:47,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:47:47,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:47:47,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 19:47:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 19:47:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 19:47:47,046 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-23 19:47:47,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:47,046 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 19:47:47,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:47:47,046 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 19:47:47,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 19:47:47,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:47,047 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-09-23 19:47:47,047 INFO L423 AbstractCegarLoop]: === Iteration 51 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:47,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:47,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-09-23 19:47:47,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:47,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:47,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:47,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:47,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:49,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:49,246 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 [2018-09-23 19:47:49,254 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:47:49,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:47:49,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:49,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:49,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:49,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 19:47:49,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:47:49,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:47:49,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:47:49,321 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-23 19:47:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:51,094 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 19:47:51,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:47:51,095 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-23 19:47:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:51,096 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:47:51,096 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 19:47:51,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:47:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 19:47:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 19:47:51,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 19:47:51,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-23 19:47:51,100 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-23 19:47:51,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:51,101 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-23 19:47:51,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:47:51,101 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-23 19:47:51,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 19:47:51,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:51,101 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-09-23 19:47:51,102 INFO L423 AbstractCegarLoop]: === Iteration 52 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:51,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:51,102 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-09-23 19:47:51,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:51,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:51,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:51,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:51,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:52,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:52,505 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 [2018-09-23 19:47:52,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:47:52,538 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 19:47:52,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:52,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:52,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:52,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 19:47:52,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:47:52,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:47:52,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:47:52,577 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-23 19:47:54,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:54,475 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-23 19:47:54,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:47:54,476 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-23 19:47:54,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:54,477 INFO L225 Difference]: With dead ends: 56 [2018-09-23 19:47:54,477 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:47:54,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:47:54,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:47:54,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 19:47:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 19:47:54,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 19:47:54,481 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-23 19:47:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:54,481 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 19:47:54,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:47:54,482 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 19:47:54,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 19:47:54,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:54,482 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-09-23 19:47:54,482 INFO L423 AbstractCegarLoop]: === Iteration 53 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:54,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:54,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-09-23 19:47:54,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:54,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:54,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:54,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:54,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:56,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:56,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:47:56,560 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:47:56,577 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:47:56,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:56,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:56,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:56,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 19:47:56,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:47:56,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:47:56,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:47:56,614 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-23 19:47:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:58,439 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 19:47:58,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:47:58,439 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-23 19:47:58,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:58,439 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:47:58,440 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 19:47:58,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:47:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 19:47:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 19:47:58,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 19:47:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-23 19:47:58,444 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-23 19:47:58,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:58,444 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-23 19:47:58,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:47:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-23 19:47:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 19:47:58,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:58,445 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-09-23 19:47:58,446 INFO L423 AbstractCegarLoop]: === Iteration 54 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:58,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:58,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-09-23 19:47:58,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:58,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:58,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:58,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:58,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:59,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:59,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:47:59,986 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:00,019 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 19:48:00,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:00,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:00,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:00,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 19:48:00,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:48:00,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:48:00,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:48:00,055 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-23 19:48:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:01,918 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-23 19:48:01,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:48:01,919 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-23 19:48:01,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:01,920 INFO L225 Difference]: With dead ends: 58 [2018-09-23 19:48:01,920 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:48:01,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:48:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:48:01,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 19:48:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 19:48:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 19:48:01,924 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-23 19:48:01,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:01,925 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 19:48:01,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:48:01,925 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 19:48:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:48:01,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:01,926 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-09-23 19:48:01,926 INFO L423 AbstractCegarLoop]: === Iteration 55 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:01,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:01,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-09-23 19:48:01,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:01,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:01,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:01,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:01,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:04,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:04,146 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 [2018-09-23 19:48:04,154 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:04,182 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-23 19:48:04,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:04,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:04,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:04,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 19:48:04,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:48:04,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:48:04,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:48:04,225 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-23 19:48:06,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:06,125 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 19:48:06,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:48:06,125 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-23 19:48:06,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:06,126 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:48:06,126 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 19:48:06,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:48:06,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 19:48:06,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 19:48:06,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 19:48:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-23 19:48:06,131 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-23 19:48:06,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:06,131 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-23 19:48:06,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:48:06,131 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-23 19:48:06,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 19:48:06,131 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:06,131 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-09-23 19:48:06,132 INFO L423 AbstractCegarLoop]: === Iteration 56 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:06,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:06,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-09-23 19:48:06,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:06,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:06,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:06,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:06,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:07,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:07,720 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 [2018-09-23 19:48:07,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:07,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:07,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:07,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 19:48:07,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:48:07,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:48:07,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:48:07,780 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-23 19:48:09,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:09,923 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-23 19:48:09,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:48:09,924 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-23 19:48:09,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:09,924 INFO L225 Difference]: With dead ends: 60 [2018-09-23 19:48:09,924 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:48:09,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:48:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:48:09,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 19:48:09,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:48:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 19:48:09,929 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-23 19:48:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:09,930 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 19:48:09,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:48:09,930 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 19:48:09,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:48:09,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:09,930 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-09-23 19:48:09,931 INFO L423 AbstractCegarLoop]: === Iteration 57 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:09,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:09,931 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-09-23 19:48:09,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:09,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:09,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:09,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:09,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:11,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:11,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:11,705 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:11,724 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:11,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:11,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:11,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:11,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 19:48:11,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:48:11,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:48:11,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:48:11,760 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-23 19:48:13,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:13,930 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 19:48:13,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:48:13,930 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-23 19:48:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:13,931 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:48:13,931 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 19:48:13,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:48:13,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 19:48:13,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 19:48:13,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 19:48:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-23 19:48:13,937 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-23 19:48:13,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:13,937 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-23 19:48:13,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:48:13,937 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-23 19:48:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 19:48:13,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:13,938 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-09-23 19:48:13,938 INFO L423 AbstractCegarLoop]: === Iteration 58 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:13,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:13,938 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-09-23 19:48:13,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:13,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:13,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:13,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:13,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:15,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:15,779 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 [2018-09-23 19:48:15,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:15,824 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 19:48:15,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:15,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:15,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:15,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 19:48:15,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:48:15,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:48:15,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:48:15,861 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-23 19:48:18,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:18,001 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-23 19:48:18,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:48:18,001 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-23 19:48:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:18,002 INFO L225 Difference]: With dead ends: 62 [2018-09-23 19:48:18,003 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 19:48:18,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:48:18,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 19:48:18,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 19:48:18,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 19:48:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 19:48:18,008 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-23 19:48:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:18,008 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 19:48:18,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:48:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 19:48:18,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 19:48:18,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:18,009 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-09-23 19:48:18,009 INFO L423 AbstractCegarLoop]: === Iteration 59 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:18,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:18,009 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-09-23 19:48:18,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:18,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:18,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:18,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:18,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:20,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:20,146 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 [2018-09-23 19:48:20,157 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:20,174 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:20,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:20,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:20,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:20,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 19:48:20,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 19:48:20,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 19:48:20,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:48:20,210 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-23 19:48:22,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:22,424 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 19:48:22,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:48:22,425 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-23 19:48:22,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:22,426 INFO L225 Difference]: With dead ends: 63 [2018-09-23 19:48:22,426 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 19:48:22,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:48:22,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 19:48:22,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-23 19:48:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 19:48:22,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-23 19:48:22,430 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-23 19:48:22,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:22,430 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-23 19:48:22,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 19:48:22,431 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-23 19:48:22,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 19:48:22,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:22,431 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-09-23 19:48:22,431 INFO L423 AbstractCegarLoop]: === Iteration 60 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:22,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:22,431 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-09-23 19:48:22,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:22,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:22,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:22,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:22,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:24,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:24,413 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 [2018-09-23 19:48:24,420 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:24,451 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 19:48:24,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:24,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:24,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:24,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 19:48:24,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:48:24,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:48:24,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:48:24,490 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-23 19:48:26,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:26,742 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-23 19:48:26,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:48:26,742 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-23 19:48:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:26,743 INFO L225 Difference]: With dead ends: 64 [2018-09-23 19:48:26,743 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:48:26,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:48:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:48:26,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 19:48:26,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 19:48:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 19:48:26,747 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-23 19:48:26,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:26,747 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 19:48:26,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:48:26,748 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 19:48:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:48:26,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:26,748 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-09-23 19:48:26,748 INFO L423 AbstractCegarLoop]: === Iteration 61 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:26,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:26,749 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-09-23 19:48:26,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:26,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:26,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:26,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:26,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:28,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:28,688 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 [2018-09-23 19:48:28,696 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:28,728 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 19:48:28,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:28,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:28,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:28,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 19:48:28,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 19:48:28,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 19:48:28,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:48:28,766 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-23 19:48:31,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:31,294 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 19:48:31,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:48:31,295 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-23 19:48:31,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:31,296 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:48:31,296 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 19:48:31,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:48:31,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 19:48:31,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 19:48:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 19:48:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-23 19:48:31,299 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-23 19:48:31,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:31,300 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-23 19:48:31,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 19:48:31,300 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-23 19:48:31,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 19:48:31,300 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:31,300 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-09-23 19:48:31,300 INFO L423 AbstractCegarLoop]: === Iteration 62 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:31,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:31,300 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-09-23 19:48:31,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:31,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:31,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:31,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:31,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:33,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:33,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:33,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:33,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:33,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:33,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 19:48:33,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:48:33,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:48:33,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:48:33,345 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-23 19:48:36,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:36,025 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-23 19:48:36,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:48:36,025 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-23 19:48:36,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:36,026 INFO L225 Difference]: With dead ends: 66 [2018-09-23 19:48:36,026 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 19:48:36,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:48:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 19:48:36,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 19:48:36,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 19:48:36,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-23 19:48:36,031 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-23 19:48:36,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:36,031 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-23 19:48:36,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:48:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-23 19:48:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 19:48:36,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:36,032 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-09-23 19:48:36,032 INFO L423 AbstractCegarLoop]: === Iteration 63 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:36,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:36,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-09-23 19:48:36,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:36,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:36,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:36,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:36,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:38,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:38,024 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 [2018-09-23 19:48:38,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:38,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:38,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:38,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:38,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:38,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 19:48:38,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:48:38,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:48:38,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:48:38,103 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-23 19:48:40,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:40,820 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 19:48:40,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:48:40,820 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-23 19:48:40,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:40,821 INFO L225 Difference]: With dead ends: 67 [2018-09-23 19:48:40,821 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 19:48:40,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:48:40,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 19:48:40,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 19:48:40,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 19:48:40,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-23 19:48:40,827 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-23 19:48:40,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:40,828 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-23 19:48:40,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:48:40,828 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-23 19:48:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 19:48:40,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:40,828 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-09-23 19:48:40,829 INFO L423 AbstractCegarLoop]: === Iteration 64 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:40,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:40,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-09-23 19:48:40,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:40,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:40,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:40,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:40,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:42,826 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:42,826 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 [2018-09-23 19:48:42,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:42,868 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-23 19:48:42,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:42,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:42,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:42,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 19:48:42,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:48:42,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:48:42,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:48:42,923 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-23 19:48:46,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:46,041 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-23 19:48:46,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:48:46,041 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-23 19:48:46,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:46,042 INFO L225 Difference]: With dead ends: 68 [2018-09-23 19:48:46,042 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:48:46,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:48:46,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:48:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 19:48:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:48:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-23 19:48:46,047 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-23 19:48:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:46,048 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-23 19:48:46,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:48:46,048 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-23 19:48:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:48:46,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:46,049 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-09-23 19:48:46,049 INFO L423 AbstractCegarLoop]: === Iteration 65 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:46,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:46,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-09-23 19:48:46,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:46,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:46,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:46,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:46,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:48,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:48,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:48,125 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:48,144 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:48,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:48,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:48,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:48,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 19:48:48,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 19:48:48,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 19:48:48,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:48:48,195 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-23 19:48:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:51,088 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 19:48:51,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:48:51,089 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-23 19:48:51,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:51,089 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:48:51,090 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 19:48:51,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:48:51,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 19:48:51,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 19:48:51,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 19:48:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-23 19:48:51,094 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-23 19:48:51,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:51,094 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-23 19:48:51,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 19:48:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-23 19:48:51,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 19:48:51,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:51,095 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-09-23 19:48:51,095 INFO L423 AbstractCegarLoop]: === Iteration 66 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:51,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:51,095 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-09-23 19:48:51,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:51,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:51,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:51,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:51,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:53,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:53,248 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 [2018-09-23 19:48:53,256 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:53,288 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-23 19:48:53,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:53,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:53,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:53,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 19:48:53,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:48:53,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:48:53,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:48:53,328 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-23 19:48:56,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:56,221 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-23 19:48:56,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:48:56,221 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-23 19:48:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:56,222 INFO L225 Difference]: With dead ends: 70 [2018-09-23 19:48:56,223 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 19:48:56,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:48:56,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 19:48:56,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 19:48:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 19:48:56,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-23 19:48:56,228 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-23 19:48:56,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:56,228 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-23 19:48:56,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:48:56,228 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-23 19:48:56,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:48:56,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:56,229 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-09-23 19:48:56,229 INFO L423 AbstractCegarLoop]: === Iteration 67 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:56,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:56,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-09-23 19:48:56,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:56,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:56,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:56,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:56,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:58,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:58,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:58,521 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:58,623 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-23 19:48:58,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:58,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:58,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:58,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 19:48:58,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 19:48:58,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 19:48:58,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:48:58,668 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-23 19:49:01,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:01,684 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 19:49:01,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:49:01,684 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-23 19:49:01,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:01,685 INFO L225 Difference]: With dead ends: 71 [2018-09-23 19:49:01,685 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 19:49:01,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:49:01,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 19:49:01,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 19:49:01,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 19:49:01,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-23 19:49:01,689 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-23 19:49:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:01,690 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-23 19:49:01,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 19:49:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-23 19:49:01,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 19:49:01,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:01,690 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-09-23 19:49:01,691 INFO L423 AbstractCegarLoop]: === Iteration 68 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:01,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:01,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-09-23 19:49:01,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:01,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:01,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:01,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:01,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:03,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:03,939 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 [2018-09-23 19:49:03,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:03,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:04,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:04,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 19:49:04,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:49:04,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:49:04,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:49:04,007 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-23 19:49:07,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:07,080 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-23 19:49:07,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:49:07,081 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-23 19:49:07,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:07,082 INFO L225 Difference]: With dead ends: 72 [2018-09-23 19:49:07,082 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 19:49:07,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:49:07,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 19:49:07,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 19:49:07,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 19:49:07,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-23 19:49:07,086 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-23 19:49:07,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:07,086 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-23 19:49:07,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:49:07,086 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-23 19:49:07,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 19:49:07,087 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:07,087 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-09-23 19:49:07,087 INFO L423 AbstractCegarLoop]: === Iteration 69 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:07,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:07,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-09-23 19:49:07,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:07,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:07,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:07,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:07,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:09,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:09,405 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 [2018-09-23 19:49:09,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:09,434 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:09,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:09,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:09,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:09,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 19:49:09,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:49:09,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:49:09,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:49:09,474 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-23 19:49:12,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:12,615 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 19:49:12,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:49:12,616 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-23 19:49:12,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:12,617 INFO L225 Difference]: With dead ends: 73 [2018-09-23 19:49:12,617 INFO L226 Difference]: Without dead ends: 72 [2018-09-23 19:49:12,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:49:12,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-23 19:49:12,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-23 19:49:12,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 19:49:12,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-23 19:49:12,621 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-23 19:49:12,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:12,621 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-23 19:49:12,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:49:12,622 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-23 19:49:12,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 19:49:12,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:12,622 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-09-23 19:49:12,622 INFO L423 AbstractCegarLoop]: === Iteration 70 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:12,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:12,623 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-09-23 19:49:12,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:12,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:12,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:12,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:12,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:14,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:14,946 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 [2018-09-23 19:49:14,953 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:14,992 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-23 19:49:14,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:14,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:15,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:15,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:15,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 19:49:15,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 19:49:15,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 19:49:15,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:49:15,047 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-23 19:49:18,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:18,734 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-23 19:49:18,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 19:49:18,735 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-23 19:49:18,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:18,736 INFO L225 Difference]: With dead ends: 74 [2018-09-23 19:49:18,736 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 19:49:18,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:49:18,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 19:49:18,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 19:49:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 19:49:18,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-23 19:49:18,741 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-23 19:49:18,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:18,742 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-23 19:49:18,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 19:49:18,742 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-23 19:49:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 19:49:18,742 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:18,742 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-09-23 19:49:18,743 INFO L423 AbstractCegarLoop]: === Iteration 71 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:18,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:18,743 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-09-23 19:49:18,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:18,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:18,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:18,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:18,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:21,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:21,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:21,397 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:21,421 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:21,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:21,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:21,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:21,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 19:49:21,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 19:49:21,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 19:49:21,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:49:21,462 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-23 19:49:25,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:25,730 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 19:49:25,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:49:25,730 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-23 19:49:25,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:25,731 INFO L225 Difference]: With dead ends: 75 [2018-09-23 19:49:25,731 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 19:49:25,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:49:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 19:49:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-23 19:49:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 19:49:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-23 19:49:25,736 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-23 19:49:25,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:25,736 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-23 19:49:25,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 19:49:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-23 19:49:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 19:49:25,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:25,737 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-09-23 19:49:25,737 INFO L423 AbstractCegarLoop]: === Iteration 72 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:25,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:25,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-09-23 19:49:25,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:25,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:25,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:25,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:25,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:28,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:28,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:28,262 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:28,392 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 19:49:28,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:28,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:28,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:28,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 19:49:28,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 19:49:28,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 19:49:28,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:49:28,455 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-23 19:49:31,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:31,893 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-23 19:49:31,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:49:31,893 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-23 19:49:31,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:31,894 INFO L225 Difference]: With dead ends: 76 [2018-09-23 19:49:31,894 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 19:49:31,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:49:31,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 19:49:31,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 19:49:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 19:49:31,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-23 19:49:31,900 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-23 19:49:31,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:31,901 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-23 19:49:31,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 19:49:31,901 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-23 19:49:31,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:49:31,901 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:31,902 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-09-23 19:49:31,902 INFO L423 AbstractCegarLoop]: === Iteration 73 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:31,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:31,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-09-23 19:49:31,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:31,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:31,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:31,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:31,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:34,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:34,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:34,406 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:34,623 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 19:49:34,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:34,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:34,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:34,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 19:49:34,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 19:49:34,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 19:49:34,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:49:34,713 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-23 19:49:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:38,308 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 19:49:38,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:49:38,308 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-23 19:49:38,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:38,309 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:49:38,309 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 19:49:38,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:49:38,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 19:49:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 19:49:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 19:49:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-23 19:49:38,317 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-23 19:49:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:38,317 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-23 19:49:38,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 19:49:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-23 19:49:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-23 19:49:38,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:38,318 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-09-23 19:49:38,318 INFO L423 AbstractCegarLoop]: === Iteration 74 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:38,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:38,318 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-09-23 19:49:38,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:38,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:38,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:38,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:38,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:41,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:41,848 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 [2018-09-23 19:49:41,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:41,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:41,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:41,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 19:49:41,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 19:49:41,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 19:49:41,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:49:41,947 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-23 19:49:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:45,447 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-23 19:49:45,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 19:49:45,448 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-23 19:49:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:45,449 INFO L225 Difference]: With dead ends: 78 [2018-09-23 19:49:45,449 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 19:49:45,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:49:45,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 19:49:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 19:49:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 19:49:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-23 19:49:45,454 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-23 19:49:45,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:45,454 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-23 19:49:45,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 19:49:45,455 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-23 19:49:45,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 19:49:45,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:45,455 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-09-23 19:49:45,456 INFO L423 AbstractCegarLoop]: === Iteration 75 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:45,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:45,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-09-23 19:49:45,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:45,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:45,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:45,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:45,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:49,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:49,155 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 [2018-09-23 19:49:49,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:49,186 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:49,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:49,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:49,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:49,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 19:49:49,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 19:49:49,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 19:49:49,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:49:49,230 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-23 19:49:52,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:52,900 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 19:49:52,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:49:52,900 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-23 19:49:52,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:52,901 INFO L225 Difference]: With dead ends: 79 [2018-09-23 19:49:52,901 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 19:49:52,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:49:52,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 19:49:52,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-23 19:49:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 19:49:52,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-23 19:49:52,906 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-23 19:49:52,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:52,906 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-23 19:49:52,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 19:49:52,906 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-23 19:49:52,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 19:49:52,906 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:52,906 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-09-23 19:49:52,907 INFO L423 AbstractCegarLoop]: === Iteration 76 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:52,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:52,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-09-23 19:49:52,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:52,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:52,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:52,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:52,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:55,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:55,669 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 [2018-09-23 19:49:55,676 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:55,716 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-23 19:49:55,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:55,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:55,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:55,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 19:49:55,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 19:49:55,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 19:49:55,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:49:55,757 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-23 19:49:59,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:59,571 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-23 19:49:59,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 19:49:59,571 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-23 19:49:59,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:59,572 INFO L225 Difference]: With dead ends: 80 [2018-09-23 19:49:59,572 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 19:49:59,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:49:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 19:49:59,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 19:49:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:49:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-23 19:49:59,578 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-23 19:49:59,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:59,578 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-23 19:49:59,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 19:49:59,578 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-23 19:49:59,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:49:59,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:59,578 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-09-23 19:49:59,579 INFO L423 AbstractCegarLoop]: === Iteration 77 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:59,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:59,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-09-23 19:49:59,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:59,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:59,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:59,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:59,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:03,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:03,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:03,555 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:03,578 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:03,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:03,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:03,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:03,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 19:50:03,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 19:50:03,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 19:50:03,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:50:03,621 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-23 19:50:07,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:07,526 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 19:50:07,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 19:50:07,527 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-09-23 19:50:07,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:07,527 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:50:07,528 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 19:50:07,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:50:07,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 19:50:07,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-23 19:50:07,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 19:50:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-23 19:50:07,532 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-23 19:50:07,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:07,532 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-23 19:50:07,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 19:50:07,533 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-23 19:50:07,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-23 19:50:07,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:07,533 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-09-23 19:50:07,534 INFO L423 AbstractCegarLoop]: === Iteration 78 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:07,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:07,534 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-09-23 19:50:07,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:07,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:07,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:07,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:07,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:10,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:10,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:10,692 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:10,733 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-23 19:50:10,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:10,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:10,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:10,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-23 19:50:10,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 19:50:10,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 19:50:10,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:50:10,843 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-23 19:50:14,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:14,902 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-23 19:50:14,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 19:50:14,902 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-23 19:50:14,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:14,903 INFO L225 Difference]: With dead ends: 82 [2018-09-23 19:50:14,903 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 19:50:14,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:50:14,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 19:50:14,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 19:50:14,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 19:50:14,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-23 19:50:14,909 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-23 19:50:14,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:14,909 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-23 19:50:14,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 19:50:14,909 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-23 19:50:14,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 19:50:14,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:14,910 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-09-23 19:50:14,910 INFO L423 AbstractCegarLoop]: === Iteration 79 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:14,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:14,911 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-09-23 19:50:14,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:14,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:14,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:14,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:18,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:18,126 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 [2018-09-23 19:50:18,133 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:18,225 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-23 19:50:18,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:18,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:18,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:18,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 19:50:18,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 19:50:18,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 19:50:18,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:50:18,271 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-09-23 19:50:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:22,339 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 19:50:22,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 19:50:22,340 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-09-23 19:50:22,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:22,340 INFO L225 Difference]: With dead ends: 83 [2018-09-23 19:50:22,341 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 19:50:22,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:50:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 19:50:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 19:50:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 19:50:22,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-23 19:50:22,344 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-23 19:50:22,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:22,344 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-23 19:50:22,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 19:50:22,345 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-23 19:50:22,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-23 19:50:22,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:22,345 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1] [2018-09-23 19:50:22,345 INFO L423 AbstractCegarLoop]: === Iteration 80 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:22,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:22,345 INFO L82 PathProgramCache]: Analyzing trace with hash -718799327, now seen corresponding path program 79 times [2018-09-23 19:50:22,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:22,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:22,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:22,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:22,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:26,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:26,114 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 [2018-09-23 19:50:26,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:26,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:26,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:26,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-23 19:50:26,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 19:50:26,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 19:50:26,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:50:26,254 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-23 19:50:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:30,535 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-23 19:50:30,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 19:50:30,535 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-23 19:50:30,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:30,536 INFO L225 Difference]: With dead ends: 84 [2018-09-23 19:50:30,536 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:50:30,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:50:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:50:30,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 19:50:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 19:50:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-23 19:50:30,545 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-23 19:50:30,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:30,545 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-23 19:50:30,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 19:50:30,545 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-23 19:50:30,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 19:50:30,546 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:30,546 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1] [2018-09-23 19:50:30,546 INFO L423 AbstractCegarLoop]: === Iteration 81 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:30,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:30,547 INFO L82 PathProgramCache]: Analyzing trace with hash -807942713, now seen corresponding path program 80 times [2018-09-23 19:50:30,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:30,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:30,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:30,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:30,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:34,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:34,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:34,234 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:34,261 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:34,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:34,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:34,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:34,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 19:50:34,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 19:50:34,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 19:50:34,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:50:34,305 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. Received shutdown request... [2018-09-23 19:50:38,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 19:50:38,518 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:50:38,524 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:50:38,524 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:50:38 BoogieIcfgContainer [2018-09-23 19:50:38,524 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:50:38,525 INFO L168 Benchmark]: Toolchain (without parser) took 242945.05 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -75.0 MB). Free memory was 1.5 GB in the beginning and 946.2 MB in the end (delta: 505.3 MB). Peak memory consumption was 430.3 MB. Max. memory is 7.1 GB. [2018-09-23 19:50:38,526 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 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. [2018-09-23 19:50:38,527 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.42 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. [2018-09-23 19:50:38,527 INFO L168 Benchmark]: Boogie Preprocessor took 21.87 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. [2018-09-23 19:50:38,527 INFO L168 Benchmark]: RCFGBuilder took 282.16 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:50:38,528 INFO L168 Benchmark]: TraceAbstraction took 242591.21 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -75.0 MB). Free memory was 1.4 GB in the beginning and 946.2 MB in the end (delta: 484.2 MB). Peak memory consumption was 409.2 MB. Max. memory is 7.1 GB. [2018-09-23 19:50:38,530 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 0.19 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 43.42 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.87 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 282.16 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 242591.21 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -75.0 MB). Free memory was 1.4 GB in the beginning and 946.2 MB in the end (delta: 484.2 MB). Peak memory consumption was 409.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 21). Cancelled while BasicCegarLoop was constructing difference of abstraction (83states) and FLOYD_HOARE automaton (currently 83 states, 83 states before enhancement), while ReachableStatesComputation was computing reachable states (82 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 242.5s OverallTime, 81 OverallIterations, 80 TraceHistogramMax, 124.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 162 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 187004 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 104.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6641 GetRequests, 3240 SyntacticMatches, 80 SemanticMatches, 3321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 108.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 80 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 111.2s InterpolantComputationTime, 6802 NumberOfCodeBlocks, 6802 NumberOfCodeBlocksAsserted, 981 NumberOfCheckSat, 6641 ConstructedInterpolants, 0 QuantifiedInterpolants, 2526167 SizeOfPredicates, 0 NumberOfNonLiveVariables, 6880 ConjunctsInSsa, 6720 ConjunctsInUnsatCore, 161 InterpolantComputations, 1 PerfectInterpolantSequences, 0/177120 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/DivisibilityInterpolantRequired01-BackwardSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-50-38-539.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired01-BackwardSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-50-38-539.csv Completed graceful shutdown