java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:46:44,461 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:46:44,464 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:46:44,476 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:46:44,476 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:46:44,478 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:46:44,479 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:46:44,481 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:46:44,482 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:46:44,483 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:46:44,484 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 12:46:44,524 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 12:46:44,539 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:46:44,539 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:46:44,540 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:46:44,540 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:46:44,541 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:46:44,541 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:46:44,541 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:46:44,541 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:46:44,541 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:46:44,542 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:46:44,542 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:46:44,542 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:46:44,542 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:46:44,542 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:46:44,543 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:46:44,543 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:46:44,543 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:46:44,543 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:46:44,543 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:46:44,544 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:46:44,544 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:46:44,544 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:46:44,544 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:46:44,545 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:46:44,545 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:46:44,545 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:46:44,545 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:46:44,545 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:46:44,546 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:46:44,546 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:46:44,546 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 12:46:44,609 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:46:44,624 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:46:44,629 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:46:44,631 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:46:44,631 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:46:44,632 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl [2018-10-04 12:46:44,633 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl' [2018-10-04 12:46:44,690 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:46:44,692 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:46:44,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:46:44,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:46:44,693 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:46:44,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:46:44,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:46:44,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:46:44,736 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:46:44,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:46:44,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:46:44,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:46:44,758 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:46:44,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:46:44,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:46:44,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:46:45,055 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:46:45,056 INFO L202 PluginConnector]: Adding new model array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:46:45 BoogieIcfgContainer [2018-10-04 12:46:45,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:46:45,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:46:45,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:46:45,061 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:46:45,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/2) ... [2018-10-04 12:46:45,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ada69b4 and model type array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:46:45, skipping insertion in model container [2018-10-04 12:46:45,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:46:45" (2/2) ... [2018-10-04 12:46:45,064 INFO L112 eAbstractionObserver]: Analyzing ICFG array1.i_3.bpl [2018-10-04 12:46:45,074 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:46:45,082 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:46:45,132 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:46:45,133 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:46:45,133 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:46:45,133 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:46:45,133 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:46:45,134 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:46:45,134 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:46:45,134 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:46:45,134 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:46:45,150 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 12:46:45,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:46:45,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:45,157 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 12:46:45,158 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:45,166 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:45,166 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 12:46:45,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:45,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:45,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:45,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:45,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:45,314 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:46:45,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:46:45,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:46:45,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:46:45,333 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:45,335 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 12:46:45,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:45,379 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 12:46:45,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:46:45,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 12:46:45,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:45,394 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:46:45,394 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 12:46:45,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 12:46:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 12:46:45,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 12:46:45,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:46:45,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 12:46:45,434 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-04 12:46:45,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:45,434 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 12:46:45,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:46:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 12:46:45,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:46:45,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:45,435 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 12:46:45,436 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:45,436 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:45,436 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-04 12:46:45,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:45,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:45,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:45,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:45,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:45,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:45,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:45,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:45,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:45,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:45,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 12:46:45,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:46:45,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:46:45,864 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:45,864 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-04 12:46:45,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:45,952 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 12:46:45,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:46:45,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 12:46:45,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:45,954 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:46:45,954 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:46:45,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 2 [2018-10-04 12:46:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:46:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:46:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:46:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 12:46:45,962 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-04 12:46:45,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:45,966 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 12:46:45,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:46:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 12:46:45,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:46:45,967 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:45,967 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-04 12:46:45,967 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:45,967 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:45,968 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-04 12:46:45,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:45,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:45,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:45,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:45,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:46,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:46,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:46,081 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:46:46,109 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:46:46,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:46,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:46,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:46,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:46:46,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:46:46,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:46:46,183 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:46,183 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-04 12:46:46,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:46,229 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 12:46:46,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:46:46,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 12:46:46,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:46,230 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:46:46,231 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:46:46,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-04 12:46:46,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:46:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:46:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:46:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 12:46:46,235 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-04 12:46:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:46,235 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 12:46:46,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:46:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 12:46:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:46:46,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:46,236 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-04 12:46:46,237 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:46,237 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:46,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-04 12:46:46,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:46,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:46,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:46,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:46,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:46,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:46,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:46,356 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:46:46,407 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 12:46:46,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:46,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:46,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:46,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:46:46,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:46:46,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:46:46,574 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:46,574 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-04 12:46:46,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:46,652 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 12:46:46,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:46:46,654 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 12:46:46,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:46,655 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:46:46,655 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:46:46,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-04 12:46:46,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:46:46,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:46:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:46:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 12:46:46,662 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-04 12:46:46,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:46,663 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 12:46:46,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:46:46,663 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 12:46:46,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:46:46,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:46,664 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-04 12:46:46,664 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:46,665 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:46,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-04 12:46:46,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:46,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:46,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:46,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:46,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:46,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:46,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:46,823 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:46:46,864 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:46:46,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:46,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:47,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:47,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:46:47,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:46:47,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:46:47,004 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:47,005 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-04 12:46:47,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:47,053 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 12:46:47,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:46:47,054 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 12:46:47,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:47,054 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:46:47,055 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:46:47,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 5 [2018-10-04 12:46:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:46:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:46:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:46:47,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 12:46:47,059 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-04 12:46:47,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:47,060 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 12:46:47,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:46:47,060 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 12:46:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:46:47,061 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:47,061 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-04 12:46:47,061 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:47,062 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:47,062 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-04 12:46:47,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:47,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:47,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:47,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:47,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:47,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:47,269 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:47,279 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:46:47,312 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 12:46:47,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:47,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:47,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:47,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:46:47,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:46:47,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:46:47,395 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:47,395 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-04 12:46:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:47,445 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 12:46:47,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:46:47,447 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 12:46:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:47,447 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:46:47,448 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:46:47,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 6 [2018-10-04 12:46:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:46:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:46:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:46:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 12:46:47,453 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-04 12:46:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:47,454 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 12:46:47,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:46:47,454 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 12:46:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:46:47,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:47,455 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-04 12:46:47,455 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:47,455 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:47,456 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-04 12:46:47,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:47,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:47,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:47,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:47,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:47,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:47,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:47,603 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:46:47,618 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:46:47,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:47,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:48,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:48,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:46:48,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:46:48,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:46:48,118 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:48,119 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-04 12:46:48,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:48,179 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 12:46:48,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:46:48,181 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 12:46:48,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:48,182 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:46:48,182 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:46:48,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.0s impTime 7 [2018-10-04 12:46:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:46:48,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:46:48,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:46:48,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 12:46:48,186 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-04 12:46:48,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:48,187 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 12:46:48,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:46:48,187 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 12:46:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:46:48,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:48,188 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-04 12:46:48,188 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:48,188 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:48,189 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-04 12:46:48,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:48,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:48,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:48,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:48,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:48,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:48,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:48,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:48,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:48,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:48,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:46:48,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:46:48,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:46:48,585 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:48,586 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-04 12:46:48,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:48,689 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 12:46:48,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:46:48,690 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 12:46:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:48,691 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:46:48,692 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:46:48,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 8 [2018-10-04 12:46:48,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:46:48,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:46:48,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:46:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 12:46:48,696 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-04 12:46:48,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:48,697 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 12:46:48,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:46:48,697 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 12:46:48,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:46:48,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:48,698 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-04 12:46:48,698 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:48,699 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:48,699 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-04 12:46:48,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:48,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:48,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:48,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:48,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:48,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:48,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:48,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:46:48,898 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:46:48,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:48,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:48,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:48,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:46:48,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:46:48,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:46:48,997 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:48,998 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-04 12:46:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:49,052 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 12:46:49,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:46:49,054 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 12:46:49,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:49,055 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:46:49,055 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:46:49,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 9 [2018-10-04 12:46:49,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:46:49,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:46:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:46:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 12:46:49,060 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-04 12:46:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:49,060 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 12:46:49,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:46:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 12:46:49,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:46:49,061 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:49,061 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-04 12:46:49,062 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:49,062 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:49,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-04 12:46:49,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:49,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:49,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:49,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:49,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:49,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:49,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:49,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:46:49,262 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 12:46:49,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:49,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:49,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:49,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:46:49,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:46:49,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:46:49,367 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:49,367 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-04 12:46:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:49,412 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 12:46:49,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:46:49,413 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 12:46:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:49,413 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:46:49,413 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:46:49,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 10 [2018-10-04 12:46:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:46:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:46:49,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:46:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 12:46:49,417 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-04 12:46:49,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:49,418 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 12:46:49,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:46:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 12:46:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:46:49,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:49,419 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-04 12:46:49,419 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:49,419 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:49,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-04 12:46:49,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:49,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:49,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:49,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:49,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:49,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:49,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:49,658 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:46:49,677 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:46:49,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:49,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:49,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:49,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:46:49,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:46:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:46:49,783 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:49,783 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-04 12:46:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:49,816 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 12:46:49,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:46:49,817 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 12:46:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:49,818 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:46:49,818 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:46:49,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 11 [2018-10-04 12:46:49,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:46:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 12:46:49,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:46:49,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 12:46:49,823 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-04 12:46:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:49,823 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 12:46:49,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:46:49,823 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 12:46:49,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:46:49,824 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:49,824 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-04 12:46:49,825 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:49,825 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:49,825 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-04 12:46:49,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:49,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:49,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:49,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:49,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:49,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:49,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:50,005 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:46:50,034 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 12:46:50,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:50,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:50,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:50,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:46:50,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:46:50,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:46:50,141 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:50,142 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-04 12:46:50,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:50,240 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 12:46:50,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:46:50,240 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 12:46:50,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:50,241 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:46:50,241 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:46:50,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 12 [2018-10-04 12:46:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:46:50,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:46:50,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:46:50,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 12:46:50,246 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-04 12:46:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:50,247 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 12:46:50,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:46:50,247 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 12:46:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:46:50,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:50,248 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-04 12:46:50,248 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:50,249 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:50,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-04 12:46:50,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:50,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:50,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:50,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:50,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:50,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:50,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:50,478 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:46:50,516 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:46:50,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:50,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:50,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:50,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:46:50,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:46:50,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:46:50,749 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:50,749 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-04 12:46:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:50,791 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 12:46:50,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:46:50,794 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 12:46:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:50,795 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:46:50,795 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:46:50,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 13 [2018-10-04 12:46:50,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:46:50,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:46:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:46:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 12:46:50,801 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-04 12:46:50,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:50,801 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 12:46:50,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:46:50,802 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 12:46:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:46:50,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:50,803 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-04 12:46:50,803 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:50,803 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:50,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-04 12:46:50,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:50,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:50,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:50,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:50,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:51,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:51,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:51,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:51,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:51,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:51,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:46:51,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:46:51,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:46:51,242 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:51,242 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-04 12:46:51,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:51,343 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 12:46:51,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:46:51,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 12:46:51,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:51,344 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:46:51,344 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:46:51,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 14 [2018-10-04 12:46:51,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:46:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 12:46:51,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:46:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 12:46:51,349 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-04 12:46:51,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:51,350 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 12:46:51,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:46:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 12:46:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:46:51,351 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:51,351 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-04 12:46:51,351 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:51,352 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:51,352 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-04 12:46:51,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:51,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:51,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:51,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:51,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:51,572 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:51,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:51,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:51,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:46:51,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:46:51,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:51,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:51,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:51,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:46:51,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:46:51,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:46:51,732 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:51,732 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-04 12:46:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:51,791 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 12:46:51,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:46:51,792 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 12:46:51,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:51,792 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:46:51,792 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:46:51,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 15 [2018-10-04 12:46:51,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:46:51,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 12:46:51,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:46:51,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 12:46:51,800 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-04 12:46:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:51,800 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 12:46:51,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:46:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 12:46:51,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:46:51,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:51,801 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-04 12:46:51,801 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:51,802 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:51,802 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-04 12:46:51,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:51,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:51,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:51,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:51,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:52,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:52,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:52,108 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:46:52,313 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 12:46:52,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:52,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:52,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:52,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:46:52,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:46:52,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:46:52,725 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:52,726 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-04 12:46:52,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:52,767 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 12:46:52,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:46:52,769 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 12:46:52,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:52,770 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:46:52,770 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:46:52,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.1s impTime 16 [2018-10-04 12:46:52,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:46:52,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:46:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:46:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 12:46:52,774 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-04 12:46:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:52,775 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 12:46:52,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:46:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 12:46:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:46:52,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:52,776 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-04 12:46:52,776 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:52,776 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:52,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-04 12:46:52,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:52,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:52,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:52,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:52,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:53,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:53,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:53,071 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:46:53,102 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:46:53,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:53,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:53,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:53,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:46:53,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:46:53,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:46:53,375 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:53,375 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-04 12:46:53,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:53,427 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 12:46:53,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:46:53,431 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 12:46:53,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:53,431 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:46:53,432 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:46:53,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 17 [2018-10-04 12:46:53,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:46:53,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 12:46:53,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:46:53,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 12:46:53,436 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-04 12:46:53,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:53,437 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 12:46:53,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:46:53,437 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 12:46:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:46:53,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:53,438 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-04 12:46:53,438 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:53,438 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:53,439 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-04 12:46:53,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:53,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:53,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:53,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:53,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:54,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:54,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:54,207 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:46:54,255 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 12:46:54,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:54,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:54,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:54,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:46:54,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:46:54,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:46:54,537 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:54,537 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-04 12:46:54,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:54,573 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 12:46:54,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:46:54,574 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 12:46:54,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:54,574 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:46:54,575 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:46:54,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.4s impTime 18 [2018-10-04 12:46:54,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:46:54,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:46:54,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:46:54,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 12:46:54,580 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-04 12:46:54,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:54,581 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 12:46:54,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:46:54,581 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 12:46:54,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:46:54,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:54,582 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-04 12:46:54,582 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:54,582 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:54,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-04 12:46:54,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:54,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:54,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:54,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:54,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:54,871 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:54,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:54,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:54,884 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:46:54,922 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:46:54,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:54,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:55,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:55,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 12:46:55,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:46:55,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:46:55,044 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:55,044 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-10-04 12:46:55,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:55,517 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 12:46:55,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:46:55,517 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-04 12:46:55,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:55,518 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:46:55,518 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:46:55,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 6 [2018-10-04 12:46:55,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:46:55,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 12:46:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:46:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 12:46:55,524 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-10-04 12:46:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:55,524 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 12:46:55,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:46:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 12:46:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:46:55,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:55,527 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-04 12:46:55,528 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:55,528 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:55,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-10-04 12:46:55,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:55,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:55,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:55,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:55,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:55,798 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:55,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:55,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:55,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:55,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:55,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:55,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:46:55,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:46:55,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:46:55,952 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:55,953 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-10-04 12:46:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:56,011 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 12:46:56,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:46:56,011 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-04 12:46:56,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:56,012 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:46:56,012 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 12:46:56,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 7 [2018-10-04 12:46:56,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 12:46:56,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 12:46:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:46:56,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 12:46:56,017 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-10-04 12:46:56,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:56,018 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 12:46:56,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:46:56,018 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 12:46:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:46:56,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:56,019 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-10-04 12:46:56,019 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:56,019 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:56,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-10-04 12:46:56,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:56,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:56,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:56,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:56,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:56,496 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:56,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:56,525 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:56,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:46:56,554 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:46:56,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:56,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:56,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:56,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:46:56,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:46:56,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:46:56,689 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:56,689 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-10-04 12:46:56,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:56,759 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 12:46:56,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:46:56,760 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-04 12:46:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:56,761 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:46:56,761 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:46:56,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 8 [2018-10-04 12:46:56,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:46:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:46:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:46:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 12:46:56,766 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-10-04 12:46:56,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:56,766 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 12:46:56,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:46:56,766 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 12:46:56,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:46:56,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:56,767 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-04 12:46:56,767 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:56,768 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:56,768 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-10-04 12:46:56,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:56,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:56,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:56,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:56,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:57,066 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:57,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:57,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:57,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:46:57,247 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 12:46:57,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:57,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:57,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:57,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:46:57,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:46:57,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:46:57,381 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:57,381 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-10-04 12:46:57,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:57,498 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 12:46:57,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:46:57,501 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-04 12:46:57,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:57,502 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:46:57,502 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 12:46:57,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 9 [2018-10-04 12:46:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 12:46:57,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 12:46:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 12:46:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 12:46:57,507 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-10-04 12:46:57,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:57,507 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 12:46:57,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:46:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 12:46:57,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:46:57,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:57,508 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-10-04 12:46:57,508 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:57,509 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:57,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-10-04 12:46:57,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:57,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:57,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:57,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:57,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:57,860 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:57,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:57,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:57,909 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:46:57,930 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:46:57,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:57,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:58,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:58,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 12:46:58,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:46:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:46:58,065 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:58,065 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-10-04 12:46:58,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:58,215 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 12:46:58,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:46:58,215 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-04 12:46:58,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:58,216 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:46:58,216 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:46:58,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 10 [2018-10-04 12:46:58,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:46:58,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 12:46:58,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:46:58,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 12:46:58,221 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-10-04 12:46:58,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:58,221 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 12:46:58,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:46:58,221 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 12:46:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:46:58,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:58,222 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-04 12:46:58,223 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:58,223 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:58,223 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-10-04 12:46:58,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:58,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:58,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:58,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:58,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:59,352 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:59,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:59,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:59,490 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:46:59,577 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 12:46:59,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:59,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:59,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:59,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:46:59,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:46:59,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:46:59,734 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:59,735 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-10-04 12:46:59,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:59,809 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 12:46:59,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:46:59,809 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-04 12:46:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:59,810 INFO L225 Difference]: With dead ends: 55 [2018-10-04 12:46:59,810 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:46:59,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 11 [2018-10-04 12:46:59,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:46:59,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 12:46:59,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 12:46:59,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 12:46:59,815 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-10-04 12:46:59,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:59,816 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 12:46:59,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:46:59,816 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 12:46:59,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:46:59,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:59,817 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-10-04 12:46:59,817 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:59,817 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:59,817 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-10-04 12:46:59,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:59,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:59,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:59,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:59,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:00,204 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:00,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:00,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:00,267 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:00,327 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 12:47:00,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:00,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:00,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:00,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 12:47:00,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:47:00,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:47:00,458 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:00,458 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-10-04 12:47:00,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:00,510 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 12:47:00,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:47:00,511 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-04 12:47:00,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:00,511 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:47:00,511 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:47:00,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 12 [2018-10-04 12:47:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:47:00,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 12:47:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:47:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 12:47:00,516 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-10-04 12:47:00,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:00,516 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 12:47:00,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:47:00,516 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 12:47:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:47:00,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:00,517 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-10-04 12:47:00,517 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:00,517 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:00,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-10-04 12:47:00,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:00,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:00,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:00,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:00,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:00,828 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:00,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:00,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:00,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:00,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:01,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:01,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:47:01,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:47:01,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:47:01,093 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:01,093 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-10-04 12:47:01,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:01,141 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 12:47:01,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:47:01,141 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-04 12:47:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:01,142 INFO L225 Difference]: With dead ends: 59 [2018-10-04 12:47:01,143 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 12:47:01,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 13 [2018-10-04 12:47:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 12:47:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 12:47:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 12:47:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 12:47:01,147 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-10-04 12:47:01,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:01,147 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 12:47:01,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:47:01,147 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 12:47:01,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:47:01,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:01,148 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-10-04 12:47:01,148 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:01,148 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:01,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-10-04 12:47:01,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:01,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:01,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:01,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:01,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:01,642 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:01,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:01,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:01,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:01,811 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:01,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:01,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:01,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:01,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:47:01,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:47:01,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:47:01,978 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:01,978 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-10-04 12:47:02,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:02,024 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 12:47:02,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:47:02,024 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-04 12:47:02,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:02,025 INFO L225 Difference]: With dead ends: 61 [2018-10-04 12:47:02,025 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:47:02,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 14 [2018-10-04 12:47:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:47:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 12:47:02,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:47:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 12:47:02,030 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-10-04 12:47:02,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:02,030 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 12:47:02,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:47:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 12:47:02,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:47:02,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:02,031 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-10-04 12:47:02,031 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:02,031 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:02,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-10-04 12:47:02,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:02,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:02,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:02,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:02,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:02,268 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:02,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:02,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:02,430 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:02,507 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 12:47:02,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:02,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:02,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:02,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:47:02,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:47:02,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:47:02,664 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:02,665 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-10-04 12:47:02,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:02,729 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 12:47:02,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:47:02,729 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-04 12:47:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:02,730 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:47:02,730 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:47:02,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 15 [2018-10-04 12:47:02,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:47:02,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 12:47:02,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 12:47:02,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 12:47:02,734 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-10-04 12:47:02,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:02,734 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 12:47:02,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:47:02,734 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 12:47:02,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 12:47:02,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:02,735 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-10-04 12:47:02,735 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:02,736 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:02,736 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-10-04 12:47:02,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:02,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:02,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:02,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:02,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:03,133 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:03,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:03,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:03,369 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:47:03,393 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:47:03,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:03,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:03,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:03,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:47:03,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:47:03,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:47:03,522 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:03,522 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-10-04 12:47:03,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:03,631 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 12:47:03,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:47:03,631 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-04 12:47:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:03,632 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:47:03,632 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:47:03,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 16 [2018-10-04 12:47:03,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:47:03,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 12:47:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:47:03,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 12:47:03,635 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-10-04 12:47:03,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:03,636 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 12:47:03,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:47:03,636 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 12:47:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:47:03,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:03,637 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-10-04 12:47:03,637 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:03,637 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:03,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-10-04 12:47:03,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:03,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:03,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:03,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:03,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:03,920 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:04,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:04,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:04,026 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:47:04,194 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 12:47:04,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:04,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:04,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:04,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:47:04,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:47:04,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:47:04,359 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:04,359 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-10-04 12:47:04,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:04,409 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 12:47:04,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:47:04,409 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-04 12:47:04,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:04,410 INFO L225 Difference]: With dead ends: 67 [2018-10-04 12:47:04,410 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:47:04,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 17 [2018-10-04 12:47:04,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:47:04,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 12:47:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 12:47:04,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 12:47:04,415 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-10-04 12:47:04,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:04,415 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 12:47:04,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:47:04,415 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 12:47:04,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 12:47:04,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:04,416 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-10-04 12:47:04,416 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:04,416 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:04,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-10-04 12:47:04,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:04,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:04,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:04,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:04,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:04,850 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:05,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:05,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:05,186 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:05,272 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 12:47:05,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:05,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:05,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:05,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 12:47:05,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:47:05,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:47:05,424 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:05,424 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-10-04 12:47:05,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:05,485 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 12:47:05,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:47:05,486 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-04 12:47:05,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:05,487 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:47:05,487 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:47:05,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 18 [2018-10-04 12:47:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:47:05,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 12:47:05,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:47:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 12:47:05,490 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-10-04 12:47:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:05,490 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 12:47:05,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:47:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 12:47:05,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:47:05,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:05,491 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-10-04 12:47:05,491 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:05,491 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:05,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-10-04 12:47:05,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:05,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:05,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:05,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:05,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:05,966 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:06,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:06,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:06,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:06,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:06,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:06,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:47:06,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:47:06,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:47:06,294 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:06,294 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-10-04 12:47:06,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:06,374 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 12:47:06,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:47:06,375 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-04 12:47:06,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:06,376 INFO L225 Difference]: With dead ends: 71 [2018-10-04 12:47:06,376 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:47:06,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 19 [2018-10-04 12:47:06,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:47:06,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 12:47:06,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 12:47:06,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 12:47:06,379 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-10-04 12:47:06,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:06,379 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 12:47:06,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:47:06,379 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 12:47:06,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:47:06,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:06,380 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-10-04 12:47:06,380 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:06,380 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:06,380 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-10-04 12:47:06,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:06,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:06,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:06,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:06,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:06,733 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:07,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:07,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:07,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:07,117 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:07,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:07,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:07,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:07,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:47:07,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:47:07,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:47:07,243 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:07,243 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-10-04 12:47:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:07,311 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 12:47:07,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:47:07,311 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-04 12:47:07,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:07,312 INFO L225 Difference]: With dead ends: 73 [2018-10-04 12:47:07,312 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:47:07,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 20 [2018-10-04 12:47:07,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:47:07,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 12:47:07,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 12:47:07,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-04 12:47:07,316 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-10-04 12:47:07,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:07,317 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-04 12:47:07,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:47:07,317 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-04 12:47:07,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 12:47:07,317 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:07,317 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-10-04 12:47:07,318 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:07,318 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:07,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-10-04 12:47:07,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:07,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:07,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:07,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:07,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:07,731 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:07,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:07,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:07,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:08,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 12:47:08,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:08,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:08,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:08,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 12:47:08,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:47:08,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:47:08,171 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:08,171 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-10-04 12:47:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:08,223 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 12:47:08,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:47:08,224 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-04 12:47:08,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:08,225 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:47:08,225 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 12:47:08,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 21 [2018-10-04 12:47:08,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 12:47:08,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 12:47:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 12:47:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-04 12:47:08,229 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-10-04 12:47:08,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:08,229 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-04 12:47:08,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:47:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-04 12:47:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 12:47:08,230 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:08,230 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-10-04 12:47:08,230 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:08,230 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:08,230 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-10-04 12:47:08,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:08,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:08,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:08,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:08,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:08,473 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:08,670 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:08,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:08,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:08,684 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:47:08,713 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:47:08,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:08,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:08,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:08,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 12:47:08,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:47:08,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:47:08,852 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:08,852 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-10-04 12:47:08,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:08,993 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 12:47:08,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:47:08,993 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-04 12:47:08,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:08,994 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:47:08,994 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 12:47:08,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 7 [2018-10-04 12:47:08,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 12:47:08,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 12:47:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 12:47:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-04 12:47:08,998 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-10-04 12:47:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:08,999 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-04 12:47:08,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:47:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-04 12:47:08,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:47:08,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:08,999 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-10-04 12:47:09,000 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:09,000 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:09,000 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-10-04 12:47:09,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:09,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:09,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:09,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:09,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:09,510 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:09,838 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:09,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:09,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:09,880 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:47:10,198 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 12:47:10,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:10,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:10,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:10,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:47:10,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:47:10,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:47:10,374 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:10,374 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-10-04 12:47:10,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:10,502 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 12:47:10,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:47:10,511 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-04 12:47:10,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:10,512 INFO L225 Difference]: With dead ends: 79 [2018-10-04 12:47:10,512 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 12:47:10,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 8 [2018-10-04 12:47:10,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 12:47:10,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 12:47:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 12:47:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-04 12:47:10,515 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-10-04 12:47:10,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:10,515 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-04 12:47:10,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:47:10,516 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-04 12:47:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 12:47:10,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:10,516 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-10-04 12:47:10,516 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:10,516 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:10,517 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-10-04 12:47:10,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:10,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:10,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:10,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:10,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:11,648 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:12,114 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:12,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:12,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:12,355 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:12,489 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 12:47:12,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:12,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:13,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:13,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 12:47:13,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:47:13,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:47:13,191 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:13,192 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-10-04 12:47:13,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:13,263 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 12:47:13,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:47:13,264 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-04 12:47:13,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:13,265 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:47:13,265 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 12:47:13,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 1.3s impTime 9 [2018-10-04 12:47:13,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 12:47:13,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 12:47:13,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 12:47:13,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-04 12:47:13,268 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-10-04 12:47:13,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:13,269 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-04 12:47:13,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:47:13,269 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-04 12:47:13,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:47:13,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:13,269 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-10-04 12:47:13,270 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:13,270 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:13,270 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-10-04 12:47:13,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:13,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:13,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:13,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:13,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:13,571 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:13,968 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:14,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:14,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:14,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:14,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:14,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:14,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:47:14,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:47:14,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:47:14,291 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:14,291 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-10-04 12:47:14,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:14,377 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 12:47:14,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:47:14,377 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-04 12:47:14,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:14,378 INFO L225 Difference]: With dead ends: 83 [2018-10-04 12:47:14,378 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 12:47:14,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 10 [2018-10-04 12:47:14,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 12:47:14,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 12:47:14,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 12:47:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-04 12:47:14,381 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-10-04 12:47:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:14,381 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-04 12:47:14,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:47:14,382 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-04 12:47:14,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 12:47:14,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:14,382 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-10-04 12:47:14,383 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:14,383 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:14,383 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-10-04 12:47:14,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:14,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:14,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:14,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:14,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:14,660 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:15,223 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:15,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:15,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:15,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:15,411 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:15,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:15,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:15,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:15,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 12:47:15,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:47:15,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:47:15,597 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:15,597 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-10-04 12:47:15,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:15,725 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 12:47:15,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:47:15,726 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-04 12:47:15,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:15,727 INFO L225 Difference]: With dead ends: 85 [2018-10-04 12:47:15,727 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:47:15,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 11 [2018-10-04 12:47:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:47:15,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 12:47:15,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 12:47:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-04 12:47:15,731 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-10-04 12:47:15,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:15,731 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-04 12:47:15,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:47:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-04 12:47:15,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 12:47:15,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:15,732 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-10-04 12:47:15,732 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:15,732 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:15,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-10-04 12:47:15,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:15,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:15,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:15,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:15,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:16,020 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:16,226 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:16,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:16,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:16,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:16,482 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-04 12:47:16,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:16,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:16,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:16,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 12:47:16,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:47:16,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:47:16,777 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:16,777 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-10-04 12:47:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:16,902 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 12:47:16,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:47:16,902 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-04 12:47:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:16,903 INFO L225 Difference]: With dead ends: 87 [2018-10-04 12:47:16,903 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 12:47:16,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 12 [2018-10-04 12:47:16,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 12:47:16,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 12:47:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 12:47:16,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-04 12:47:16,907 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-10-04 12:47:16,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:16,907 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-04 12:47:16,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:47:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-04 12:47:16,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 12:47:16,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:16,908 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-10-04 12:47:16,908 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:16,908 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:16,908 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-10-04 12:47:16,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:16,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:16,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:16,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:16,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:17,190 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:17,581 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:18,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:18,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:18,477 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:47:18,533 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:47:18,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:18,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:19,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:19,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 12:47:19,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:47:19,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:47:19,068 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:19,068 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-10-04 12:47:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:19,219 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 12:47:19,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:47:19,219 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-04 12:47:19,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:19,220 INFO L225 Difference]: With dead ends: 89 [2018-10-04 12:47:19,220 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 12:47:19,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.3s impTime 13 [2018-10-04 12:47:19,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 12:47:19,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 12:47:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 12:47:19,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-04 12:47:19,224 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-10-04 12:47:19,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:19,224 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-04 12:47:19,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:47:19,224 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-04 12:47:19,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 12:47:19,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:19,225 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-10-04 12:47:19,225 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:19,225 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:19,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-10-04 12:47:19,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:19,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:19,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:19,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:19,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:19,540 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:19,925 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:20,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:20,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:20,189 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:47:20,686 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-04 12:47:20,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:20,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:20,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:20,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:47:20,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:47:20,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:47:20,924 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:20,924 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-10-04 12:47:21,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:21,006 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 12:47:21,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:47:21,006 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-04 12:47:21,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:21,007 INFO L225 Difference]: With dead ends: 91 [2018-10-04 12:47:21,007 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 12:47:21,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 14 [2018-10-04 12:47:21,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 12:47:21,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 12:47:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 12:47:21,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-04 12:47:21,010 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-10-04 12:47:21,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:21,010 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-04 12:47:21,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:47:21,010 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-04 12:47:21,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 12:47:21,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:21,010 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-10-04 12:47:21,011 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:21,011 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:21,011 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-10-04 12:47:21,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:21,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:21,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:21,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:21,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:21,266 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:21,765 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:22,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:22,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:22,124 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:22,308 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 12:47:22,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:22,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:22,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:22,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 12:47:22,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:47:22,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:47:22,522 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:22,522 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-10-04 12:47:22,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:22,578 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 12:47:22,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:47:22,579 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-04 12:47:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:22,580 INFO L225 Difference]: With dead ends: 93 [2018-10-04 12:47:22,580 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 12:47:22,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 15 [2018-10-04 12:47:22,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 12:47:22,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 12:47:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 12:47:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-04 12:47:22,584 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-10-04 12:47:22,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:22,584 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-04 12:47:22,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:47:22,584 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-04 12:47:22,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 12:47:22,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:22,585 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-10-04 12:47:22,585 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:22,585 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:22,585 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-10-04 12:47:22,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:22,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:22,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:22,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:22,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:22,810 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:23,540 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:23,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:23,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:23,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:23,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:24,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:24,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:47:24,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:47:24,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:47:24,054 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:24,054 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-10-04 12:47:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:24,153 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 12:47:24,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:47:24,154 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-04 12:47:24,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:24,155 INFO L225 Difference]: With dead ends: 95 [2018-10-04 12:47:24,155 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 12:47:24,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.6s impTime 16 [2018-10-04 12:47:24,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 12:47:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 12:47:24,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 12:47:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-04 12:47:24,158 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-10-04 12:47:24,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:24,158 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-04 12:47:24,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:47:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-04 12:47:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 12:47:24,159 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:24,159 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-10-04 12:47:24,159 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:24,160 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:24,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-10-04 12:47:24,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:24,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:24,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:24,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:24,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:24,459 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:24,656 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:24,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:24,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:24,847 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:24,882 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:24,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:24,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:25,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:25,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 12:47:25,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:47:25,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:47:25,213 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:25,213 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-10-04 12:47:25,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:25,510 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 12:47:25,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:47:25,511 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-04 12:47:25,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:25,512 INFO L225 Difference]: With dead ends: 97 [2018-10-04 12:47:25,512 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 12:47:25,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.4s impTime 17 [2018-10-04 12:47:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 12:47:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 12:47:25,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 12:47:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-04 12:47:25,518 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-10-04 12:47:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:25,518 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-04 12:47:25,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:47:25,518 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-04 12:47:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 12:47:25,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:25,519 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-10-04 12:47:25,519 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:25,519 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:25,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-10-04 12:47:25,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:25,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:25,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:25,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:25,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:25,893 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:26,102 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:26,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:26,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:26,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:26,595 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-04 12:47:26,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:26,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:26,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:26,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:47:26,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:47:26,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:47:26,874 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:26,875 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-10-04 12:47:27,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:27,001 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 12:47:27,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:47:27,001 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-04 12:47:27,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:27,002 INFO L225 Difference]: With dead ends: 99 [2018-10-04 12:47:27,002 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 12:47:27,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.5s impTime 18 [2018-10-04 12:47:27,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 12:47:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 12:47:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 12:47:27,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-04 12:47:27,004 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-10-04 12:47:27,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:27,005 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-04 12:47:27,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:47:27,005 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-04 12:47:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 12:47:27,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:27,005 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-10-04 12:47:27,005 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:27,005 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:27,006 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-10-04 12:47:27,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:27,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:27,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:27,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:27,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:27,597 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:28,030 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:28,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:28,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:28,503 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:47:28,542 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:47:28,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:28,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:28,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:28,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 12:47:28,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:47:28,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:47:28,744 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:28,744 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-10-04 12:47:28,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:28,842 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 12:47:28,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:47:28,842 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-04 12:47:28,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:28,843 INFO L225 Difference]: With dead ends: 101 [2018-10-04 12:47:28,843 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 12:47:28,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 19 [2018-10-04 12:47:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 12:47:28,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 12:47:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 12:47:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-04 12:47:28,846 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-10-04 12:47:28,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:28,846 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-04 12:47:28,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:47:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-04 12:47:28,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 12:47:28,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:28,848 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-10-04 12:47:28,848 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:28,848 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:28,848 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-10-04 12:47:28,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:28,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:28,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:28,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:28,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:29,138 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:29,343 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:29,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:29,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:29,589 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:47:30,412 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-04 12:47:30,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:30,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:30,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:30,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:47:30,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:47:30,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:47:30,602 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:30,602 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-10-04 12:47:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:30,679 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 12:47:30,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:47:30,680 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-04 12:47:30,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:30,681 INFO L225 Difference]: With dead ends: 103 [2018-10-04 12:47:30,681 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 12:47:30,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 20 [2018-10-04 12:47:30,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 12:47:30,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 12:47:30,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 12:47:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-04 12:47:30,684 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-10-04 12:47:30,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:30,685 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-04 12:47:30,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:47:30,685 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-04 12:47:30,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 12:47:30,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:30,686 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-10-04 12:47:30,686 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:30,686 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:30,686 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-10-04 12:47:30,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:30,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:30,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:30,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:30,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:30,997 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:31,323 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:31,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:31,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:31,510 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:31,775 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 12:47:31,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:31,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:32,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:32,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 12:47:32,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:47:32,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:47:32,092 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:32,092 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-10-04 12:47:32,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:32,224 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 12:47:32,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:47:32,224 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-04 12:47:32,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:32,225 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:47:32,225 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 12:47:32,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 21 [2018-10-04 12:47:32,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 12:47:32,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 12:47:32,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 12:47:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-04 12:47:32,230 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-10-04 12:47:32,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:32,230 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-04 12:47:32,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:47:32,230 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-04 12:47:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 12:47:32,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:32,231 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-10-04 12:47:32,231 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:32,231 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:32,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-10-04 12:47:32,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:32,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:32,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:32,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:32,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:32,524 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:32,702 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:33,082 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:33,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:33,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:33,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:33,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:33,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:33,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:47:33,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:47:33,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:47:33,321 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:33,321 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-10-04 12:47:33,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:33,437 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-04 12:47:33,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:47:33,437 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-04 12:47:33,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:33,438 INFO L225 Difference]: With dead ends: 107 [2018-10-04 12:47:33,438 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 12:47:33,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 7 [2018-10-04 12:47:33,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 12:47:33,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 12:47:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 12:47:33,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-04 12:47:33,441 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-10-04 12:47:33,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:33,442 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-04 12:47:33,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:47:33,442 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-04 12:47:33,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 12:47:33,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:33,443 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-10-04 12:47:33,443 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:33,443 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:33,443 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-10-04 12:47:33,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:33,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:33,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:33,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:33,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:33,842 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:34,266 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:34,890 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:34,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:34,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:34,956 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:35,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:35,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:35,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:35,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:35,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 12:47:35,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:47:35,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:47:35,309 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:35,309 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-10-04 12:47:35,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:35,521 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 12:47:35,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:47:35,522 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-04 12:47:35,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:35,523 INFO L225 Difference]: With dead ends: 109 [2018-10-04 12:47:35,523 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 12:47:35,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime 8 [2018-10-04 12:47:35,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 12:47:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 12:47:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 12:47:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-04 12:47:35,527 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-10-04 12:47:35,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:35,527 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-04 12:47:35,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:47:35,527 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-04 12:47:35,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 12:47:35,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:35,528 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-10-04 12:47:35,528 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:35,528 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:35,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-10-04 12:47:35,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:35,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:35,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:35,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:35,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:36,246 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:36,579 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:37,279 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:37,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:37,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:37,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:37,850 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-04 12:47:37,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:37,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:38,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:38,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 12:47:38,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:47:38,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:47:38,266 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:38,266 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-10-04 12:47:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:38,376 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-04 12:47:38,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:47:38,376 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-04 12:47:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:38,377 INFO L225 Difference]: With dead ends: 111 [2018-10-04 12:47:38,377 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 12:47:38,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.5s impTime 9 [2018-10-04 12:47:38,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 12:47:38,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 12:47:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 12:47:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-04 12:47:38,380 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-10-04 12:47:38,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:38,380 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-04 12:47:38,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:47:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-04 12:47:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 12:47:38,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:38,381 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-10-04 12:47:38,381 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:38,381 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:38,381 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-10-04 12:47:38,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:38,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:38,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:38,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:38,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:38,847 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:39,187 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:39,737 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:39,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:39,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:39,906 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:47:39,969 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:47:39,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:39,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:40,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:40,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 12:47:40,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:47:40,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:47:40,209 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:40,209 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-10-04 12:47:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:40,311 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-04 12:47:40,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:47:40,312 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-04 12:47:40,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:40,313 INFO L225 Difference]: With dead ends: 113 [2018-10-04 12:47:40,313 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 12:47:40,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.1s impTime 10 [2018-10-04 12:47:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 12:47:40,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 12:47:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 12:47:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-04 12:47:40,315 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-10-04 12:47:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:40,316 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-04 12:47:40,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:47:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-04 12:47:40,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 12:47:40,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:40,316 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-10-04 12:47:40,317 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:40,317 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:40,317 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-10-04 12:47:40,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:40,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:40,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:40,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:40,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:41,525 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:41,909 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:42,713 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:42,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:42,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:42,845 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:47:44,181 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-04 12:47:44,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:44,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:44,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:44,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 12:47:44,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:47:44,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:47:44,429 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:44,429 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-10-04 12:47:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:44,517 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-04 12:47:44,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:47:44,518 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-04 12:47:44,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:44,518 INFO L225 Difference]: With dead ends: 115 [2018-10-04 12:47:44,518 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 12:47:44,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.0s impTime 11 [2018-10-04 12:47:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 12:47:44,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 12:47:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 12:47:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-04 12:47:44,521 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-10-04 12:47:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:44,522 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-04 12:47:44,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:47:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-04 12:47:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 12:47:44,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:44,523 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-10-04 12:47:44,523 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:44,523 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:44,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-10-04 12:47:44,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:44,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:44,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:44,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:44,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:45,820 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:46,052 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:46,522 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:46,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:46,775 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:46,782 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:47,154 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 12:47:47,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:47,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:47,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:47,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 12:47:47,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 12:47:47,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 12:47:47,639 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:47,639 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-10-04 12:47:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:47,853 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-04 12:47:47,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:47:47,853 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-04 12:47:47,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:47,854 INFO L225 Difference]: With dead ends: 117 [2018-10-04 12:47:47,854 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 12:47:47,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 1.8s impTime 12 [2018-10-04 12:47:47,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 12:47:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 12:47:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 12:47:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-04 12:47:47,858 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-10-04 12:47:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:47,859 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-04 12:47:47,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 12:47:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-04 12:47:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 12:47:47,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:47,860 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-10-04 12:47:47,860 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:47,860 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:47,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-10-04 12:47:47,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:47,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:47,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:47,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:47,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:48,749 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:48,956 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:49,339 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:49,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:49,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:49,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:49,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:49,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:49,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 12:47:49,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:47:49,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:47:49,920 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:49,920 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-10-04 12:47:50,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:50,407 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-04 12:47:50,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:47:50,407 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-04 12:47:50,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:50,408 INFO L225 Difference]: With dead ends: 119 [2018-10-04 12:47:50,408 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 12:47:50,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.3s impTime 13 [2018-10-04 12:47:50,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 12:47:50,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-04 12:47:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 12:47:50,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-04 12:47:50,416 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-10-04 12:47:50,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:50,416 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-04 12:47:50,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:47:50,417 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-04 12:47:50,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 12:47:50,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:50,418 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-10-04 12:47:50,418 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:50,418 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:50,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-10-04 12:47:50,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:50,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:50,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:50,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:50,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:50,855 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:51,084 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:51,554 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:51,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:51,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:51,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:51,959 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:51,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:51,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:53,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:53,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 12:47:53,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:47:53,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:47:53,028 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:53,028 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-10-04 12:47:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:53,165 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-04 12:47:53,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:47:53,165 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-04 12:47:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:53,166 INFO L225 Difference]: With dead ends: 121 [2018-10-04 12:47:53,166 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 12:47:53,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 1.1s impTime 14 [2018-10-04 12:47:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 12:47:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-04 12:47:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 12:47:53,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-04 12:47:53,170 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-10-04 12:47:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:53,170 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-04 12:47:53,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:47:53,171 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-04 12:47:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 12:47:53,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:53,171 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-10-04 12:47:53,172 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:53,172 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:53,172 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-10-04 12:47:53,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:53,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:53,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:53,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:53,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:53,488 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:53,874 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:54,495 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:54,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:54,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:54,641 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:55,181 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-04 12:47:55,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:55,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:57,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:57,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 12:47:57,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:47:57,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:47:57,274 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:57,274 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-10-04 12:47:57,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:57,368 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-04 12:47:57,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:47:57,368 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-04 12:47:57,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:57,369 INFO L225 Difference]: With dead ends: 123 [2018-10-04 12:47:57,369 INFO L226 Difference]: Without dead ends: 121 [2018-10-04 12:47:57,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 1.1s impTime 15 [2018-10-04 12:47:57,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-04 12:47:57,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-04 12:47:57,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 12:47:57,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-10-04 12:47:57,373 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-10-04 12:47:57,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:57,373 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-10-04 12:47:57,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:47:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-10-04 12:47:57,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-04 12:47:57,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:57,374 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-10-04 12:47:57,374 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:57,375 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:57,375 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-10-04 12:47:57,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:57,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:57,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:57,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:57,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:57,814 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:58,133 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:58,636 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:59,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:59,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:47:59,031 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:47:59,073 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:47:59,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:59,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:59,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:59,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 12:47:59,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 12:47:59,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 12:47:59,398 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:59,398 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-10-04 12:47:59,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:59,534 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-04 12:47:59,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:47:59,534 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-04 12:47:59,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:59,535 INFO L225 Difference]: With dead ends: 125 [2018-10-04 12:47:59,535 INFO L226 Difference]: Without dead ends: 123 [2018-10-04 12:47:59,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 16 [2018-10-04 12:47:59,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-04 12:47:59,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-04 12:47:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-04 12:47:59,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-04 12:47:59,540 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-10-04 12:47:59,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:59,540 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-04 12:47:59,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 12:47:59,541 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-04 12:47:59,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 12:47:59,541 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:59,542 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-10-04 12:47:59,542 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:59,542 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:59,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-10-04 12:47:59,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:59,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:59,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:59,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:59,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:59,953 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:00,265 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:00,777 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:01,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:01,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:01,273 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:48:03,195 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-04 12:48:03,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:03,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:03,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:03,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 12:48:03,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:48:03,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:48:03,649 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:03,649 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-10-04 12:48:03,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:03,789 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-04 12:48:03,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:48:03,789 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-04 12:48:03,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:03,790 INFO L225 Difference]: With dead ends: 127 [2018-10-04 12:48:03,790 INFO L226 Difference]: Without dead ends: 125 [2018-10-04 12:48:03,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.4s impTime 17 [2018-10-04 12:48:03,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-04 12:48:03,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-04 12:48:03,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 12:48:03,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-04 12:48:03,795 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-10-04 12:48:03,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:03,795 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-04 12:48:03,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:48:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-04 12:48:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-04 12:48:03,796 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:03,796 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-10-04 12:48:03,796 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:03,796 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:03,797 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-10-04 12:48:03,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:03,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:03,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:03,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:03,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:04,038 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:04,443 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:05,032 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:05,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:05,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:05,584 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:48:06,096 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-04 12:48:06,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:06,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:06,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:06,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-04 12:48:06,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 12:48:06,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 12:48:06,327 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:06,327 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-10-04 12:48:06,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:06,473 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-04 12:48:06,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:48:06,474 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-10-04 12:48:06,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:06,474 INFO L225 Difference]: With dead ends: 129 [2018-10-04 12:48:06,475 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 12:48:06,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.5s impTime 18 [2018-10-04 12:48:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 12:48:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-04 12:48:06,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-04 12:48:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-04 12:48:06,477 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-10-04 12:48:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:06,477 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-04 12:48:06,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 12:48:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-04 12:48:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-04 12:48:06,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:06,478 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-10-04 12:48:06,478 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:06,478 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:06,478 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-10-04 12:48:06,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:06,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:06,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:06,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:06,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:06,756 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:06,922 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:07,264 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:07,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:07,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:07,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:07,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:08,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:08,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 12:48:08,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 12:48:08,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 12:48:08,168 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:08,168 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-10-04 12:48:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:08,283 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-04 12:48:08,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 12:48:08,284 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-04 12:48:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:08,284 INFO L225 Difference]: With dead ends: 131 [2018-10-04 12:48:08,284 INFO L226 Difference]: Without dead ends: 129 [2018-10-04 12:48:08,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.9s impTime 19 [2018-10-04 12:48:08,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-04 12:48:08,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-04 12:48:08,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-04 12:48:08,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-04 12:48:08,287 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-10-04 12:48:08,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:08,287 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-04 12:48:08,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 12:48:08,287 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-04 12:48:08,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 12:48:08,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:08,288 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-10-04 12:48:08,288 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:08,289 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:08,289 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-10-04 12:48:08,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:08,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:08,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:08,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:08,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:08,585 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:08,893 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:09,099 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:09,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:09,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:09,425 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:48:09,469 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:48:09,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:09,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:09,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:09,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 12:48:09,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:48:09,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:48:09,726 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:09,726 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-10-04 12:48:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:09,840 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-04 12:48:09,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:48:09,841 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-10-04 12:48:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:09,841 INFO L225 Difference]: With dead ends: 133 [2018-10-04 12:48:09,842 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 12:48:09,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 20 [2018-10-04 12:48:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 12:48:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-04 12:48:09,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 12:48:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-04 12:48:09,844 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-10-04 12:48:09,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:09,845 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-04 12:48:09,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:48:09,845 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-04 12:48:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-04 12:48:09,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:09,846 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-10-04 12:48:09,846 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:09,846 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:09,846 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-10-04 12:48:09,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:09,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:09,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:09,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:09,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:10,114 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:10,308 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:10,600 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:11,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:11,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:11,039 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:48:11,772 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-04 12:48:11,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:11,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:12,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:12,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 12:48:12,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 12:48:12,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 12:48:12,037 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:12,037 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-10-04 12:48:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:12,148 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-04 12:48:12,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 12:48:12,148 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-04 12:48:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:12,149 INFO L225 Difference]: With dead ends: 135 [2018-10-04 12:48:12,149 INFO L226 Difference]: Without dead ends: 133 [2018-10-04 12:48:12,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 21 [2018-10-04 12:48:12,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-04 12:48:12,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-04 12:48:12,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 12:48:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-04 12:48:12,152 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-10-04 12:48:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:12,152 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-04 12:48:12,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 12:48:12,153 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-04 12:48:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 12:48:12,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:12,153 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-10-04 12:48:12,154 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:12,154 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:12,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-10-04 12:48:12,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:12,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:12,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:12,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:12,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:12,408 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:12,818 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:13,675 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:14,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:14,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:14,470 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:48:14,538 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:48:14,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:14,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:14,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:14,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 12:48:14,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 12:48:14,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 12:48:14,985 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:14,985 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-10-04 12:48:15,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:15,140 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-04 12:48:15,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:48:15,140 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-10-04 12:48:15,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:15,141 INFO L225 Difference]: With dead ends: 137 [2018-10-04 12:48:15,141 INFO L226 Difference]: Without dead ends: 135 [2018-10-04 12:48:15,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.0s impTime 22 [2018-10-04 12:48:15,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-04 12:48:15,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-04 12:48:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-04 12:48:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-04 12:48:15,145 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-10-04 12:48:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:15,145 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-04 12:48:15,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 12:48:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-04 12:48:15,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 12:48:15,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:15,146 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-10-04 12:48:15,146 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:15,146 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:15,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-10-04 12:48:15,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:15,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:15,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:15,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:15,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:15,402 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:15,598 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:15,988 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:16,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:16,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:16,809 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:48:19,549 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-04 12:48:19,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:19,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:19,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:19,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 12:48:19,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:48:19,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:48:19,843 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:19,843 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-10-04 12:48:20,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:20,010 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-04 12:48:20,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 12:48:20,010 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-04 12:48:20,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:20,011 INFO L225 Difference]: With dead ends: 139 [2018-10-04 12:48:20,011 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 12:48:20,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 23 [2018-10-04 12:48:20,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 12:48:20,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-04 12:48:20,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-04 12:48:20,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-04 12:48:20,015 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-10-04 12:48:20,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:20,015 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-04 12:48:20,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 12:48:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-04 12:48:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-04 12:48:20,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:20,016 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-10-04 12:48:20,016 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:20,016 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:20,017 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-10-04 12:48:20,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:20,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:20,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:20,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:20,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:20,268 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:20,460 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:20,765 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:21,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:21,325 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:21,333 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:48:22,029 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-04 12:48:22,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:22,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:22,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:22,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-04 12:48:22,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 12:48:22,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 12:48:22,286 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:22,287 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-10-04 12:48:22,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:22,424 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-04 12:48:22,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 12:48:22,425 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-10-04 12:48:22,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:22,426 INFO L225 Difference]: With dead ends: 141 [2018-10-04 12:48:22,426 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 12:48:22,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 24 [2018-10-04 12:48:22,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 12:48:22,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-04 12:48:22,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 12:48:22,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-04 12:48:22,429 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-10-04 12:48:22,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:22,429 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-04 12:48:22,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 12:48:22,429 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-04 12:48:22,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 12:48:22,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:22,430 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-10-04 12:48:22,430 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:22,430 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:22,431 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-10-04 12:48:22,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:22,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:22,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:22,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:22,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:22,631 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:22,935 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:23,624 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:24,570 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:24,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:24,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:24,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:24,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:24,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:24,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 12:48:24,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 12:48:24,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 12:48:24,880 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:24,880 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-10-04 12:48:25,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:25,057 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-04 12:48:25,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 12:48:25,058 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-04 12:48:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:25,059 INFO L225 Difference]: With dead ends: 143 [2018-10-04 12:48:25,059 INFO L226 Difference]: Without dead ends: 141 [2018-10-04 12:48:25,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime 8 [2018-10-04 12:48:25,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-04 12:48:25,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-04 12:48:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-04 12:48:25,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-04 12:48:25,061 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-10-04 12:48:25,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:25,061 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-04 12:48:25,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 12:48:25,062 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-04 12:48:25,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 12:48:25,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:25,062 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-10-04 12:48:25,063 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:25,063 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:25,063 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-10-04 12:48:25,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:25,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:25,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:25,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:25,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:25,233 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:25,725 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:26,060 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:27,018 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:27,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:27,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:27,102 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:48:27,152 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:48:27,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:27,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:27,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:27,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 12:48:27,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:48:27,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:48:27,405 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:27,405 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-10-04 12:48:27,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:27,609 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-04 12:48:27,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:48:27,610 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-10-04 12:48:27,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:27,611 INFO L225 Difference]: With dead ends: 145 [2018-10-04 12:48:27,611 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 12:48:27,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.7s impTime 9 [2018-10-04 12:48:27,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 12:48:27,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-04 12:48:27,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 12:48:27,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-04 12:48:27,615 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-10-04 12:48:27,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:27,615 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-04 12:48:27,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:48:27,615 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-04 12:48:27,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 12:48:27,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:27,616 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-10-04 12:48:27,617 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:27,617 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:27,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-10-04 12:48:27,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:27,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:27,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:27,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:27,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:27,893 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:28,329 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:29,096 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:30,042 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:30,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:30,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:30,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:48:31,199 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-04 12:48:31,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:31,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:31,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:31,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 12:48:31,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 12:48:31,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 12:48:31,692 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:31,692 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-10-04 12:48:31,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:31,880 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-04 12:48:31,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:48:31,880 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-04 12:48:31,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:31,881 INFO L225 Difference]: With dead ends: 147 [2018-10-04 12:48:31,881 INFO L226 Difference]: Without dead ends: 145 [2018-10-04 12:48:31,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.2s impTime 10 [2018-10-04 12:48:31,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-04 12:48:31,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-04 12:48:31,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 12:48:31,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-10-04 12:48:31,884 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-10-04 12:48:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:31,884 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-10-04 12:48:31,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 12:48:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-10-04 12:48:31,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-04 12:48:31,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:31,885 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-10-04 12:48:31,885 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:31,886 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:31,886 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-10-04 12:48:31,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:31,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:31,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:31,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:31,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:32,078 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:32,437 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:33,004 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:34,244 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:34,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:34,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:34,449 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:48:34,500 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:48:34,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:34,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:34,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:34,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 12:48:34,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 12:48:34,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 12:48:34,751 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:34,751 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-10-04 12:48:34,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:34,949 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-04 12:48:34,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 12:48:34,949 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-10-04 12:48:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:34,950 INFO L225 Difference]: With dead ends: 149 [2018-10-04 12:48:34,950 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 12:48:34,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.2s impTime 11 [2018-10-04 12:48:34,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 12:48:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-04 12:48:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 12:48:34,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-04 12:48:34,953 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-10-04 12:48:34,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:34,953 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-04 12:48:34,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 12:48:34,953 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-04 12:48:34,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 12:48:34,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:34,954 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-10-04 12:48:34,954 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:34,954 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:34,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-10-04 12:48:34,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:34,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:34,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:34,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:34,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:35,179 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:35,398 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:35,755 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:36,703 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:36,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:36,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:36,966 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:48:40,842 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-04 12:48:40,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:40,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:41,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:41,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 12:48:41,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:48:41,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:48:41,125 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:41,125 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-10-04 12:48:41,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:41,315 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-04 12:48:41,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 12:48:41,316 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-04 12:48:41,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:41,317 INFO L225 Difference]: With dead ends: 151 [2018-10-04 12:48:41,317 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 12:48:41,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.6s impTime 12 [2018-10-04 12:48:41,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 12:48:41,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-04 12:48:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 12:48:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-04 12:48:41,320 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-10-04 12:48:41,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:41,321 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-04 12:48:41,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:48:41,321 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-04 12:48:41,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 12:48:41,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:41,322 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-10-04 12:48:41,322 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:41,322 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:41,322 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-10-04 12:48:41,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:41,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:41,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:41,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:41,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:41,700 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:42,059 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:42,527 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:42,788 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:42,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:42,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:42,923 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:48:43,857 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-04 12:48:43,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:43,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:44,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:44,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-04 12:48:44,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 12:48:44,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 12:48:44,183 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:44,183 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-10-04 12:48:44,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:44,320 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-04 12:48:44,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:48:44,321 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-10-04 12:48:44,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:44,325 INFO L225 Difference]: With dead ends: 153 [2018-10-04 12:48:44,325 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 12:48:44,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime 13 [2018-10-04 12:48:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 12:48:44,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-04 12:48:44,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 12:48:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-04 12:48:44,328 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-10-04 12:48:44,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:44,329 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-04 12:48:44,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 12:48:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-04 12:48:44,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-04 12:48:44,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:44,330 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-10-04 12:48:44,330 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:44,330 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:44,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-10-04 12:48:44,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:44,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:44,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:44,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:44,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:44,606 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:44,985 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:45,562 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:46,513 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:46,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:46,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:46,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:46,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:47,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:47,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 12:48:47,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 12:48:47,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 12:48:47,232 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:47,232 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-10-04 12:48:47,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:47,454 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-04 12:48:47,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 12:48:47,454 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-04 12:48:47,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:47,455 INFO L225 Difference]: With dead ends: 155 [2018-10-04 12:48:47,455 INFO L226 Difference]: Without dead ends: 153 [2018-10-04 12:48:47,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.2s impTime 14 [2018-10-04 12:48:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-04 12:48:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-04 12:48:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-04 12:48:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-04 12:48:47,459 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-10-04 12:48:47,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:47,459 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-04 12:48:47,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 12:48:47,459 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-04 12:48:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 12:48:47,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:47,460 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-10-04 12:48:47,461 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:47,461 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:47,461 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-10-04 12:48:47,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:47,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:47,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:47,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:47,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:47,723 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:48,107 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:48,342 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:48,841 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:49,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:49,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:49,217 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:48:49,269 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:48:49,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:49,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:49,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:49,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 12:48:49,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 12:48:49,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 12:48:49,557 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:49,557 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-10-04 12:48:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:49,705 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-04 12:48:49,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 12:48:49,705 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-10-04 12:48:49,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:49,706 INFO L225 Difference]: With dead ends: 157 [2018-10-04 12:48:49,706 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 12:48:49,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.2s impTime 15 [2018-10-04 12:48:49,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 12:48:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-04 12:48:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 12:48:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-04 12:48:49,709 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-10-04 12:48:49,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:49,709 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-04 12:48:49,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 12:48:49,709 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-04 12:48:49,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-04 12:48:49,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:49,710 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-10-04 12:48:49,710 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:49,710 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:49,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-10-04 12:48:49,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:49,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:49,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:49,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:49,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:49,907 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:50,210 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:50,718 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:51,682 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:51,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:51,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:51,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:48:53,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-04 12:48:53,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:53,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:53,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:53,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 12:48:53,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 12:48:53,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 12:48:53,625 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:53,625 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-10-04 12:48:53,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:53,809 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-04 12:48:53,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 12:48:53,809 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-04 12:48:53,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:53,810 INFO L225 Difference]: With dead ends: 159 [2018-10-04 12:48:53,810 INFO L226 Difference]: Without dead ends: 157 [2018-10-04 12:48:53,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.9s impTime 16 [2018-10-04 12:48:53,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-04 12:48:53,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-04 12:48:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 12:48:53,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-10-04 12:48:53,813 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-10-04 12:48:53,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:53,814 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-10-04 12:48:53,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 12:48:53,814 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-10-04 12:48:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-04 12:48:53,814 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:53,814 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-10-04 12:48:53,815 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:53,815 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:53,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-10-04 12:48:53,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:53,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:53,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:53,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:53,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:54,249 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:54,434 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:54,797 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:55,754 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:56,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:56,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:48:56,353 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:48:56,407 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:48:56,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:56,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:56,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:56,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-04 12:48:56,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 12:48:56,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 12:48:56,676 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:56,676 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-10-04 12:48:57,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:57,344 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-04 12:48:57,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 12:48:57,345 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-10-04 12:48:57,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:57,345 INFO L225 Difference]: With dead ends: 161 [2018-10-04 12:48:57,346 INFO L226 Difference]: Without dead ends: 159 [2018-10-04 12:48:57,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.2s impTime 17 [2018-10-04 12:48:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-04 12:48:57,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-04 12:48:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-04 12:48:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-04 12:48:57,352 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-10-04 12:48:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:57,352 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-04 12:48:57,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-04 12:48:57,352 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-04 12:48:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 12:48:57,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:57,353 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-10-04 12:48:57,353 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:57,354 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:57,354 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-10-04 12:48:57,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:57,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:57,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:57,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:57,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:57,691 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:57,857 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:58,248 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:59,438 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:00,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:00,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:49:00,098 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:49:05,356 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-04 12:49:05,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:05,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:05,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:05,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 12:49:05,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:49:05,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:49:05,646 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:05,646 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-10-04 12:49:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:05,923 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-04 12:49:05,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 12:49:05,923 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-04 12:49:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:05,924 INFO L225 Difference]: With dead ends: 163 [2018-10-04 12:49:05,924 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 12:49:05,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.3s impTime 18 [2018-10-04 12:49:05,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 12:49:05,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-04 12:49:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 12:49:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-04 12:49:05,928 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-10-04 12:49:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:05,928 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-04 12:49:05,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:49:05,929 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-04 12:49:05,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-04 12:49:05,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:05,929 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-10-04 12:49:05,930 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:05,930 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:05,930 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-10-04 12:49:05,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:05,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:05,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:05,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:05,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:06,195 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:06,615 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:07,199 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:07,896 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:08,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:08,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:49:08,052 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:49:09,289 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-04 12:49:09,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:09,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:09,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:09,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-04 12:49:09,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-04 12:49:09,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-04 12:49:09,729 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:09,729 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-10-04 12:49:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:09,909 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-04 12:49:09,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 12:49:09,909 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-10-04 12:49:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:09,910 INFO L225 Difference]: With dead ends: 165 [2018-10-04 12:49:09,910 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 12:49:09,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 1.8s impTime 19 [2018-10-04 12:49:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 12:49:09,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-04 12:49:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-04 12:49:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-04 12:49:09,914 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-10-04 12:49:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:09,914 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-04 12:49:09,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-04 12:49:09,915 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-04 12:49:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-04 12:49:09,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:09,916 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-10-04 12:49:09,916 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:09,916 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:09,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-10-04 12:49:09,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:09,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:09,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:09,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:09,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:10,248 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:10,471 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:10,765 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:11,369 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:11,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:11,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:49:11,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:49:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:11,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:12,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:12,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 12:49:12,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 12:49:12,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 12:49:12,348 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:12,348 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-10-04 12:49:12,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:12,550 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-04 12:49:12,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 12:49:12,550 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-04 12:49:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:12,551 INFO L225 Difference]: With dead ends: 167 [2018-10-04 12:49:12,551 INFO L226 Difference]: Without dead ends: 165 [2018-10-04 12:49:12,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.6s impTime 20 [2018-10-04 12:49:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-04 12:49:12,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-04 12:49:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-04 12:49:12,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-04 12:49:12,554 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-10-04 12:49:12,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:12,555 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-04 12:49:12,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 12:49:12,555 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-04 12:49:12,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 12:49:12,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:12,556 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-10-04 12:49:12,556 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:12,556 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:12,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-10-04 12:49:12,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:12,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:12,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:12,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:49:12,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:12,826 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:13,132 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:13,435 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:14,565 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:15,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:15,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:49:15,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:49:15,570 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:49:15,570 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:15,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:15,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:15,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-04 12:49:15,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 12:49:15,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 12:49:15,858 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:15,858 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-10-04 12:49:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:16,145 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-04 12:49:16,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 12:49:16,145 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-10-04 12:49:16,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:16,146 INFO L225 Difference]: With dead ends: 169 [2018-10-04 12:49:16,146 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 12:49:16,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.5s impTime 21 [2018-10-04 12:49:16,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 12:49:16,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-04 12:49:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 12:49:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-04 12:49:16,149 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-10-04 12:49:16,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:16,149 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-04 12:49:16,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 12:49:16,149 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-04 12:49:16,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-04 12:49:16,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:16,150 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-10-04 12:49:16,150 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:16,150 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:16,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-10-04 12:49:16,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:16,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:16,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:16,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:16,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:16,731 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:16,907 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:17,249 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:18,259 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:19,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:19,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:49:19,108 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:49:20,958 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-04 12:49:20,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:20,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:21,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:21,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 12:49:21,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 12:49:21,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 12:49:21,254 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:21,254 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-10-04 12:49:21,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:21,499 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-10-04 12:49:21,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 12:49:21,500 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-04 12:49:21,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:21,500 INFO L225 Difference]: With dead ends: 171 [2018-10-04 12:49:21,500 INFO L226 Difference]: Without dead ends: 169 [2018-10-04 12:49:21,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.1s impTime 22 [2018-10-04 12:49:21,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-04 12:49:21,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-04 12:49:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-04 12:49:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-10-04 12:49:21,503 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-10-04 12:49:21,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:21,504 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-10-04 12:49:21,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 12:49:21,504 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-10-04 12:49:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-04 12:49:21,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:21,504 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-10-04 12:49:21,505 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:21,505 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:21,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-10-04 12:49:21,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:21,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:21,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:21,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:21,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:21,827 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:22,228 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:22,814 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:23,180 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:23,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:23,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:49:23,519 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:49:23,577 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:49:23,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:23,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:23,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:23,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-04 12:49:23,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-04 12:49:23,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-04 12:49:23,945 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:23,945 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-10-04 12:49:24,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:24,128 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-10-04 12:49:24,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 12:49:24,128 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-10-04 12:49:24,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:24,129 INFO L225 Difference]: With dead ends: 173 [2018-10-04 12:49:24,129 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 12:49:24,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.6s impTime 23 [2018-10-04 12:49:24,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 12:49:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-04 12:49:24,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 12:49:24,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-04 12:49:24,132 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-10-04 12:49:24,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:24,132 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-04 12:49:24,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-04 12:49:24,133 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-04 12:49:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 12:49:24,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:24,134 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-10-04 12:49:24,134 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:24,134 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:24,134 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-10-04 12:49:24,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:24,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:24,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:24,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:24,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:24,316 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:24,792 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:25,415 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:26,370 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:26,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:26,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:49:26,753 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:49:33,769 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-04 12:49:33,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:33,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:34,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:34,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 12:49:34,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 12:49:34,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 12:49:34,097 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:34,097 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-10-04 12:49:34,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:34,359 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-04 12:49:34,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 12:49:34,359 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-04 12:49:34,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:34,360 INFO L225 Difference]: With dead ends: 175 [2018-10-04 12:49:34,360 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 12:49:34,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.2s impTime 24 [2018-10-04 12:49:34,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 12:49:34,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-04 12:49:34,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-04 12:49:34,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-04 12:49:34,364 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-10-04 12:49:34,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:34,364 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-04 12:49:34,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 12:49:34,365 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-04 12:49:34,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-04 12:49:34,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:34,366 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-10-04 12:49:34,366 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:34,366 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:34,366 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-10-04 12:49:34,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:34,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:34,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:34,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:34,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:34,643 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:34,945 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:35,391 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:35,952 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:36,186 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:36,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:36,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:49:36,229 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:49:37,987 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-04 12:49:37,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:37,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:38,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:38,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-04 12:49:38,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-04 12:49:38,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-04 12:49:38,311 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:38,311 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-10-04 12:49:38,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:38,718 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-04 12:49:38,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 12:49:38,719 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-10-04 12:49:38,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:38,720 INFO L225 Difference]: With dead ends: 177 [2018-10-04 12:49:38,720 INFO L226 Difference]: Without dead ends: 175 [2018-10-04 12:49:38,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.3s impTime 8 [2018-10-04 12:49:38,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-04 12:49:38,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-04 12:49:38,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 12:49:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-10-04 12:49:38,724 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-10-04 12:49:38,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:38,725 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-10-04 12:49:38,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-04 12:49:38,725 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-10-04 12:49:38,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-04 12:49:38,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:38,726 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-10-04 12:49:38,726 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:38,726 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:38,727 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-10-04 12:49:38,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:38,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:38,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:38,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:38,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:38,925 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:39,149 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:39,497 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:39,695 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:40,109 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:40,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:40,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:49:40,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:49:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:40,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:40,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:40,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 12:49:40,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 12:49:40,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 12:49:40,582 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:40,582 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-10-04 12:49:40,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:40,771 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-10-04 12:49:40,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 12:49:40,771 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-04 12:49:40,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:40,772 INFO L225 Difference]: With dead ends: 179 [2018-10-04 12:49:40,772 INFO L226 Difference]: Without dead ends: 177 [2018-10-04 12:49:40,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 0.9s impTime 8 [2018-10-04 12:49:40,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-04 12:49:40,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-04 12:49:40,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-04 12:49:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-10-04 12:49:40,776 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-10-04 12:49:40,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:40,776 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-10-04 12:49:40,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 12:49:40,776 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-10-04 12:49:40,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-04 12:49:40,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:40,777 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-10-04 12:49:40,777 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:40,777 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:40,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-10-04 12:49:40,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:40,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:40,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:40,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:49:40,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:40,965 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:41,109 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:41,372 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:41,805 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:42,361 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:42,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:42,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:49:42,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:49:42,501 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:49:42,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:42,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:42,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:42,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-04 12:49:42,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 12:49:42,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 12:49:42,824 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:42,824 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-10-04 12:49:43,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:43,132 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-04 12:49:43,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 12:49:43,132 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-10-04 12:49:43,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:43,133 INFO L225 Difference]: With dead ends: 181 [2018-10-04 12:49:43,133 INFO L226 Difference]: Without dead ends: 179 [2018-10-04 12:49:43,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime 9 [2018-10-04 12:49:43,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-04 12:49:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-04 12:49:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-04 12:49:43,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-04 12:49:43,136 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-10-04 12:49:43,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:43,136 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-04 12:49:43,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 12:49:43,136 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-04 12:49:43,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-04 12:49:43,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:43,137 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-10-04 12:49:43,137 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:43,137 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:43,138 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-10-04 12:49:43,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:43,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:43,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:43,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:43,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:43,325 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:43,458 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:43,685 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:44,226 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:44,896 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:45,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:45,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:49:45,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:49:47,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-04 12:49:47,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:47,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:47,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:47,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 12:49:47,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 12:49:47,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 12:49:47,953 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:47,953 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-10-04 12:49:48,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:48,218 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-10-04 12:49:48,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 12:49:48,219 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-04 12:49:48,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:48,219 INFO L225 Difference]: With dead ends: 183 [2018-10-04 12:49:48,220 INFO L226 Difference]: Without dead ends: 181 [2018-10-04 12:49:48,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.5s impTime 11 [2018-10-04 12:49:48,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-04 12:49:48,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-04 12:49:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-04 12:49:48,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-10-04 12:49:48,224 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-10-04 12:49:48,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:48,224 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-10-04 12:49:48,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 12:49:48,225 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-10-04 12:49:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-04 12:49:48,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:48,225 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-10-04 12:49:48,225 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:48,226 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:48,226 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-10-04 12:49:48,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:48,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:48,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:48,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:48,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:48,398 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:48,537 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:48,855 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:49,292 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:49,836 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:49,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:49,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:49:49,988 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:49:50,051 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:49:50,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:50,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:50,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:50,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-04 12:49:50,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 12:49:50,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 12:49:50,510 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:50,510 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-10-04 12:49:50,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:50,787 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-10-04 12:49:50,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 12:49:50,787 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-10-04 12:49:50,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:50,788 INFO L225 Difference]: With dead ends: 185 [2018-10-04 12:49:50,788 INFO L226 Difference]: Without dead ends: 183 [2018-10-04 12:49:50,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.2s impTime 11 [2018-10-04 12:49:50,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-04 12:49:50,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-04 12:49:50,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-04 12:49:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-04 12:49:50,792 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-10-04 12:49:50,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:50,792 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-04 12:49:50,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 12:49:50,792 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-04 12:49:50,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 12:49:50,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:50,793 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-10-04 12:49:50,793 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:50,793 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:50,793 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-10-04 12:49:50,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:50,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:50,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:50,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:50,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:50,976 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:51,193 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:51,524 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:51,705 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:51,995 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:52,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:52,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:49:52,109 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:50:01,697 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-04 12:50:01,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:01,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:02,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:02,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 12:50:02,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 12:50:02,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 12:50:02,033 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:02,033 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-10-04 12:50:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:02,254 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-04 12:50:02,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 12:50:02,255 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-04 12:50:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:02,256 INFO L225 Difference]: With dead ends: 187 [2018-10-04 12:50:02,256 INFO L226 Difference]: Without dead ends: 185 [2018-10-04 12:50:02,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.9s impTime 12 [2018-10-04 12:50:02,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-04 12:50:02,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-04 12:50:02,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 12:50:02,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-10-04 12:50:02,259 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-10-04 12:50:02,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:02,259 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-10-04 12:50:02,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 12:50:02,259 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-10-04 12:50:02,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-04 12:50:02,260 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:02,260 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-10-04 12:50:02,260 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:02,260 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:02,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-10-04 12:50:02,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:02,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:02,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:02,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:02,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:02,488 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:02,675 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:02,970 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:03,497 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:03,727 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:03,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:03,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:50:03,830 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:50:05,966 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-04 12:50:05,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:05,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:06,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:06,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-04 12:50:06,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-04 12:50:06,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-04 12:50:06,305 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:06,305 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-10-04 12:50:06,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:06,578 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-04 12:50:06,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 12:50:06,578 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-10-04 12:50:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:06,579 INFO L225 Difference]: With dead ends: 189 [2018-10-04 12:50:06,579 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 12:50:06,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.1s impTime 14 [2018-10-04 12:50:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 12:50:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-04 12:50:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-04 12:50:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-10-04 12:50:06,583 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-10-04 12:50:06,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:06,584 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-10-04 12:50:06,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-04 12:50:06,584 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-10-04 12:50:06,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-04 12:50:06,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:06,585 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-10-04 12:50:06,585 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:06,585 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:06,586 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-10-04 12:50:06,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:06,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:06,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:06,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:06,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:06,757 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:06,939 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:07,225 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:07,754 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:08,010 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:08,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:08,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:50:08,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:50:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:08,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:08,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:08,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 12:50:08,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 12:50:08,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 12:50:08,511 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:08,511 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-10-04 12:50:08,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:08,770 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-10-04 12:50:08,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 12:50:08,771 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-10-04 12:50:08,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:08,772 INFO L225 Difference]: With dead ends: 191 [2018-10-04 12:50:08,772 INFO L226 Difference]: Without dead ends: 189 [2018-10-04 12:50:08,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.1s impTime 15 [2018-10-04 12:50:08,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-04 12:50:08,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-04 12:50:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-04 12:50:08,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-10-04 12:50:08,776 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-10-04 12:50:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:08,776 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-10-04 12:50:08,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 12:50:08,776 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-10-04 12:50:08,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 12:50:08,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:08,777 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-10-04 12:50:08,777 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:08,777 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:08,778 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-10-04 12:50:08,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:08,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:08,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:08,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:50:08,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:08,990 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:09,235 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:09,584 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:09,824 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:10,069 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:10,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:10,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:50:10,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:50:10,312 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:50:10,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:10,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:10,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:10,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-04 12:50:10,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-04 12:50:10,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-04 12:50:10,767 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:10,767 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-10-04 12:50:10,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:10,971 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-04 12:50:10,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 12:50:10,971 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-10-04 12:50:10,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:10,972 INFO L225 Difference]: With dead ends: 193 [2018-10-04 12:50:10,972 INFO L226 Difference]: Without dead ends: 191 [2018-10-04 12:50:10,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.0s impTime 16 [2018-10-04 12:50:10,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-04 12:50:10,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-04 12:50:10,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-04 12:50:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-04 12:50:10,977 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-10-04 12:50:10,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:10,978 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-04 12:50:10,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-04 12:50:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-04 12:50:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-04 12:50:10,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:10,979 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-10-04 12:50:10,979 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:10,979 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:10,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-10-04 12:50:10,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:10,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:10,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:10,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:10,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:11,180 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:11,290 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:11,491 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:11,881 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:12,432 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:12,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:12,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:50:12,745 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:50:16,261 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-04 12:50:16,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:16,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:16,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:16,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 12:50:16,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 12:50:16,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 12:50:16,593 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:16,594 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-10-04 12:50:16,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:16,954 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-10-04 12:50:16,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 12:50:16,954 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-10-04 12:50:16,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:16,955 INFO L225 Difference]: With dead ends: 195 [2018-10-04 12:50:16,955 INFO L226 Difference]: Without dead ends: 193 [2018-10-04 12:50:16,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 16 [2018-10-04 12:50:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-04 12:50:16,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-04 12:50:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-04 12:50:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-04 12:50:16,958 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-10-04 12:50:16,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:16,958 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-04 12:50:16,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 12:50:16,958 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-04 12:50:16,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-04 12:50:16,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:16,959 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-10-04 12:50:16,959 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:16,959 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:16,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-10-04 12:50:16,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:16,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:16,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:16,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:16,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:17,166 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:17,351 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:17,558 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:18,088 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:18,728 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:19,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:19,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:50:19,137 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:50:19,207 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:50:19,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:19,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:19,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:19,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-04 12:50:19,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 12:50:19,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 12:50:19,555 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:19,556 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-10-04 12:50:19,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:19,904 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-04 12:50:19,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 12:50:19,904 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-10-04 12:50:19,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:19,905 INFO L225 Difference]: With dead ends: 197 [2018-10-04 12:50:19,905 INFO L226 Difference]: Without dead ends: 195 [2018-10-04 12:50:19,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.7s impTime 17 [2018-10-04 12:50:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-04 12:50:19,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-04 12:50:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-04 12:50:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-10-04 12:50:19,908 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-10-04 12:50:19,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:19,909 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-10-04 12:50:19,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 12:50:19,909 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-10-04 12:50:19,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-04 12:50:19,909 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:19,909 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-10-04 12:50:19,910 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:19,910 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:19,910 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-10-04 12:50:19,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:19,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:19,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:19,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:19,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:20,124 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:20,248 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:20,427 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:20,769 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:21,440 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:21,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:21,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:50:21,833 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:50:34,511 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-04 12:50:34,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:34,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:34,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:34,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 12:50:34,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 12:50:34,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 12:50:34,856 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:34,856 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-10-04 12:50:35,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:35,183 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-04 12:50:35,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 12:50:35,183 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-10-04 12:50:35,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:35,184 INFO L225 Difference]: With dead ends: 199 [2018-10-04 12:50:35,184 INFO L226 Difference]: Without dead ends: 197 [2018-10-04 12:50:35,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.4s impTime 19 [2018-10-04 12:50:35,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-04 12:50:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-04 12:50:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-04 12:50:35,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-10-04 12:50:35,188 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-10-04 12:50:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:35,188 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-10-04 12:50:35,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 12:50:35,188 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-10-04 12:50:35,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-04 12:50:35,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:35,189 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-10-04 12:50:35,190 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:35,190 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:35,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-10-04 12:50:35,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:35,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:35,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:35,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:35,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:35,429 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:35,677 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:36,027 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:36,608 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:36,814 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:37,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:37,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:50:37,024 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:50:39,735 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-04 12:50:39,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:39,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:40,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:40,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-04 12:50:40,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-04 12:50:40,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-04 12:50:40,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:40,086 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-10-04 12:50:40,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:40,351 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-10-04 12:50:40,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 12:50:40,351 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-10-04 12:50:40,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:40,352 INFO L225 Difference]: With dead ends: 201 [2018-10-04 12:50:40,352 INFO L226 Difference]: Without dead ends: 199 [2018-10-04 12:50:40,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.3s impTime 19 [2018-10-04 12:50:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-04 12:50:40,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-04 12:50:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-04 12:50:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-10-04 12:50:40,357 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-10-04 12:50:40,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:40,357 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-10-04 12:50:40,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-04 12:50:40,357 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-10-04 12:50:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-04 12:50:40,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:40,358 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-10-04 12:50:40,358 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:40,359 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:40,359 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-10-04 12:50:40,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:40,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:40,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:40,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:40,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:40,576 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:40,687 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:40,914 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:41,594 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:42,266 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:42,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:42,377 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:50:42,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:50:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:42,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:42,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:42,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-04 12:50:42,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 12:50:42,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 12:50:42,810 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:42,811 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-10-04 12:50:43,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:43,130 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-10-04 12:50:43,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 12:50:43,130 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-10-04 12:50:43,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:43,131 INFO L225 Difference]: With dead ends: 203 [2018-10-04 12:50:43,131 INFO L226 Difference]: Without dead ends: 201 [2018-10-04 12:50:43,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.5s impTime 20 [2018-10-04 12:50:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-04 12:50:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-04 12:50:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-04 12:50:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-10-04 12:50:43,135 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-10-04 12:50:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:43,135 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-10-04 12:50:43,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 12:50:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-10-04 12:50:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-04 12:50:43,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:43,136 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-10-04 12:50:43,136 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:43,136 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:43,136 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-10-04 12:50:43,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:43,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:43,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:43,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:50:43,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:43,338 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:43,459 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:43,673 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:44,207 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:44,834 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:45,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:45,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:50:45,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:50:45,088 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:50:45,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:45,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:45,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:45,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-04 12:50:45,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-04 12:50:45,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-04 12:50:45,443 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:45,443 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-10-04 12:50:45,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:45,786 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-10-04 12:50:45,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 12:50:45,787 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-10-04 12:50:45,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:45,787 INFO L225 Difference]: With dead ends: 205 [2018-10-04 12:50:45,787 INFO L226 Difference]: Without dead ends: 203 [2018-10-04 12:50:45,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.4s impTime 22 [2018-10-04 12:50:45,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-04 12:50:45,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-04 12:50:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-04 12:50:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-10-04 12:50:45,791 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-10-04 12:50:45,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:45,791 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-10-04 12:50:45,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-04 12:50:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-10-04 12:50:45,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-04 12:50:45,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:45,792 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-10-04 12:50:45,792 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:45,792 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:45,792 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-10-04 12:50:45,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:45,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:45,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:45,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:45,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:46,120 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:46,310 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:46,856 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:47,408 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:47,661 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:47,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:47,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:50:47,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... [2018-10-04 12:50:52,150 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-10-04 12:50:52,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:52,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:52,168 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-04 12:50:52,369 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:50:52,370 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:50:52,375 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:50:52,375 INFO L202 PluginConnector]: Adding new model array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:50:52 BoogieIcfgContainer [2018-10-04 12:50:52,375 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:50:52,376 INFO L168 Benchmark]: Toolchain (without parser) took 247685.49 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 34.6 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 199.6 MB). Peak memory consumption was 234.2 MB. Max. memory is 7.1 GB. [2018-10-04 12:50:52,378 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:50:52,378 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.06 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:50:52,379 INFO L168 Benchmark]: Boogie Preprocessor took 20.92 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:50:52,379 INFO L168 Benchmark]: RCFGBuilder took 298.84 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:50:52,380 INFO L168 Benchmark]: TraceAbstraction took 247318.38 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 34.6 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 178.5 MB). Peak memory consumption was 213.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:50:52,383 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.06 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.92 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 298.84 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 247318.38 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 34.6 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 178.5 MB). Peak memory consumption was 213.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 37). Cancelled while BasicCegarLoop was analyzing trace of length 203 with TraceHistMax 100, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 247.2s OverallTime, 100 OverallIterations, 100 TraceHistogramMax, 15.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 396 SDtfs, 0 SDslu, 7778 SDs, 0 SdLazy, 7877 SolverSat, 176 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15045 GetRequests, 10095 SyntacticMatches, 0 SemanticMatches, 4950 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 139.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=203occurred in iteration=99, 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, 99 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 73.1s SatisfiabilityAnalysisTime, 145.3s InterpolantComputationTime, 20192 NumberOfCodeBlocks, 20192 NumberOfCodeBlocksAsserted, 2614 NumberOfCheckSat, 19995 ConstructedInterpolants, 0 QuantifiedInterpolants, 7959777 SizeOfPredicates, 98 NumberOfNonLiveVariables, 25529 ConjunctsInSsa, 5047 ConjunctsInUnsatCore, 197 InterpolantComputations, 1 PerfectInterpolantSequences, 0/646800 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/array1.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-50-52-394.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array1.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-50-52-394.csv Completed graceful shutdown