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/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 12:21:25,417 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 12:21:25,419 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 12:21:25,432 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 12:21:25,432 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 12:21:25,433 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 12:21:25,434 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 12:21:25,436 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 12:21:25,437 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 12:21:25,438 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 12:21:25,439 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 12:21:25,474 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-02 12:21:25,502 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 12:21:25,502 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 12:21:25,503 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 12:21:25,504 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 12:21:25,505 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 12:21:25,505 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 12:21:25,505 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 12:21:25,505 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 12:21:25,506 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 12:21:25,506 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 12:21:25,506 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 12:21:25,506 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 12:21:25,507 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 12:21:25,508 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 12:21:25,508 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 12:21:25,508 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 12:21:25,508 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 12:21:25,508 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 12:21:25,509 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 12:21:25,509 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 12:21:25,509 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 12:21:25,509 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 12:21:25,511 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:21:25,511 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 12:21:25,511 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 12:21:25,512 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 12:21:25,512 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 12:21:25,512 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 12:21:25,512 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 12:21:25,512 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 12:21:25,512 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-02 12:21:25,574 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 12:21:25,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 12:21:25,593 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 12:21:25,595 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 12:21:25,596 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 12:21:25,597 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl [2018-10-02 12:21:25,597 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl' [2018-10-02 12:21:25,647 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 12:21:25,650 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 12:21:25,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 12:21:25,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 12:21:25,651 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 12:21:25,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:21:25" (1/1) ... [2018-10-02 12:21:25,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:21:25" (1/1) ... [2018-10-02 12:21:25,690 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-02 12:21:25,691 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-02 12:21:25,691 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-02 12:21:25,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 12:21:25,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 12:21:25,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 12:21:25,694 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 12:21:25,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:21:25" (1/1) ... [2018-10-02 12:21:25,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:21:25" (1/1) ... [2018-10-02 12:21:25,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:21:25" (1/1) ... [2018-10-02 12:21:25,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:21:25" (1/1) ... [2018-10-02 12:21:25,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:21:25" (1/1) ... [2018-10-02 12:21:25,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:21:25" (1/1) ... [2018-10-02 12:21:25,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:21:25" (1/1) ... [2018-10-02 12:21:25,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 12:21:25,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 12:21:25,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 12:21:25,719 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 12:21:25,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:21:25" (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 [2018-10-02 12:21:25,792 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-02 12:21:25,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-02 12:21:25,792 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-02 12:21:25,987 INFO L337 CfgBuilder]: Using library mode [2018-10-02 12:21:25,987 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:21:25 BoogieIcfgContainer [2018-10-02 12:21:25,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 12:21:25,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 12:21:25,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 12:21:25,993 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 12:21:25,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:21:25" (1/2) ... [2018-10-02 12:21:25,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3154cc and model type MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:21:25, skipping insertion in model container [2018-10-02 12:21:25,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:21:25" (2/2) ... [2018-10-02 12:21:25,999 INFO L112 eAbstractionObserver]: Analyzing ICFG MonadicInvariant01.bpl [2018-10-02 12:21:26,007 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 12:21:26,015 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 12:21:26,062 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 12:21:26,063 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 12:21:26,063 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 12:21:26,063 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 12:21:26,063 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 12:21:26,063 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 12:21:26,063 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 12:21:26,064 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 12:21:26,064 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 12:21:26,079 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-02 12:21:26,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-02 12:21:26,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:26,086 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-02 12:21:26,088 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:26,094 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:26,094 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-10-02 12:21:26,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:26,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:26,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:26,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:26,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:26,236 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 12:21:26,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-02 12:21:26,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 12:21:26,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 12:21:26,253 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:26,256 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-02 12:21:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:26,487 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 12:21:26,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 12:21:26,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-02 12:21:26,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:26,503 INFO L225 Difference]: With dead ends: 11 [2018-10-02 12:21:26,503 INFO L226 Difference]: Without dead ends: 6 [2018-10-02 12:21:26,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:21:26,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-02 12:21:26,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-02 12:21:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-02 12:21:26,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-02 12:21:26,543 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-10-02 12:21:26,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:26,544 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-02 12:21:26,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 12:21:26,544 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-02 12:21:26,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 12:21:26,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:26,545 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-02 12:21:26,545 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:26,545 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:26,545 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-10-02 12:21:26,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:26,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:26,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:26,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:26,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:26,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:26,619 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 [2018-10-02 12:21:26,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:26,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:26,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:26,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-10-02 12:21:26,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 12:21:26,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 12:21:26,756 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:26,756 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-10-02 12:21:26,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:26,937 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-02 12:21:26,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 12:21:26,938 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-10-02 12:21:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:26,939 INFO L225 Difference]: With dead ends: 9 [2018-10-02 12:21:26,939 INFO L226 Difference]: Without dead ends: 8 [2018-10-02 12:21:26,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:21:26,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-02 12:21:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-02 12:21:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 12:21:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-02 12:21:26,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-10-02 12:21:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:26,945 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-02 12:21:26,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 12:21:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-02 12:21:26,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 12:21:26,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:26,946 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-10-02 12:21:26,946 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:26,947 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:26,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-10-02 12:21:26,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:26,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:26,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:26,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:26,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:27,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:27,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:21:27,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:21:27,088 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:21:27,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:27,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:27,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:27,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-10-02 12:21:27,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 12:21:27,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 12:21:27,188 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:27,188 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-10-02 12:21:27,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:27,582 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 12:21:27,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 12:21:27,583 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-10-02 12:21:27,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:27,583 INFO L225 Difference]: With dead ends: 11 [2018-10-02 12:21:27,583 INFO L226 Difference]: Without dead ends: 10 [2018-10-02 12:21:27,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:21:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-02 12:21:27,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-02 12:21:27,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 12:21:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-02 12:21:27,587 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-10-02 12:21:27,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:27,588 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-02 12:21:27,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 12:21:27,588 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-02 12:21:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 12:21:27,589 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:27,589 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-10-02 12:21:27,590 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:27,590 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:27,590 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-10-02 12:21:27,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:27,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:27,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:27,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:27,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:27,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:27,661 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 [2018-10-02 12:21:27,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:21:27,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 12:21:27,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:27,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:27,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:27,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-10-02 12:21:27,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 12:21:27,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 12:21:27,911 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:27,911 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-10-02 12:21:28,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:28,032 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 12:21:28,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 12:21:28,033 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-10-02 12:21:28,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:28,034 INFO L225 Difference]: With dead ends: 13 [2018-10-02 12:21:28,034 INFO L226 Difference]: Without dead ends: 12 [2018-10-02 12:21:28,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:21:28,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-02 12:21:28,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-02 12:21:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 12:21:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-02 12:21:28,038 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-10-02 12:21:28,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:28,039 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-02 12:21:28,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 12:21:28,039 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-02 12:21:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 12:21:28,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:28,040 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-10-02 12:21:28,040 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:28,040 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:28,041 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-10-02 12:21:28,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:28,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:28,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:28,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:28,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:28,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:28,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:21:28,491 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:21:28,517 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:21:28,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:28,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:28,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:28,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-02 12:21:28,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 12:21:28,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 12:21:28,650 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:28,650 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-10-02 12:21:28,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:28,890 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 12:21:28,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 12:21:28,891 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-10-02 12:21:28,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:28,892 INFO L225 Difference]: With dead ends: 15 [2018-10-02 12:21:28,892 INFO L226 Difference]: Without dead ends: 14 [2018-10-02 12:21:28,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime [2018-10-02 12:21:28,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-02 12:21:28,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-02 12:21:28,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 12:21:28,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-02 12:21:28,897 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-02 12:21:28,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:28,897 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-02 12:21:28,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 12:21:28,897 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-02 12:21:28,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 12:21:28,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:28,898 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-10-02 12:21:28,898 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:28,899 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:28,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-10-02 12:21:28,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:28,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:28,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:28,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:28,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:29,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:29,010 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 [2018-10-02 12:21:29,019 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:21:29,027 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 12:21:29,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:29,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:29,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:29,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-10-02 12:21:29,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 12:21:29,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 12:21:29,149 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:29,149 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-10-02 12:21:29,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:29,372 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 12:21:29,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 12:21:29,373 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-10-02 12:21:29,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:29,374 INFO L225 Difference]: With dead ends: 17 [2018-10-02 12:21:29,374 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 12:21:29,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:21:29,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 12:21:29,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-02 12:21:29,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 12:21:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-02 12:21:29,379 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-02 12:21:29,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:29,380 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-02 12:21:29,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 12:21:29,380 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-02 12:21:29,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 12:21:29,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:29,381 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-10-02 12:21:29,381 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:29,381 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:29,381 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-10-02 12:21:29,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:29,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:29,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:29,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:29,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:29,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:29,530 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 [2018-10-02 12:21:29,538 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:21:29,546 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 12:21:29,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:29,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:29,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:29,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-10-02 12:21:29,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 12:21:29,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 12:21:29,828 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:29,828 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-10-02 12:21:29,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:29,945 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 12:21:29,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 12:21:29,946 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-10-02 12:21:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:29,947 INFO L225 Difference]: With dead ends: 19 [2018-10-02 12:21:29,947 INFO L226 Difference]: Without dead ends: 18 [2018-10-02 12:21:29,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:21:29,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-02 12:21:29,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-02 12:21:29,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 12:21:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-02 12:21:29,952 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-02 12:21:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:29,952 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-02 12:21:29,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 12:21:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-02 12:21:29,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 12:21:29,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:29,953 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-10-02 12:21:29,953 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:29,954 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:29,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-10-02 12:21:29,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:29,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:29,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:29,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:29,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:30,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:30,070 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 [2018-10-02 12:21:30,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:30,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:30,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:30,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-02 12:21:30,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 12:21:30,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 12:21:30,253 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:30,253 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-10-02 12:21:30,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:30,485 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 12:21:30,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 12:21:30,485 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-10-02 12:21:30,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:30,486 INFO L225 Difference]: With dead ends: 21 [2018-10-02 12:21:30,486 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 12:21:30,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:21:30,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 12:21:30,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-02 12:21:30,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 12:21:30,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-02 12:21:30,490 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-02 12:21:30,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:30,491 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-02 12:21:30,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 12:21:30,491 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-02 12:21:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 12:21:30,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:30,492 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-10-02 12:21:30,492 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:30,492 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:30,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-10-02 12:21:30,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:30,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:30,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:30,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:30,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:30,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:30,611 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 [2018-10-02 12:21:30,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:21:30,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:21:30,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:30,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:30,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:30,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-10-02 12:21:30,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 12:21:30,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 12:21:30,782 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:30,783 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-10-02 12:21:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:30,970 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 12:21:30,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 12:21:30,971 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-10-02 12:21:30,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:30,972 INFO L225 Difference]: With dead ends: 23 [2018-10-02 12:21:30,973 INFO L226 Difference]: Without dead ends: 22 [2018-10-02 12:21:30,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:21:30,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-02 12:21:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-02 12:21:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 12:21:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-02 12:21:30,978 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-10-02 12:21:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:30,979 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-02 12:21:30,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 12:21:30,979 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-02 12:21:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-02 12:21:30,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:30,980 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-10-02 12:21:30,980 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:30,980 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:30,980 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-10-02 12:21:30,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:30,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:30,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:30,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:30,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:31,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:31,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:21:31,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:21:31,136 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-02 12:21:31,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:31,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:31,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:31,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-10-02 12:21:31,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 12:21:31,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 12:21:31,401 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:31,401 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-10-02 12:21:31,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:31,909 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 12:21:31,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 12:21:31,910 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-10-02 12:21:31,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:31,911 INFO L225 Difference]: With dead ends: 25 [2018-10-02 12:21:31,911 INFO L226 Difference]: Without dead ends: 24 [2018-10-02 12:21:31,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime [2018-10-02 12:21:31,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-02 12:21:31,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-02 12:21:31,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 12:21:31,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-02 12:21:31,917 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-10-02 12:21:31,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:31,917 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-02 12:21:31,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 12:21:31,917 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-02 12:21:31,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-02 12:21:31,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:31,918 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-10-02 12:21:31,918 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:31,919 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:31,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-10-02 12:21:31,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:31,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:31,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:31,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:31,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:32,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:32,065 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 [2018-10-02 12:21:32,072 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:21:32,082 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:21:32,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:32,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:32,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:32,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-02 12:21:32,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 12:21:32,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 12:21:32,356 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:32,356 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-10-02 12:21:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:32,563 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 12:21:32,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 12:21:32,564 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-10-02 12:21:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:32,565 INFO L225 Difference]: With dead ends: 27 [2018-10-02 12:21:32,565 INFO L226 Difference]: Without dead ends: 26 [2018-10-02 12:21:32,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:21:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-02 12:21:32,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-02 12:21:32,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 12:21:32,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-02 12:21:32,570 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-10-02 12:21:32,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:32,571 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-02 12:21:32,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 12:21:32,571 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-02 12:21:32,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-02 12:21:32,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:32,572 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-10-02 12:21:32,572 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:32,572 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:32,572 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-10-02 12:21:32,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:32,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:32,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:32,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:32,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:32,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:32,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:21:32,857 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:21:32,874 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 12:21:32,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:32,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:33,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:33,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-02 12:21:33,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 12:21:33,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 12:21:33,421 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:33,421 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-10-02 12:21:33,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:33,604 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 12:21:33,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 12:21:33,604 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-10-02 12:21:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:33,605 INFO L225 Difference]: With dead ends: 29 [2018-10-02 12:21:33,606 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 12:21:33,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime [2018-10-02 12:21:33,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 12:21:33,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-02 12:21:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 12:21:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-02 12:21:33,611 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-10-02 12:21:33,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:33,612 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-02 12:21:33,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 12:21:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-02 12:21:33,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-02 12:21:33,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:33,613 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-10-02 12:21:33,613 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:33,613 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:33,613 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-10-02 12:21:33,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:33,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:33,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:33,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:33,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:33,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:33,824 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:21:33,839 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:21:33,915 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 12:21:33,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:33,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:34,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:34,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-10-02 12:21:34,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 12:21:34,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 12:21:34,289 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:34,289 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-10-02 12:21:34,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:34,563 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 12:21:34,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 12:21:34,563 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-10-02 12:21:34,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:34,564 INFO L225 Difference]: With dead ends: 31 [2018-10-02 12:21:34,564 INFO L226 Difference]: Without dead ends: 30 [2018-10-02 12:21:34,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime [2018-10-02 12:21:34,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-02 12:21:34,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-02 12:21:34,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 12:21:34,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-02 12:21:34,570 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-10-02 12:21:34,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:34,570 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-02 12:21:34,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 12:21:34,571 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-02 12:21:34,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-02 12:21:34,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:34,571 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-10-02 12:21:34,572 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:34,572 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:34,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-10-02 12:21:34,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:34,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:34,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:34,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:34,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:34,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:34,865 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 [2018-10-02 12:21:34,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:34,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:35,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:35,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-02 12:21:35,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 12:21:35,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 12:21:35,236 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:35,236 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-10-02 12:21:35,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:35,550 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 12:21:35,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 12:21:35,551 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-10-02 12:21:35,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:35,551 INFO L225 Difference]: With dead ends: 33 [2018-10-02 12:21:35,552 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 12:21:35,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime [2018-10-02 12:21:35,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 12:21:35,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-02 12:21:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 12:21:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-02 12:21:35,558 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-10-02 12:21:35,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:35,558 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-02 12:21:35,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 12:21:35,558 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-02 12:21:35,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-02 12:21:35,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:35,559 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-10-02 12:21:35,559 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:35,559 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:35,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-10-02 12:21:35,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:35,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:35,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:35,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:35,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:35,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:35,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:21:35,836 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:21:35,849 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:21:35,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:35,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:36,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:36,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-10-02 12:21:36,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 12:21:36,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 12:21:36,123 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:36,123 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-10-02 12:21:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:36,358 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 12:21:36,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 12:21:36,359 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-10-02 12:21:36,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:36,360 INFO L225 Difference]: With dead ends: 35 [2018-10-02 12:21:36,360 INFO L226 Difference]: Without dead ends: 34 [2018-10-02 12:21:36,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime [2018-10-02 12:21:36,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-02 12:21:36,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-02 12:21:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 12:21:36,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-02 12:21:36,366 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-10-02 12:21:36,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:36,366 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-02 12:21:36,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 12:21:36,367 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-02 12:21:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-02 12:21:36,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:36,367 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-10-02 12:21:36,368 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:36,368 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:36,368 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-10-02 12:21:36,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:36,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:36,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:36,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:36,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:36,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:36,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:21:36,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:21:36,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-02 12:21:36,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:36,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:37,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:37,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-10-02 12:21:37,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 12:21:37,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 12:21:37,612 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:37,612 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-10-02 12:21:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:37,861 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 12:21:37,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 12:21:37,862 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-10-02 12:21:37,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:37,863 INFO L225 Difference]: With dead ends: 37 [2018-10-02 12:21:37,863 INFO L226 Difference]: Without dead ends: 36 [2018-10-02 12:21:37,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime [2018-10-02 12:21:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-02 12:21:37,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-02 12:21:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-02 12:21:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-02 12:21:37,869 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-10-02 12:21:37,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:37,870 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-02 12:21:37,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 12:21:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-02 12:21:37,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-02 12:21:37,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:37,871 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-10-02 12:21:37,871 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:37,871 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:37,872 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-10-02 12:21:37,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:37,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:37,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:37,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:37,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:38,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:38,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:21:38,180 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:21:38,190 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:21:38,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:38,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:38,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:38,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-02 12:21:38,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 12:21:38,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 12:21:38,485 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:38,485 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-10-02 12:21:38,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:38,832 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 12:21:38,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 12:21:38,833 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-10-02 12:21:38,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:38,834 INFO L225 Difference]: With dead ends: 39 [2018-10-02 12:21:38,834 INFO L226 Difference]: Without dead ends: 38 [2018-10-02 12:21:38,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime [2018-10-02 12:21:38,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-02 12:21:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-02 12:21:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-02 12:21:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-02 12:21:38,839 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-10-02 12:21:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:38,840 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-02 12:21:38,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 12:21:38,840 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-02 12:21:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-02 12:21:38,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:38,841 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-10-02 12:21:38,841 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:38,841 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:38,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-10-02 12:21:38,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:38,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:38,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:38,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:38,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:39,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:39,112 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 [2018-10-02 12:21:39,123 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:21:39,190 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-02 12:21:39,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:39,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:39,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:39,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-10-02 12:21:39,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 12:21:39,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 12:21:39,446 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:39,446 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-10-02 12:21:39,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:39,759 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 12:21:39,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 12:21:39,760 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-10-02 12:21:39,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:39,760 INFO L225 Difference]: With dead ends: 41 [2018-10-02 12:21:39,761 INFO L226 Difference]: Without dead ends: 40 [2018-10-02 12:21:39,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime [2018-10-02 12:21:39,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-02 12:21:39,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-02 12:21:39,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-02 12:21:39,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-02 12:21:39,769 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-10-02 12:21:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:39,770 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-02 12:21:39,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 12:21:39,770 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-02 12:21:39,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-02 12:21:39,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:39,771 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-10-02 12:21:39,771 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:39,771 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:39,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-10-02 12:21:39,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:39,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:39,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:39,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:39,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:40,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:40,350 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 [2018-10-02 12:21:40,358 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:21:40,389 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 12:21:40,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:40,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:40,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:40,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-10-02 12:21:40,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 12:21:40,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 12:21:40,760 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:40,760 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-10-02 12:21:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:41,045 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-02 12:21:41,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 12:21:41,046 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-10-02 12:21:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:41,047 INFO L225 Difference]: With dead ends: 43 [2018-10-02 12:21:41,047 INFO L226 Difference]: Without dead ends: 42 [2018-10-02 12:21:41,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime [2018-10-02 12:21:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-02 12:21:41,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-02 12:21:41,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-02 12:21:41,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-02 12:21:41,052 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-10-02 12:21:41,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:41,052 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-02 12:21:41,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 12:21:41,053 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-02 12:21:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-02 12:21:41,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:41,053 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-10-02 12:21:41,053 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:41,054 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:41,054 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-10-02 12:21:41,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:41,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:41,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:41,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:41,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:41,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:41,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:21:41,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:41,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:41,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:41,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-02 12:21:41,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 12:21:41,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 12:21:41,662 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:41,662 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-10-02 12:21:41,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:41,990 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-02 12:21:41,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 12:21:41,990 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-10-02 12:21:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:41,991 INFO L225 Difference]: With dead ends: 45 [2018-10-02 12:21:41,991 INFO L226 Difference]: Without dead ends: 44 [2018-10-02 12:21:41,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime [2018-10-02 12:21:41,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-02 12:21:41,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-02 12:21:41,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-02 12:21:41,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-02 12:21:41,997 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-10-02 12:21:41,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:41,997 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-02 12:21:41,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 12:21:41,997 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-02 12:21:41,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-02 12:21:41,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:41,998 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-10-02 12:21:41,998 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:41,999 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:41,999 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-10-02 12:21:41,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:41,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:42,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:42,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:42,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:42,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:42,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:21:42,612 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:21:42,626 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:21:42,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:42,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:43,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:43,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-10-02 12:21:43,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 12:21:43,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 12:21:43,074 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:43,075 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-10-02 12:21:43,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:43,443 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-02 12:21:43,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 12:21:43,443 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-10-02 12:21:43,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:43,444 INFO L225 Difference]: With dead ends: 47 [2018-10-02 12:21:43,444 INFO L226 Difference]: Without dead ends: 46 [2018-10-02 12:21:43,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime [2018-10-02 12:21:43,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-02 12:21:43,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-02 12:21:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-02 12:21:43,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-02 12:21:43,451 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-10-02 12:21:43,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:43,452 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-02 12:21:43,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 12:21:43,452 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-02 12:21:43,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-02 12:21:43,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:43,453 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-10-02 12:21:43,453 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:43,453 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:43,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-10-02 12:21:43,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:43,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:43,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:43,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:43,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:44,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:44,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:21:44,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:21:44,436 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-02 12:21:44,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:44,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:45,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:45,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-10-02 12:21:45,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 12:21:45,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 12:21:45,752 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:45,752 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-10-02 12:21:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:46,083 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-02 12:21:46,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 12:21:46,085 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-10-02 12:21:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:46,086 INFO L225 Difference]: With dead ends: 49 [2018-10-02 12:21:46,086 INFO L226 Difference]: Without dead ends: 48 [2018-10-02 12:21:46,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.6s impTime [2018-10-02 12:21:46,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-02 12:21:46,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-02 12:21:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-02 12:21:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-02 12:21:46,091 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-10-02 12:21:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:46,092 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-02 12:21:46,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 12:21:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-02 12:21:46,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-02 12:21:46,093 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:46,093 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-10-02 12:21:46,093 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:46,094 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:46,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-10-02 12:21:46,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:46,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:46,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:46,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:46,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:46,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:46,412 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 [2018-10-02 12:21:46,420 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:21:46,434 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:21:46,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:46,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:47,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:47,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-02 12:21:47,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 12:21:47,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 12:21:47,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:47,773 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-10-02 12:21:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:48,138 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-02 12:21:48,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 12:21:48,138 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-10-02 12:21:48,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:48,139 INFO L225 Difference]: With dead ends: 51 [2018-10-02 12:21:48,139 INFO L226 Difference]: Without dead ends: 50 [2018-10-02 12:21:48,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.0s impTime [2018-10-02 12:21:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-02 12:21:48,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-02 12:21:48,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-02 12:21:48,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-02 12:21:48,145 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-10-02 12:21:48,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:48,145 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-02 12:21:48,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 12:21:48,145 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-02 12:21:48,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-02 12:21:48,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:48,146 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-10-02 12:21:48,146 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:48,146 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:48,147 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-10-02 12:21:48,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:48,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:48,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:48,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:48,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:48,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:48,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:21:48,493 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:21:48,514 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-02 12:21:48,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:48,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:49,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:49,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-02 12:21:49,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 12:21:49,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 12:21:49,555 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:49,555 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-10-02 12:21:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:49,862 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-02 12:21:49,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 12:21:49,863 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-10-02 12:21:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:49,863 INFO L225 Difference]: With dead ends: 53 [2018-10-02 12:21:49,863 INFO L226 Difference]: Without dead ends: 52 [2018-10-02 12:21:49,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime [2018-10-02 12:21:49,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-02 12:21:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-02 12:21:49,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-02 12:21:49,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-02 12:21:49,868 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-10-02 12:21:49,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:49,868 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-02 12:21:49,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 12:21:49,868 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-02 12:21:49,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-02 12:21:49,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:49,869 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-10-02 12:21:49,869 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:49,869 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:49,870 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-10-02 12:21:49,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:49,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:49,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:49,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:49,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:50,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:50,393 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 [2018-10-02 12:21:50,408 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:21:50,430 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 12:21:50,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:50,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:50,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:50,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-10-02 12:21:50,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 12:21:50,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 12:21:50,820 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:50,820 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-10-02 12:21:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:51,137 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-02 12:21:51,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 12:21:51,137 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-10-02 12:21:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:51,138 INFO L225 Difference]: With dead ends: 55 [2018-10-02 12:21:51,138 INFO L226 Difference]: Without dead ends: 54 [2018-10-02 12:21:51,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime [2018-10-02 12:21:51,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-02 12:21:51,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-02 12:21:51,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-02 12:21:51,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-02 12:21:51,143 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-10-02 12:21:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:51,143 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-02 12:21:51,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 12:21:51,143 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-02 12:21:51,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-02 12:21:51,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:51,144 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-10-02 12:21:51,144 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:51,144 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:51,144 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-10-02 12:21:51,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:51,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:51,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:51,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:51,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:51,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:51,555 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 [2018-10-02 12:21:51,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:51,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:52,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:52,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-02 12:21:52,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 12:21:52,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 12:21:52,082 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:52,083 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-10-02 12:21:52,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:52,416 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-02 12:21:52,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 12:21:52,417 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-10-02 12:21:52,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:52,417 INFO L225 Difference]: With dead ends: 57 [2018-10-02 12:21:52,418 INFO L226 Difference]: Without dead ends: 56 [2018-10-02 12:21:52,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime [2018-10-02 12:21:52,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-02 12:21:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-02 12:21:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-02 12:21:52,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-02 12:21:52,423 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-10-02 12:21:52,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:52,423 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-02 12:21:52,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 12:21:52,423 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-02 12:21:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-02 12:21:52,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:52,424 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-10-02 12:21:52,424 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:52,424 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:52,425 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-10-02 12:21:52,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:52,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:52,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:52,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:52,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:53,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:53,160 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 [2018-10-02 12:21:53,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:21:53,186 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:21:53,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:53,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:53,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:53,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-10-02 12:21:53,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 12:21:53,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 12:21:53,723 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:53,724 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-10-02 12:21:54,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:54,172 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-02 12:21:54,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 12:21:54,172 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-10-02 12:21:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:54,173 INFO L225 Difference]: With dead ends: 59 [2018-10-02 12:21:54,173 INFO L226 Difference]: Without dead ends: 58 [2018-10-02 12:21:54,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime [2018-10-02 12:21:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-02 12:21:54,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-02 12:21:54,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-02 12:21:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-02 12:21:54,178 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-10-02 12:21:54,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:54,178 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-02 12:21:54,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 12:21:54,178 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-02 12:21:54,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-02 12:21:54,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:54,179 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-10-02 12:21:54,179 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:54,179 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:54,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-10-02 12:21:54,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:54,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:54,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:54,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:54,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:54,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:54,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:21:54,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:21:55,006 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-02 12:21:55,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:55,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:55,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:55,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-10-02 12:21:55,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 12:21:55,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 12:21:55,532 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:55,532 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-10-02 12:21:55,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:55,886 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-02 12:21:55,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 12:21:55,886 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-10-02 12:21:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:55,887 INFO L225 Difference]: With dead ends: 61 [2018-10-02 12:21:55,887 INFO L226 Difference]: Without dead ends: 60 [2018-10-02 12:21:55,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime [2018-10-02 12:21:55,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-02 12:21:55,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-02 12:21:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-02 12:21:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-02 12:21:55,891 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-10-02 12:21:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:55,892 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-02 12:21:55,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 12:21:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-02 12:21:55,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-02 12:21:55,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:55,893 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-10-02 12:21:55,893 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:55,893 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:55,894 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-10-02 12:21:55,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:55,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:55,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:55,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:55,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:56,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:56,369 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 [2018-10-02 12:21:56,384 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:21:56,399 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:21:56,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:56,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:57,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:57,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-02 12:21:57,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 12:21:57,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 12:21:57,523 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:57,523 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-10-02 12:21:58,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:58,259 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-02 12:21:58,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 12:21:58,260 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-10-02 12:21:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:58,261 INFO L225 Difference]: With dead ends: 63 [2018-10-02 12:21:58,261 INFO L226 Difference]: Without dead ends: 62 [2018-10-02 12:21:58,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime [2018-10-02 12:21:58,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-02 12:21:58,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-02 12:21:58,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-02 12:21:58,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-02 12:21:58,265 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-10-02 12:21:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:58,265 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-02 12:21:58,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 12:21:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-02 12:21:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-02 12:21:58,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:58,266 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-10-02 12:21:58,266 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:58,266 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:58,267 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-10-02 12:21:58,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:58,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:58,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:58,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:58,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:58,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:58,667 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 [2018-10-02 12:21:58,675 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:21:58,700 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-02 12:21:58,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:58,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:59,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:59,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-10-02 12:21:59,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 12:21:59,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 12:21:59,294 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:59,294 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-10-02 12:21:59,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:59,821 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-02 12:21:59,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 12:21:59,822 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-10-02 12:21:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:59,823 INFO L225 Difference]: With dead ends: 65 [2018-10-02 12:21:59,823 INFO L226 Difference]: Without dead ends: 64 [2018-10-02 12:21:59,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime [2018-10-02 12:21:59,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-02 12:21:59,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-02 12:21:59,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-02 12:21:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-02 12:21:59,827 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-10-02 12:21:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:59,828 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-02 12:21:59,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 12:21:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-02 12:21:59,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-02 12:21:59,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:59,828 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-10-02 12:21:59,829 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:59,829 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:59,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-10-02 12:21:59,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:59,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:59,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:59,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:59,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:00,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:00,436 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 [2018-10-02 12:22:00,445 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:22:00,474 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-02 12:22:00,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:00,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:01,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:01,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-10-02 12:22:01,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 12:22:01,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 12:22:01,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:01,064 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-10-02 12:22:01,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:01,474 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-02 12:22:01,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 12:22:01,475 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-10-02 12:22:01,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:01,476 INFO L225 Difference]: With dead ends: 67 [2018-10-02 12:22:01,476 INFO L226 Difference]: Without dead ends: 66 [2018-10-02 12:22:01,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime [2018-10-02 12:22:01,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-02 12:22:01,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-02 12:22:01,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-02 12:22:01,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-02 12:22:01,480 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-10-02 12:22:01,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:01,480 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-02 12:22:01,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 12:22:01,481 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-02 12:22:01,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-02 12:22:01,481 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:01,481 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-10-02 12:22:01,481 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:01,481 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:01,481 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-10-02 12:22:01,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:01,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:01,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:01,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:01,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:02,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:02,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:22:02,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:22:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:02,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:02,906 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:02,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:02,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-02 12:22:02,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 12:22:02,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 12:22:02,927 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:02,927 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-10-02 12:22:03,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:03,434 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-02 12:22:03,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 12:22:03,435 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-10-02 12:22:03,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:03,436 INFO L225 Difference]: With dead ends: 69 [2018-10-02 12:22:03,436 INFO L226 Difference]: Without dead ends: 68 [2018-10-02 12:22:03,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime [2018-10-02 12:22:03,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-02 12:22:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-02 12:22:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-02 12:22:03,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-02 12:22:03,439 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-10-02 12:22:03,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:03,440 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-02 12:22:03,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 12:22:03,440 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-02 12:22:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-02 12:22:03,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:03,441 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-10-02 12:22:03,441 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:03,441 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:03,441 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-10-02 12:22:03,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:03,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:03,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:03,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:22:03,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:04,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:04,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:22:04,181 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:22:04,200 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:22:04,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:04,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:04,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:04,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-10-02 12:22:04,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 12:22:04,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 12:22:04,938 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:04,938 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-10-02 12:22:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:05,399 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-02 12:22:05,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 12:22:05,399 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-10-02 12:22:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:05,400 INFO L225 Difference]: With dead ends: 71 [2018-10-02 12:22:05,400 INFO L226 Difference]: Without dead ends: 70 [2018-10-02 12:22:05,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime [2018-10-02 12:22:05,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-02 12:22:05,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-02 12:22:05,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-02 12:22:05,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-02 12:22:05,404 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-10-02 12:22:05,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:05,404 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-02 12:22:05,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 12:22:05,405 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-02 12:22:05,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-02 12:22:05,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:05,405 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-10-02 12:22:05,405 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:05,406 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:05,406 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-10-02 12:22:05,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:05,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:05,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:05,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:05,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:06,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:06,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:22:06,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:22:06,198 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-02 12:22:06,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:06,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:06,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:06,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-10-02 12:22:06,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 12:22:06,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 12:22:06,985 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:06,985 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-10-02 12:22:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:07,511 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-02 12:22:07,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 12:22:07,512 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-10-02 12:22:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:07,513 INFO L225 Difference]: With dead ends: 73 [2018-10-02 12:22:07,513 INFO L226 Difference]: Without dead ends: 72 [2018-10-02 12:22:07,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime [2018-10-02 12:22:07,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-02 12:22:07,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-02 12:22:07,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-02 12:22:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-02 12:22:07,516 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-10-02 12:22:07,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:07,516 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-02 12:22:07,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 12:22:07,517 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-02 12:22:07,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-02 12:22:07,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:07,517 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-10-02 12:22:07,517 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:07,517 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:07,517 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-10-02 12:22:07,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:07,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:07,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:07,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:07,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:08,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:08,205 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 [2018-10-02 12:22:08,212 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:22:08,233 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:22:08,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:08,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:08,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:08,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-02 12:22:08,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 12:22:08,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 12:22:08,784 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:08,784 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-10-02 12:22:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:09,216 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-02 12:22:09,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 12:22:09,217 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-10-02 12:22:09,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:09,218 INFO L225 Difference]: With dead ends: 75 [2018-10-02 12:22:09,218 INFO L226 Difference]: Without dead ends: 74 [2018-10-02 12:22:09,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime [2018-10-02 12:22:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-02 12:22:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-02 12:22:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-02 12:22:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-02 12:22:09,222 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-10-02 12:22:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:09,222 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-02 12:22:09,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 12:22:09,223 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-02 12:22:09,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-02 12:22:09,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:09,223 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-10-02 12:22:09,223 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:09,224 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:09,224 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-10-02 12:22:09,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:09,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:09,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:09,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:09,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:09,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:09,944 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 [2018-10-02 12:22:09,951 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:22:09,986 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-02 12:22:09,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:09,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:10,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:10,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-10-02 12:22:10,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 12:22:10,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 12:22:10,791 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:10,792 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-10-02 12:22:11,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:11,640 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-02 12:22:11,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 12:22:11,641 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-10-02 12:22:11,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:11,642 INFO L225 Difference]: With dead ends: 77 [2018-10-02 12:22:11,642 INFO L226 Difference]: Without dead ends: 76 [2018-10-02 12:22:11,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime [2018-10-02 12:22:11,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-02 12:22:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-02 12:22:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-02 12:22:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-02 12:22:11,646 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-10-02 12:22:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:11,646 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-02 12:22:11,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 12:22:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-02 12:22:11,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-02 12:22:11,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:11,647 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-10-02 12:22:11,647 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:11,647 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:11,647 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-10-02 12:22:11,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:11,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:11,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:11,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:11,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:12,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:12,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:22:12,547 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:22:12,586 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-02 12:22:12,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:12,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:13,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:13,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-10-02 12:22:13,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 12:22:13,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 12:22:13,398 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:13,398 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-10-02 12:22:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:13,856 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-02 12:22:13,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 12:22:13,857 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-10-02 12:22:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:13,858 INFO L225 Difference]: With dead ends: 79 [2018-10-02 12:22:13,858 INFO L226 Difference]: Without dead ends: 78 [2018-10-02 12:22:13,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.2s impTime [2018-10-02 12:22:13,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-02 12:22:13,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-02 12:22:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-02 12:22:13,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-02 12:22:13,862 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-10-02 12:22:13,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:13,862 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-02 12:22:13,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 12:22:13,862 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-02 12:22:13,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-02 12:22:13,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:13,863 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-10-02 12:22:13,863 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:13,863 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:13,863 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-10-02 12:22:13,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:13,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:13,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:13,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:13,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:15,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:15,110 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 [2018-10-02 12:22:15,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:22:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:15,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:16,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:16,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-02 12:22:16,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 12:22:16,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 12:22:16,059 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:16,060 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-10-02 12:22:16,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:16,686 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-02 12:22:16,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 12:22:16,686 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-10-02 12:22:16,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:16,687 INFO L225 Difference]: With dead ends: 81 [2018-10-02 12:22:16,687 INFO L226 Difference]: Without dead ends: 80 [2018-10-02 12:22:16,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.6s impTime [2018-10-02 12:22:16,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-02 12:22:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-02 12:22:16,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-02 12:22:16,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-02 12:22:16,690 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-10-02 12:22:16,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:16,690 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-02 12:22:16,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 12:22:16,690 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-02 12:22:16,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-02 12:22:16,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:16,691 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-10-02 12:22:16,691 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:16,691 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:16,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-10-02 12:22:16,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:16,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:16,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:16,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:22:16,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:17,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:17,591 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 [2018-10-02 12:22:17,598 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:22:17,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:22:17,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:17,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:18,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:18,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-10-02 12:22:18,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 12:22:18,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 12:22:18,805 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:18,805 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-10-02 12:22:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:19,382 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-02 12:22:19,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 12:22:19,382 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-10-02 12:22:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:19,383 INFO L225 Difference]: With dead ends: 83 [2018-10-02 12:22:19,383 INFO L226 Difference]: Without dead ends: 82 [2018-10-02 12:22:19,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.7s impTime [2018-10-02 12:22:19,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-02 12:22:19,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-02 12:22:19,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-02 12:22:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-02 12:22:19,388 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-10-02 12:22:19,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:19,389 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-02 12:22:19,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 12:22:19,389 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-02 12:22:19,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-02 12:22:19,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:19,390 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-10-02 12:22:19,390 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:19,390 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:19,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-10-02 12:22:19,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:19,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:19,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:19,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:19,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:20,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:20,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:22:20,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:22:20,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-02 12:22:20,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:20,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:21,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:21,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-10-02 12:22:21,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 12:22:21,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 12:22:21,557 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:21,558 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-10-02 12:22:22,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:22,146 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-02 12:22:22,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 12:22:22,147 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-10-02 12:22:22,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:22,148 INFO L225 Difference]: With dead ends: 85 [2018-10-02 12:22:22,148 INFO L226 Difference]: Without dead ends: 84 [2018-10-02 12:22:22,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.7s impTime [2018-10-02 12:22:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-02 12:22:22,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-02 12:22:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-02 12:22:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-02 12:22:22,152 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-10-02 12:22:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:22,152 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-02 12:22:22,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 12:22:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-02 12:22:22,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-02 12:22:22,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:22,153 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-10-02 12:22:22,153 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:22,153 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:22,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-10-02 12:22:22,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:22,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:22,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:22,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:22,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:23,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:23,073 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 [2018-10-02 12:22:23,083 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:22:23,107 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:22:23,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:23,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:24,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:24,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-02 12:22:24,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-02 12:22:24,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-02 12:22:24,337 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:24,337 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-10-02 12:22:24,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:24,981 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-02 12:22:24,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 12:22:24,982 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-10-02 12:22:24,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:24,983 INFO L225 Difference]: With dead ends: 87 [2018-10-02 12:22:24,983 INFO L226 Difference]: Without dead ends: 86 [2018-10-02 12:22:24,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.7s impTime [2018-10-02 12:22:24,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-02 12:22:24,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-02 12:22:24,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-02 12:22:24,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-02 12:22:24,987 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-10-02 12:22:24,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:24,988 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-02 12:22:24,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-02 12:22:24,988 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-02 12:22:24,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-02 12:22:24,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:24,989 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-10-02 12:22:24,989 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:24,989 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:24,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-10-02 12:22:24,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:24,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:24,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:24,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:24,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:25,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:25,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:22:25,593 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:22:25,635 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-02 12:22:25,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:25,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:26,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:26,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-10-02 12:22:26,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 12:22:26,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 12:22:26,404 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:26,404 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-10-02 12:22:26,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:26,938 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-02 12:22:26,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 12:22:26,938 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-10-02 12:22:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:26,939 INFO L225 Difference]: With dead ends: 89 [2018-10-02 12:22:26,939 INFO L226 Difference]: Without dead ends: 88 [2018-10-02 12:22:26,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime [2018-10-02 12:22:26,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-02 12:22:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-02 12:22:26,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-02 12:22:26,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-02 12:22:26,944 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-10-02 12:22:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:26,944 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-02 12:22:26,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 12:22:26,944 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-02 12:22:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-02 12:22:26,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:26,945 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-10-02 12:22:26,945 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:26,945 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:26,945 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-10-02 12:22:26,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:26,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:26,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:26,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:26,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:27,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:27,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:22:27,832 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:22:27,873 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-02 12:22:27,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:27,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:29,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:29,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-10-02 12:22:29,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-02 12:22:29,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-02 12:22:29,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:29,237 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-10-02 12:22:29,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:29,818 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-02 12:22:29,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 12:22:29,818 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-10-02 12:22:29,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:29,819 INFO L225 Difference]: With dead ends: 91 [2018-10-02 12:22:29,819 INFO L226 Difference]: Without dead ends: 90 [2018-10-02 12:22:29,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.7s impTime [2018-10-02 12:22:29,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-02 12:22:29,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-02 12:22:29,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-02 12:22:29,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-02 12:22:29,823 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-10-02 12:22:29,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:29,823 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-02 12:22:29,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-02 12:22:29,823 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-02 12:22:29,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-02 12:22:29,824 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:29,824 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-10-02 12:22:29,824 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:29,824 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:29,824 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-10-02 12:22:29,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:29,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:29,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:29,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:29,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:31,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:31,857 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 [2018-10-02 12:22:31,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:22:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:31,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:33,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:33,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-02 12:22:33,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 12:22:33,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 12:22:33,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:33,064 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-10-02 12:22:33,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:33,746 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-02 12:22:33,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 12:22:33,746 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-10-02 12:22:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:33,747 INFO L225 Difference]: With dead ends: 93 [2018-10-02 12:22:33,747 INFO L226 Difference]: Without dead ends: 92 [2018-10-02 12:22:33,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.5s impTime [2018-10-02 12:22:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-02 12:22:33,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-02 12:22:33,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-02 12:22:33,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-02 12:22:33,750 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-10-02 12:22:33,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:33,750 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-02 12:22:33,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-02 12:22:33,751 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-02 12:22:33,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-02 12:22:33,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:33,751 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-10-02 12:22:33,751 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:33,752 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:33,752 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-10-02 12:22:33,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:33,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:33,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:33,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:22:33,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:34,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:34,518 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 [2018-10-02 12:22:34,526 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:22:34,554 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:22:34,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:34,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:35,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:35,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-10-02 12:22:35,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-02 12:22:35,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-02 12:22:35,706 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:35,706 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-10-02 12:22:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:36,323 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-02 12:22:36,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 12:22:36,323 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-10-02 12:22:36,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:36,324 INFO L225 Difference]: With dead ends: 95 [2018-10-02 12:22:36,324 INFO L226 Difference]: Without dead ends: 94 [2018-10-02 12:22:36,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.5s impTime [2018-10-02 12:22:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-02 12:22:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-02 12:22:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-02 12:22:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-02 12:22:36,328 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-10-02 12:22:36,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:36,329 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-02 12:22:36,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-02 12:22:36,329 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-02 12:22:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-02 12:22:36,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:36,330 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-10-02 12:22:36,330 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:36,330 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:36,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-10-02 12:22:36,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:36,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:36,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:36,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:36,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:37,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:37,565 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 [2018-10-02 12:22:37,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:22:37,681 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-02 12:22:37,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:37,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:38,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:38,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-10-02 12:22:38,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-02 12:22:38,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-02 12:22:38,857 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:38,858 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-10-02 12:22:39,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:39,481 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-02 12:22:39,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 12:22:39,482 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-10-02 12:22:39,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:39,483 INFO L225 Difference]: With dead ends: 97 [2018-10-02 12:22:39,483 INFO L226 Difference]: Without dead ends: 96 [2018-10-02 12:22:39,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.9s impTime [2018-10-02 12:22:39,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-02 12:22:39,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-02 12:22:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-02 12:22:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-02 12:22:39,486 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-10-02 12:22:39,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:39,486 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-02 12:22:39,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-02 12:22:39,486 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-02 12:22:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-02 12:22:39,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:39,487 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-10-02 12:22:39,487 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:39,487 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:39,487 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-10-02 12:22:39,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:39,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:39,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:39,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:39,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:40,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:40,244 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 [2018-10-02 12:22:40,251 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:22:40,278 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:22:40,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:40,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:41,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:41,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-10-02 12:22:41,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-02 12:22:41,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-02 12:22:41,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:41,158 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-10-02 12:22:41,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:41,786 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-02 12:22:41,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 12:22:41,786 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-10-02 12:22:41,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:41,787 INFO L225 Difference]: With dead ends: 99 [2018-10-02 12:22:41,787 INFO L226 Difference]: Without dead ends: 98 [2018-10-02 12:22:41,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime [2018-10-02 12:22:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-02 12:22:41,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-02 12:22:41,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-02 12:22:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-02 12:22:41,792 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-10-02 12:22:41,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:41,793 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-02 12:22:41,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-02 12:22:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-02 12:22:41,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-02 12:22:41,794 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:41,794 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-10-02 12:22:41,794 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:41,794 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:41,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-10-02 12:22:41,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:41,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:41,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:41,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:41,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:42,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:42,553 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 [2018-10-02 12:22:42,560 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:22:42,607 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-02 12:22:42,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:42,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:43,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:43,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-02 12:22:43,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-02 12:22:43,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-02 12:22:43,652 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:43,652 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-10-02 12:22:44,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:44,393 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-02 12:22:44,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 12:22:44,394 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-10-02 12:22:44,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:44,394 INFO L225 Difference]: With dead ends: 101 [2018-10-02 12:22:44,395 INFO L226 Difference]: Without dead ends: 100 [2018-10-02 12:22:44,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime [2018-10-02 12:22:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-02 12:22:44,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-02 12:22:44,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-02 12:22:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-02 12:22:44,399 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-10-02 12:22:44,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:44,399 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-02 12:22:44,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-02 12:22:44,399 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-02 12:22:44,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-02 12:22:44,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:44,400 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-10-02 12:22:44,400 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:44,400 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:44,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-10-02 12:22:44,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:44,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:44,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:44,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:44,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:45,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:45,783 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 [2018-10-02 12:22:45,790 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:22:45,838 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-02 12:22:45,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:45,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:46,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:46,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-10-02 12:22:46,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-02 12:22:46,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-02 12:22:46,844 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:46,844 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-10-02 12:22:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:47,394 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-02 12:22:47,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 12:22:47,394 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-10-02 12:22:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:47,396 INFO L225 Difference]: With dead ends: 103 [2018-10-02 12:22:47,396 INFO L226 Difference]: Without dead ends: 102 [2018-10-02 12:22:47,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime [2018-10-02 12:22:47,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-02 12:22:47,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-02 12:22:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-02 12:22:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-02 12:22:47,400 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-10-02 12:22:47,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:47,401 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-02 12:22:47,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-02 12:22:47,401 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-02 12:22:47,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-02 12:22:47,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:47,402 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-10-02 12:22:47,402 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:47,402 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:47,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-10-02 12:22:47,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:47,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:47,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:47,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:47,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:48,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:48,815 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 [2018-10-02 12:22:48,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:22:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:48,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:51,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:51,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-02 12:22:51,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-02 12:22:51,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-02 12:22:51,138 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:51,138 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-10-02 12:22:51,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:51,744 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-02 12:22:51,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 12:22:51,744 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-10-02 12:22:51,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:51,745 INFO L225 Difference]: With dead ends: 105 [2018-10-02 12:22:51,745 INFO L226 Difference]: Without dead ends: 104 [2018-10-02 12:22:51,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time 2.8s impTime [2018-10-02 12:22:51,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-02 12:22:51,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-02 12:22:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-02 12:22:51,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-02 12:22:51,750 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-10-02 12:22:51,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:51,750 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-02 12:22:51,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-02 12:22:51,750 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-02 12:22:51,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-02 12:22:51,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:51,751 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-10-02 12:22:51,751 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:51,752 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:51,752 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-10-02 12:22:51,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:51,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:51,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:51,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:22:51,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:53,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:53,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:22:53,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:22:53,318 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:22:53,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:53,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:22:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:55,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:22:55,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-10-02 12:22:55,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-02 12:22:55,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-02 12:22:55,558 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:22:55,558 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-10-02 12:22:57,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:22:57,012 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-02 12:22:57,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 12:22:57,013 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-10-02 12:22:57,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:22:57,014 INFO L225 Difference]: With dead ends: 107 [2018-10-02 12:22:57,014 INFO L226 Difference]: Without dead ends: 106 [2018-10-02 12:22:57,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 2.8s impTime [2018-10-02 12:22:57,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-02 12:22:57,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-02 12:22:57,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-02 12:22:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-02 12:22:57,018 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-10-02 12:22:57,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:22:57,019 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-02 12:22:57,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-02 12:22:57,019 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-02 12:22:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-02 12:22:57,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:22:57,020 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-10-02 12:22:57,020 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:22:57,020 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:22:57,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-10-02 12:22:57,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:22:57,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:22:57,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:57,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:22:57,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:22:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:22:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:22:58,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:22:58,914 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 [2018-10-02 12:22:58,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:22:58,973 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-02 12:22:58,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:22:58,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:23:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:00,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:23:00,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-10-02 12:23:00,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-02 12:23:00,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-02 12:23:00,351 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:23:00,352 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-10-02 12:23:01,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:23:01,090 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-02 12:23:01,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 12:23:01,091 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-10-02 12:23:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:23:01,092 INFO L225 Difference]: With dead ends: 109 [2018-10-02 12:23:01,092 INFO L226 Difference]: Without dead ends: 108 [2018-10-02 12:23:01,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.5s impTime [2018-10-02 12:23:01,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-02 12:23:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-02 12:23:01,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-02 12:23:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-02 12:23:01,097 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-10-02 12:23:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:23:01,098 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-02 12:23:01,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-02 12:23:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-02 12:23:01,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-02 12:23:01,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:23:01,098 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-10-02 12:23:01,099 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:23:01,099 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:23:01,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-10-02 12:23:01,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:23:01,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:23:01,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:01,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:23:01,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:23:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:02,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:23:02,785 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 [2018-10-02 12:23:02,800 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:23:02,849 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:23:02,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:23:02,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:23:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:04,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:23:04,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-02 12:23:04,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-02 12:23:04,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-02 12:23:04,732 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:23:04,732 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-10-02 12:23:05,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:23:05,663 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-02 12:23:05,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 12:23:05,664 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-10-02 12:23:05,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:23:05,665 INFO L225 Difference]: With dead ends: 111 [2018-10-02 12:23:05,665 INFO L226 Difference]: Without dead ends: 110 [2018-10-02 12:23:05,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 2.9s impTime [2018-10-02 12:23:05,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-02 12:23:05,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-02 12:23:05,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-02 12:23:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-02 12:23:05,668 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-10-02 12:23:05,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:23:05,669 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-02 12:23:05,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-02 12:23:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-02 12:23:05,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-02 12:23:05,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:23:05,670 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-10-02 12:23:05,670 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:23:05,670 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:23:05,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-10-02 12:23:05,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:23:05,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:23:05,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:05,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:23:05,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:23:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:06,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:23:06,765 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 [2018-10-02 12:23:06,781 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:23:06,893 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-02 12:23:06,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:23:06,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:23:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:08,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:23:08,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-10-02 12:23:08,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-02 12:23:08,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-02 12:23:08,451 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:23:08,452 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-10-02 12:23:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:23:09,079 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-02 12:23:09,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 12:23:09,079 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-10-02 12:23:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:23:09,081 INFO L225 Difference]: With dead ends: 113 [2018-10-02 12:23:09,081 INFO L226 Difference]: Without dead ends: 112 [2018-10-02 12:23:09,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.1s impTime [2018-10-02 12:23:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-02 12:23:09,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-02 12:23:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-02 12:23:09,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-02 12:23:09,084 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-10-02 12:23:09,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:23:09,084 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-02 12:23:09,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-02 12:23:09,084 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-02 12:23:09,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-02 12:23:09,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:23:09,085 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-10-02 12:23:09,085 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:23:09,085 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:23:09,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-10-02 12:23:09,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:23:09,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:23:09,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:09,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:23:09,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:23:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:11,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:23:11,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:23:11,016 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:23:11,069 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-02 12:23:11,069 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:23:11,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:23:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:12,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:23:12,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-10-02 12:23:12,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-02 12:23:12,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-02 12:23:12,696 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:23:12,696 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-10-02 12:23:13,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:23:13,602 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-02 12:23:13,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 12:23:13,603 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-10-02 12:23:13,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:23:13,603 INFO L225 Difference]: With dead ends: 115 [2018-10-02 12:23:13,604 INFO L226 Difference]: Without dead ends: 114 [2018-10-02 12:23:13,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 2.8s impTime [2018-10-02 12:23:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-02 12:23:13,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-02 12:23:13,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-02 12:23:13,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-02 12:23:13,608 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-10-02 12:23:13,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:23:13,609 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-02 12:23:13,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-02 12:23:13,609 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-02 12:23:13,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-02 12:23:13,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:23:13,610 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-10-02 12:23:13,610 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:23:13,610 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:23:13,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-10-02 12:23:13,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:23:13,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:23:13,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:13,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:23:13,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:23:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:15,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:23:15,229 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 [2018-10-02 12:23:15,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:23:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:23:15,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:23:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:16,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:23:16,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-02 12:23:16,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-02 12:23:16,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-02 12:23:16,881 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:23:16,881 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-10-02 12:23:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:23:17,852 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-02 12:23:17,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 12:23:17,852 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-10-02 12:23:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:23:17,853 INFO L225 Difference]: With dead ends: 117 [2018-10-02 12:23:17,853 INFO L226 Difference]: Without dead ends: 116 [2018-10-02 12:23:17,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.7s impTime [2018-10-02 12:23:17,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-02 12:23:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-02 12:23:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-02 12:23:17,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-02 12:23:17,857 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-10-02 12:23:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:23:17,857 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-02 12:23:17,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-02 12:23:17,858 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-02 12:23:17,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-02 12:23:17,858 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:23:17,858 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-10-02 12:23:17,859 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:23:17,859 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:23:17,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-10-02 12:23:17,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:23:17,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:23:17,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:17,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:23:17,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:23:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:19,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:23:19,203 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 [2018-10-02 12:23:19,210 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:23:19,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:23:19,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:23:19,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:23:20,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:20,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:23:20,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-10-02 12:23:20,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-02 12:23:20,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-02 12:23:20,954 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:23:20,954 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-10-02 12:23:21,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:23:21,862 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-02 12:23:21,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 12:23:21,863 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-10-02 12:23:21,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:23:21,863 INFO L225 Difference]: With dead ends: 119 [2018-10-02 12:23:21,864 INFO L226 Difference]: Without dead ends: 118 [2018-10-02 12:23:21,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.5s impTime [2018-10-02 12:23:21,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-02 12:23:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-02 12:23:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-02 12:23:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-02 12:23:21,868 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-10-02 12:23:21,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:23:21,869 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-02 12:23:21,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-02 12:23:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-02 12:23:21,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-02 12:23:21,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:23:21,870 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-10-02 12:23:21,870 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:23:21,870 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:23:21,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-10-02 12:23:21,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:23:21,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:23:21,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:21,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:23:21,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:23:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:23,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:23:23,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:23:23,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:23:23,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-02 12:23:23,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:23:23,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:23:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:25,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:23:25,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-10-02 12:23:25,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-02 12:23:25,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-02 12:23:25,540 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:23:25,540 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-10-02 12:23:26,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:23:26,289 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-02 12:23:26,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 12:23:26,289 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-10-02 12:23:26,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:23:26,290 INFO L225 Difference]: With dead ends: 121 [2018-10-02 12:23:26,290 INFO L226 Difference]: Without dead ends: 120 [2018-10-02 12:23:26,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 2.9s impTime [2018-10-02 12:23:26,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-02 12:23:26,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-02 12:23:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-02 12:23:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-02 12:23:26,294 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-10-02 12:23:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:23:26,294 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-02 12:23:26,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-02 12:23:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-02 12:23:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-02 12:23:26,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:23:26,295 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-10-02 12:23:26,295 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:23:26,295 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:23:26,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-10-02 12:23:26,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:23:26,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:23:26,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:26,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:23:26,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:23:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:27,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:23:27,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:23:27,345 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:23:27,378 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:23:27,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:23:27,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:23:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:28,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:23:28,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-02 12:23:28,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-02 12:23:28,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-02 12:23:28,705 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:23:28,706 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-10-02 12:23:29,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:23:29,396 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-02 12:23:29,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 12:23:29,396 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-10-02 12:23:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:23:29,397 INFO L225 Difference]: With dead ends: 123 [2018-10-02 12:23:29,397 INFO L226 Difference]: Without dead ends: 122 [2018-10-02 12:23:29,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime [2018-10-02 12:23:29,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-02 12:23:29,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-02 12:23:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-02 12:23:29,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-02 12:23:29,401 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-10-02 12:23:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:23:29,401 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-02 12:23:29,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-02 12:23:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-02 12:23:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-02 12:23:29,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:23:29,402 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-10-02 12:23:29,402 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:23:29,402 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:23:29,403 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-10-02 12:23:29,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:23:29,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:23:29,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:29,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:23:29,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:23:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:30,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:23:30,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:23:30,959 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:23:31,024 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-02 12:23:31,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:23:31,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:23:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:33,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:23:33,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-10-02 12:23:33,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-02 12:23:33,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-02 12:23:33,016 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:23:33,016 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-10-02 12:23:34,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:23:34,056 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-02 12:23:34,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 12:23:34,057 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-10-02 12:23:34,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:23:34,057 INFO L225 Difference]: With dead ends: 125 [2018-10-02 12:23:34,058 INFO L226 Difference]: Without dead ends: 124 [2018-10-02 12:23:34,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 2.9s impTime [2018-10-02 12:23:34,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-02 12:23:34,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-02 12:23:34,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-02 12:23:34,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-02 12:23:34,062 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-10-02 12:23:34,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:23:34,063 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-02 12:23:34,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-02 12:23:34,063 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-02 12:23:34,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-02 12:23:34,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:23:34,064 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-10-02 12:23:34,064 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:23:34,064 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:23:34,064 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-10-02 12:23:34,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:23:34,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:23:34,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:34,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:23:34,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:23:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:35,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:23:35,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:23:35,415 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:23:35,477 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-02 12:23:35,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:23:35,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:23:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:37,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:23:37,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-10-02 12:23:37,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-02 12:23:37,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-02 12:23:37,234 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:23:37,234 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-10-02 12:23:38,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:23:38,174 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-02 12:23:38,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 12:23:38,174 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-10-02 12:23:38,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:23:38,175 INFO L225 Difference]: With dead ends: 127 [2018-10-02 12:23:38,175 INFO L226 Difference]: Without dead ends: 126 [2018-10-02 12:23:38,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.5s impTime [2018-10-02 12:23:38,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-02 12:23:38,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-02 12:23:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-02 12:23:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-02 12:23:38,179 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-10-02 12:23:38,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:23:38,179 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-02 12:23:38,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-02 12:23:38,179 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-02 12:23:38,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-02 12:23:38,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:23:38,180 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-10-02 12:23:38,180 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:23:38,180 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:23:38,180 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-10-02 12:23:38,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:23:38,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:23:38,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:38,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:23:38,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:23:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:39,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:23:39,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:23:39,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:23:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:23:39,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:23:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:41,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:23:41,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-02 12:23:41,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-02 12:23:41,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-02 12:23:41,575 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:23:41,575 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-10-02 12:23:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:23:42,455 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-02 12:23:42,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 12:23:42,455 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-10-02 12:23:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:23:42,456 INFO L225 Difference]: With dead ends: 129 [2018-10-02 12:23:42,456 INFO L226 Difference]: Without dead ends: 128 [2018-10-02 12:23:42,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.8s impTime [2018-10-02 12:23:42,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-02 12:23:42,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-02 12:23:42,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-02 12:23:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-02 12:23:42,460 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-10-02 12:23:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:23:42,461 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-02 12:23:42,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-02 12:23:42,461 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-02 12:23:42,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-02 12:23:42,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:23:42,462 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-10-02 12:23:42,462 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:23:42,462 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:23:42,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-10-02 12:23:42,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:23:42,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:23:42,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:42,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:23:42,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:23:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:45,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:23:45,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:23:45,379 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:23:45,412 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:23:45,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:23:45,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:23:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:47,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:23:47,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-10-02 12:23:47,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-02 12:23:47,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-02 12:23:47,410 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:23:47,410 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-10-02 12:23:48,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:23:48,261 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-02 12:23:48,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 12:23:48,261 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-10-02 12:23:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:23:48,262 INFO L225 Difference]: With dead ends: 131 [2018-10-02 12:23:48,262 INFO L226 Difference]: Without dead ends: 130 [2018-10-02 12:23:48,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s Time 4.1s impTime [2018-10-02 12:23:48,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-02 12:23:48,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-02 12:23:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-02 12:23:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-10-02 12:23:48,265 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-10-02 12:23:48,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:23:48,266 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-10-02 12:23:48,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-02 12:23:48,266 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-10-02 12:23:48,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-02 12:23:48,267 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:23:48,267 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-10-02 12:23:48,267 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:23:48,267 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:23:48,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-10-02 12:23:48,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:23:48,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:23:48,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:48,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:23:48,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:23:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:50,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:23:50,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:23:50,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:23:50,419 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-02 12:23:50,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:23:50,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:23:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:52,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:23:52,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-10-02 12:23:52,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-02 12:23:52,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-02 12:23:52,505 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:23:52,505 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-10-02 12:23:53,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:23:53,390 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-02 12:23:53,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 12:23:53,390 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-10-02 12:23:53,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:23:53,391 INFO L225 Difference]: With dead ends: 133 [2018-10-02 12:23:53,391 INFO L226 Difference]: Without dead ends: 132 [2018-10-02 12:23:53,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time 3.5s impTime [2018-10-02 12:23:53,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-02 12:23:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-02 12:23:53,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-02 12:23:53,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-10-02 12:23:53,397 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-10-02 12:23:53,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:23:53,397 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-10-02 12:23:53,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-02 12:23:53,397 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-10-02 12:23:53,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-02 12:23:53,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:23:53,398 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-10-02 12:23:53,398 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:23:53,399 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:23:53,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-10-02 12:23:53,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:23:53,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:23:53,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:53,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:23:53,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:23:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:55,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:23:55,922 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 [2018-10-02 12:23:55,932 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:23:55,970 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:23:55,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:23:55,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:23:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:23:58,186 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:23:58,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-10-02 12:23:58,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-02 12:23:58,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-02 12:23:58,188 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:23:58,188 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-10-02 12:23:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:23:59,118 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-02 12:23:59,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 12:23:59,119 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-10-02 12:23:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:23:59,120 INFO L225 Difference]: With dead ends: 135 [2018-10-02 12:23:59,120 INFO L226 Difference]: Without dead ends: 134 [2018-10-02 12:23:59,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time 4.0s impTime [2018-10-02 12:23:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-02 12:23:59,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-10-02 12:23:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-02 12:23:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-02 12:23:59,125 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-10-02 12:23:59,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:23:59,125 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-02 12:23:59,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-02 12:23:59,125 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-02 12:23:59,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-02 12:23:59,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:23:59,126 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-10-02 12:23:59,126 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:23:59,127 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:23:59,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-10-02 12:23:59,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:23:59,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:23:59,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:59,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:23:59,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:23:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:24:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:00,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:24:00,662 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 [2018-10-02 12:24:00,669 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:24:00,754 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-02 12:24:00,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:24:00,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:24:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:03,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:24:03,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-10-02 12:24:03,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-02 12:24:03,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-02 12:24:03,674 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:24:03,674 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-10-02 12:24:04,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:24:04,682 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-02 12:24:04,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 12:24:04,683 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-10-02 12:24:04,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:24:04,684 INFO L225 Difference]: With dead ends: 137 [2018-10-02 12:24:04,684 INFO L226 Difference]: Without dead ends: 136 [2018-10-02 12:24:04,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time 3.7s impTime [2018-10-02 12:24:04,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-02 12:24:04,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-02 12:24:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-02 12:24:04,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-02 12:24:04,689 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-10-02 12:24:04,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:24:04,689 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-02 12:24:04,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-02 12:24:04,689 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-02 12:24:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-02 12:24:04,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:24:04,690 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-10-02 12:24:04,690 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:24:04,690 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:24:04,690 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-10-02 12:24:04,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:24:04,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:24:04,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:04,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:24:04,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:24:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:07,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:24:07,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:24:07,140 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:24:07,212 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-02 12:24:07,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:24:07,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:24:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:09,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:24:09,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-10-02 12:24:09,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-10-02 12:24:09,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-10-02 12:24:09,622 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:24:09,622 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-10-02 12:24:10,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:24:10,690 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-02 12:24:10,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 12:24:10,690 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-10-02 12:24:10,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:24:10,691 INFO L225 Difference]: With dead ends: 139 [2018-10-02 12:24:10,691 INFO L226 Difference]: Without dead ends: 138 [2018-10-02 12:24:10,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s Time 4.2s impTime [2018-10-02 12:24:10,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-02 12:24:10,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-02 12:24:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-02 12:24:10,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-02 12:24:10,694 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-10-02 12:24:10,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:24:10,694 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-02 12:24:10,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-10-02 12:24:10,694 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-02 12:24:10,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-02 12:24:10,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:24:10,695 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-10-02 12:24:10,695 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:24:10,695 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:24:10,695 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-10-02 12:24:10,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:24:10,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:24:10,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:10,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:24:10,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:24:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:12,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:24:12,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:24:12,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:24:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:24:12,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:24:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:14,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:24:14,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-10-02 12:24:14,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-02 12:24:14,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-02 12:24:14,219 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:24:14,219 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-10-02 12:24:15,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:24:15,169 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-02 12:24:15,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 12:24:15,169 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-10-02 12:24:15,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:24:15,170 INFO L225 Difference]: With dead ends: 141 [2018-10-02 12:24:15,170 INFO L226 Difference]: Without dead ends: 140 [2018-10-02 12:24:15,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.9s impTime [2018-10-02 12:24:15,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-02 12:24:15,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-02 12:24:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-02 12:24:15,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-02 12:24:15,174 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-10-02 12:24:15,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:24:15,175 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-02 12:24:15,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-02 12:24:15,175 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-02 12:24:15,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-02 12:24:15,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:24:15,176 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-10-02 12:24:15,176 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:24:15,176 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:24:15,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-10-02 12:24:15,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:24:15,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:24:15,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:15,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:24:15,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:24:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:17,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:24:17,289 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 [2018-10-02 12:24:17,296 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:24:17,331 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:24:17,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:24:17,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:24:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:19,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:24:19,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-10-02 12:24:19,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-02 12:24:19,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-02 12:24:19,810 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:24:19,810 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-10-02 12:24:20,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:24:20,699 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-02 12:24:20,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 12:24:20,699 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-10-02 12:24:20,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:24:20,700 INFO L225 Difference]: With dead ends: 143 [2018-10-02 12:24:20,701 INFO L226 Difference]: Without dead ends: 142 [2018-10-02 12:24:20,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 4.0s impTime [2018-10-02 12:24:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-02 12:24:20,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-02 12:24:20,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-02 12:24:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-10-02 12:24:20,705 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-10-02 12:24:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:24:20,706 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-10-02 12:24:20,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-02 12:24:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-10-02 12:24:20,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-02 12:24:20,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:24:20,707 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-10-02 12:24:20,707 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:24:20,707 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:24:20,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-10-02 12:24:20,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:24:20,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:24:20,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:20,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:24:20,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:24:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:22,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:24:22,723 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 [2018-10-02 12:24:22,730 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:24:22,808 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-02 12:24:22,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:24:22,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:24:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:25,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:24:25,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-10-02 12:24:25,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-02 12:24:25,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-02 12:24:25,279 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:24:25,279 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-10-02 12:24:26,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:24:26,391 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-02 12:24:26,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 12:24:26,392 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-10-02 12:24:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:24:26,392 INFO L225 Difference]: With dead ends: 145 [2018-10-02 12:24:26,392 INFO L226 Difference]: Without dead ends: 144 [2018-10-02 12:24:26,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time 3.9s impTime [2018-10-02 12:24:26,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-02 12:24:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-02 12:24:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-02 12:24:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-10-02 12:24:26,397 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-10-02 12:24:26,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:24:26,398 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-10-02 12:24:26,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-02 12:24:26,398 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-10-02 12:24:26,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-02 12:24:26,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:24:26,398 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-10-02 12:24:26,399 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:24:26,399 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:24:26,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-10-02 12:24:26,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:24:26,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:24:26,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:26,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:24:26,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:24:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:27,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:24:27,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:24:27,992 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:24:28,030 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:24:28,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:24:28,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:24:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:29,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:24:29,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-10-02 12:24:29,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-02 12:24:29,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-02 12:24:29,717 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:24:29,717 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-10-02 12:24:30,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:24:30,640 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-02 12:24:30,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 12:24:30,641 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-10-02 12:24:30,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:24:30,641 INFO L225 Difference]: With dead ends: 147 [2018-10-02 12:24:30,642 INFO L226 Difference]: Without dead ends: 146 [2018-10-02 12:24:30,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.6s impTime [2018-10-02 12:24:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-02 12:24:30,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-02 12:24:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-02 12:24:30,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-02 12:24:30,646 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-10-02 12:24:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:24:30,646 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-02 12:24:30,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-02 12:24:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-02 12:24:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-02 12:24:30,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:24:30,647 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-10-02 12:24:30,647 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:24:30,647 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:24:30,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-10-02 12:24:30,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:24:30,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:24:30,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:30,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:24:30,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:24:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:32,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:24:32,284 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 [2018-10-02 12:24:32,291 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:24:32,484 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-02 12:24:32,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:24:32,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:24:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:35,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:24:35,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-10-02 12:24:35,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-02 12:24:35,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-02 12:24:35,287 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:24:35,287 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-10-02 12:24:36,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:24:36,327 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-02 12:24:36,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-02 12:24:36,328 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-10-02 12:24:36,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:24:36,328 INFO L225 Difference]: With dead ends: 149 [2018-10-02 12:24:36,329 INFO L226 Difference]: Without dead ends: 148 [2018-10-02 12:24:36,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time 3.7s impTime [2018-10-02 12:24:36,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-02 12:24:36,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-02 12:24:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-02 12:24:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-02 12:24:36,333 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-10-02 12:24:36,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:24:36,334 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-02 12:24:36,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-02 12:24:36,334 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-02 12:24:36,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-02 12:24:36,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:24:36,335 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-10-02 12:24:36,335 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:24:36,335 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:24:36,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-10-02 12:24:36,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:24:36,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:24:36,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:36,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:24:36,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:24:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:38,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:24:38,163 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 [2018-10-02 12:24:38,170 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:24:38,257 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-02 12:24:38,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:24:38,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:24:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:40,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:24:40,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-10-02 12:24:40,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-10-02 12:24:40,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-10-02 12:24:40,129 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:24:40,129 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-10-02 12:24:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:24:41,045 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-02 12:24:41,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 12:24:41,045 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-10-02 12:24:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:24:41,046 INFO L225 Difference]: With dead ends: 151 [2018-10-02 12:24:41,046 INFO L226 Difference]: Without dead ends: 150 [2018-10-02 12:24:41,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time 3.0s impTime [2018-10-02 12:24:41,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-02 12:24:41,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-02 12:24:41,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-02 12:24:41,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-10-02 12:24:41,052 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-10-02 12:24:41,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:24:41,052 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-10-02 12:24:41,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-10-02 12:24:41,052 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-10-02 12:24:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-02 12:24:41,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:24:41,053 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-10-02 12:24:41,053 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:24:41,053 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:24:41,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-10-02 12:24:41,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:24:41,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:24:41,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:41,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:24:41,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:24:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:43,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:24:43,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:24:43,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:24:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:24:43,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:24:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:46,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:24:46,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-10-02 12:24:46,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-02 12:24:46,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-02 12:24:46,820 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:24:46,820 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-10-02 12:24:48,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:24:48,018 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-02 12:24:48,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-02 12:24:48,018 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-10-02 12:24:48,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:24:48,019 INFO L225 Difference]: With dead ends: 153 [2018-10-02 12:24:48,019 INFO L226 Difference]: Without dead ends: 152 [2018-10-02 12:24:48,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s Time 5.0s impTime [2018-10-02 12:24:48,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-02 12:24:48,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-10-02 12:24:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-02 12:24:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-02 12:24:48,024 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-10-02 12:24:48,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:24:48,024 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-02 12:24:48,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-02 12:24:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-02 12:24:48,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-02 12:24:48,025 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:24:48,025 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-10-02 12:24:48,025 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:24:48,025 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:24:48,026 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-10-02 12:24:48,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:24:48,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:24:48,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:48,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:24:48,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:24:50,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:50,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:24:50,504 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 [2018-10-02 12:24:50,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:24:50,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:24:50,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:24:50,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:24:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:53,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:24:53,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-10-02 12:24:53,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-10-02 12:24:53,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-10-02 12:24:53,366 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:24:53,366 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-10-02 12:24:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:24:54,414 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-02 12:24:54,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 12:24:54,415 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-10-02 12:24:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:24:54,415 INFO L225 Difference]: With dead ends: 155 [2018-10-02 12:24:54,416 INFO L226 Difference]: Without dead ends: 154 [2018-10-02 12:24:54,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s Time 4.6s impTime [2018-10-02 12:24:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-02 12:24:54,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-02 12:24:54,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-02 12:24:54,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-10-02 12:24:54,420 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-10-02 12:24:54,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:24:54,420 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-10-02 12:24:54,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-10-02 12:24:54,420 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-10-02 12:24:54,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-02 12:24:54,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:24:54,421 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-10-02 12:24:54,421 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:24:54,421 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:24:54,421 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-10-02 12:24:54,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:24:54,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:24:54,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:54,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:24:54,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:24:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:56,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:24:56,682 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 [2018-10-02 12:24:56,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:24:56,775 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-02 12:24:56,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:24:56,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:24:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:24:58,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:24:58,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-10-02 12:24:58,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-02 12:24:58,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-02 12:24:58,943 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:24:58,943 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-10-02 12:24:59,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:24:59,904 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-02 12:24:59,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-02 12:24:59,904 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-10-02 12:24:59,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:24:59,905 INFO L225 Difference]: With dead ends: 157 [2018-10-02 12:24:59,905 INFO L226 Difference]: Without dead ends: 156 [2018-10-02 12:24:59,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time 3.8s impTime [2018-10-02 12:24:59,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-02 12:24:59,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-02 12:24:59,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-02 12:24:59,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-10-02 12:24:59,909 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-10-02 12:24:59,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:24:59,909 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-10-02 12:24:59,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-02 12:24:59,909 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-10-02 12:24:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-02 12:24:59,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:24:59,910 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-10-02 12:24:59,910 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:24:59,910 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:24:59,910 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-10-02 12:24:59,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:24:59,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:24:59,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:59,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:24:59,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:24:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:25:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:25:02,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:25:02,119 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 [2018-10-02 12:25:02,125 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:25:02,168 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:25:02,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:25:02,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:25:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:25:04,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:25:04,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-10-02 12:25:04,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-10-02 12:25:04,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-10-02 12:25:04,646 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:25:04,646 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-10-02 12:25:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:25:05,713 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-02 12:25:05,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-02 12:25:05,713 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-10-02 12:25:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:25:05,714 INFO L225 Difference]: With dead ends: 159 [2018-10-02 12:25:05,714 INFO L226 Difference]: Without dead ends: 158 [2018-10-02 12:25:05,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time 4.1s impTime [2018-10-02 12:25:05,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-02 12:25:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-02 12:25:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-02 12:25:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-02 12:25:05,718 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-10-02 12:25:05,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:25:05,718 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-02 12:25:05,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-10-02 12:25:05,718 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-02 12:25:05,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-02 12:25:05,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:25:05,719 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-10-02 12:25:05,719 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:25:05,719 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:25:05,719 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-10-02 12:25:05,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:25:05,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:25:05,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:25:05,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:25:05,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:25:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:25:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:25:08,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:25:08,384 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 [2018-10-02 12:25:08,393 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:25:08,497 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-02 12:25:08,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:25:08,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:25:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:25:11,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:25:11,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-10-02 12:25:11,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-02 12:25:11,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-02 12:25:11,662 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:25:11,662 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-10-02 12:25:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:25:12,958 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-02 12:25:12,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-02 12:25:12,959 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-10-02 12:25:12,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:25:12,959 INFO L225 Difference]: With dead ends: 161 [2018-10-02 12:25:12,959 INFO L226 Difference]: Without dead ends: 160 [2018-10-02 12:25:12,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s Time 5.2s impTime [2018-10-02 12:25:12,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-02 12:25:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-02 12:25:12,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-02 12:25:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-02 12:25:12,964 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-10-02 12:25:12,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:25:12,965 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-02 12:25:12,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-02 12:25:12,965 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-02 12:25:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-02 12:25:12,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:25:12,966 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-10-02 12:25:12,966 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:25:12,966 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:25:12,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-10-02 12:25:12,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:25:12,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:25:12,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:25:12,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:25:12,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:25:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:25:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:25:16,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:25:16,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:25:16,091 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:25:16,195 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-02 12:25:16,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:25:16,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:25:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:25:19,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:25:19,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-10-02 12:25:19,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-10-02 12:25:19,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-10-02 12:25:19,364 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:25:19,364 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-10-02 12:25:20,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:25:20,626 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-02 12:25:20,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-02 12:25:20,626 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-10-02 12:25:20,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:25:20,627 INFO L225 Difference]: With dead ends: 163 [2018-10-02 12:25:20,627 INFO L226 Difference]: Without dead ends: 162 [2018-10-02 12:25:20,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s Time 5.6s impTime [2018-10-02 12:25:20,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-02 12:25:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-02 12:25:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-02 12:25:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-10-02 12:25:20,631 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-10-02 12:25:20,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:25:20,631 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-10-02 12:25:20,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-10-02 12:25:20,632 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-10-02 12:25:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-02 12:25:20,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:25:20,632 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-10-02 12:25:20,633 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:25:20,633 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:25:20,633 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-10-02 12:25:20,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:25:20,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:25:20,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:25:20,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:25:20,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:25:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:25:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:25:23,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:25:23,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:25:23,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:25:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:25:23,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-02 12:25:24,749 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-02 12:25:24,950 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:25:24,950 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 12:25:24,956 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 12:25:24,956 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 12:25:24 BoogieIcfgContainer [2018-10-02 12:25:24,956 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 12:25:24,957 INFO L168 Benchmark]: Toolchain (without parser) took 239309.43 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -113.8 MB). Free memory was 1.5 GB in the beginning and 978.1 MB in the end (delta: 477.6 MB). Peak memory consumption was 363.9 MB. Max. memory is 7.1 GB. [2018-10-02 12:25:24,959 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:25:24,959 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:25:24,960 INFO L168 Benchmark]: Boogie Preprocessor took 24.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:25:24,960 INFO L168 Benchmark]: RCFGBuilder took 269.08 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 12:25:24,961 INFO L168 Benchmark]: TraceAbstraction took 238968.04 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -113.8 MB). Free memory was 1.4 GB in the beginning and 978.1 MB in the end (delta: 456.5 MB). Peak memory consumption was 342.7 MB. Max. memory is 7.1 GB. [2018-10-02 12:25:24,964 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 269.08 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 238968.04 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -113.8 MB). Free memory was 1.4 GB in the beginning and 978.1 MB in the end (delta: 456.5 MB). Peak memory consumption was 342.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 162 with TraceHistMax 80, 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, 6 locations, 1 error locations. TIMEOUT Result, 238.9s OverallTime, 80 OverallIterations, 80 TraceHistogramMax, 49.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 160 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13041 SolverSat, 226 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9478 GetRequests, 3159 SyntacticMatches, 0 SemanticMatches, 6319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 172.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=79, 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, 79 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 177.1s InterpolantComputationTime, 12795 NumberOfCodeBlocks, 12795 NumberOfCodeBlocksAsserted, 1769 NumberOfCheckSat, 12638 ConstructedInterpolants, 0 QuantifiedInterpolants, 8039012 SizeOfPredicates, 0 NumberOfNonLiveVariables, 12948 ConjunctsInSsa, 3315 ConjunctsInUnsatCore, 157 InterpolantComputations, 1 PerfectInterpolantSequences, 0/328640 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/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_12-25-24-975.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_12-25-24-975.csv Completed graceful shutdown