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/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:38:36,318 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:38:36,320 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:38:36,334 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:38:36,334 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:38:36,335 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:38:36,337 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:38:36,338 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:38:36,340 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:38:36,341 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:38:36,342 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-28 10:38:36,374 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-28 10:38:36,395 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:38:36,395 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:38:36,396 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:38:36,398 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:38:36,398 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:38:36,399 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:38:36,399 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:38:36,399 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:38:36,399 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:38:36,400 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:38:36,401 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:38:36,401 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:38:36,401 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:38:36,401 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:38:36,401 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:38:36,402 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:38:36,402 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:38:36,402 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:38:36,402 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:38:36,403 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:38:36,404 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:38:36,404 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:38:36,404 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:38:36,404 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:38:36,404 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:38:36,405 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:38:36,405 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:38:36,405 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:38:36,405 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:38:36,405 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:38:36,406 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-28 10:38:36,449 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:38:36,462 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:38:36,470 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:38:36,471 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:38:36,472 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:38:36,472 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-09-28 10:38:36,473 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl' [2018-09-28 10:38:36,520 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:38:36,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:38:36,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:38:36,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:38:36,525 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:38:36,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:36" (1/1) ... [2018-09-28 10:38:36,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:36" (1/1) ... [2018-09-28 10:38:36,562 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-28 10:38:36,562 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-28 10:38:36,563 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-28 10:38:36,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:38:36,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:38:36,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:38:36,566 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:38:36,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:36" (1/1) ... [2018-09-28 10:38:36,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:36" (1/1) ... [2018-09-28 10:38:36,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:36" (1/1) ... [2018-09-28 10:38:36,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:36" (1/1) ... [2018-09-28 10:38:36,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:36" (1/1) ... [2018-09-28 10:38:36,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:36" (1/1) ... [2018-09-28 10:38:36,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:36" (1/1) ... [2018-09-28 10:38:36,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:38:36,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:38:36,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:38:36,590 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:38:36,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:38:36,663 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-28 10:38:36,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-28 10:38:36,663 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-28 10:38:36,852 INFO L350 CfgBuilder]: Using library mode [2018-09-28 10:38:36,852 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:38:36 BoogieIcfgContainer [2018-09-28 10:38:36,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:38:36,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:38:36,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:38:36,857 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:38:36,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:36" (1/2) ... [2018-09-28 10:38:36,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d72e6b and model type DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:38:36, skipping insertion in model container [2018-09-28 10:38:36,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:38:36" (2/2) ... [2018-09-28 10:38:36,860 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-09-28 10:38:36,869 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:38:36,878 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:38:36,929 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:38:36,930 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:38:36,931 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:38:36,931 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:38:36,931 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:38:36,931 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:38:36,931 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:38:36,931 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:38:36,932 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:38:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-28 10:38:36,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-28 10:38:36,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:36,954 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-28 10:38:36,955 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:36,963 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:36,963 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-28 10:38:36,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:36,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:37,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:37,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:37,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:37,155 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:38:37,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-28 10:38:37,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:38:37,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:38:37,171 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:37,173 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-28 10:38:37,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:37,402 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:38:37,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:38:37,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-28 10:38:37,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:37,416 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:38:37,416 INFO L226 Difference]: Without dead ends: 4 [2018-09-28 10:38:37,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:37,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-28 10:38:37,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-28 10:38:37,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-28 10:38:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-28 10:38:37,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-28 10:38:37,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:37,454 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-28 10:38:37,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:38:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-28 10:38:37,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-28 10:38:37,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:37,455 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-28 10:38:37,456 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:37,456 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:37,456 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-28 10:38:37,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:37,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:37,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:37,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:37,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:37,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:37,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:37,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:37,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:37,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:37,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-28 10:38:37,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:38:37,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:38:37,850 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:37,850 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 6 states. [2018-09-28 10:38:38,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:38,109 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-28 10:38:38,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:38:38,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-09-28 10:38:38,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:38,113 INFO L225 Difference]: With dead ends: 6 [2018-09-28 10:38:38,114 INFO L226 Difference]: Without dead ends: 5 [2018-09-28 10:38:38,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:38,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-28 10:38:38,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-28 10:38:38,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-28 10:38:38,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-28 10:38:38,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-28 10:38:38,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:38,122 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-28 10:38:38,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:38:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-28 10:38:38,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 10:38:38,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:38,123 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-28 10:38:38,124 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:38,124 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:38,125 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-28 10:38:38,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:38,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:38,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:38,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:38,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:38,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:38,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:38,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:38:38,323 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:38:38,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:38,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:38,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:38,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-28 10:38:38,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:38:38,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:38:38,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:38,573 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 8 states. [2018-09-28 10:38:38,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:38,918 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-28 10:38:38,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:38:38,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-09-28 10:38:38,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:38,920 INFO L225 Difference]: With dead ends: 7 [2018-09-28 10:38:38,920 INFO L226 Difference]: Without dead ends: 6 [2018-09-28 10:38:38,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:38,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-28 10:38:38,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-28 10:38:38,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-28 10:38:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-28 10:38:38,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-28 10:38:38,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:38,925 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-28 10:38:38,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:38:38,925 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-28 10:38:38,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:38:38,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:38,926 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-28 10:38:38,926 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:38,927 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:38,927 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-28 10:38:38,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:38,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:38,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:38,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:38,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:39,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:39,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:39,036 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:38:39,056 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 10:38:39,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:39,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:39,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:39,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-28 10:38:39,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:38:39,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:38:39,181 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:39,181 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2018-09-28 10:38:39,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:39,721 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-28 10:38:39,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:38:39,721 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-09-28 10:38:39,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:39,722 INFO L225 Difference]: With dead ends: 8 [2018-09-28 10:38:39,723 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:38:39,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:39,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:38:39,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:38:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:38:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-28 10:38:39,727 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-28 10:38:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:39,727 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-28 10:38:39,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:38:39,728 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-28 10:38:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:38:39,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:39,729 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-28 10:38:39,729 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:39,730 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:39,730 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-28 10:38:39,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:39,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:39,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:39,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:39,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:39,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:39,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:39,872 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:38:39,886 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:38:39,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:39,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:40,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:40,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-28 10:38:40,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:38:40,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:38:40,034 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:40,034 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 12 states. [2018-09-28 10:38:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:40,372 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:38:40,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:38:40,373 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-09-28 10:38:40,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:40,374 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:38:40,374 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:38:40,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:38:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:38:40,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:38:40,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-28 10:38:40,379 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-28 10:38:40,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:40,380 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-28 10:38:40,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:38:40,380 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-28 10:38:40,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:38:40,381 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:40,381 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-28 10:38:40,382 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:40,382 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:40,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-28 10:38:40,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:40,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:40,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:40,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:40,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:40,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:40,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:40,522 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:38:40,530 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-28 10:38:40,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:40,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:40,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:40,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-28 10:38:40,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:38:40,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:38:40,852 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:40,852 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 14 states. [2018-09-28 10:38:41,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:41,252 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-28 10:38:41,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:38:41,253 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2018-09-28 10:38:41,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:41,254 INFO L225 Difference]: With dead ends: 10 [2018-09-28 10:38:41,254 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:38:41,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:41,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:38:41,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:38:41,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:38:41,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-28 10:38:41,259 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-28 10:38:41,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:41,259 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-28 10:38:41,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:38:41,260 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-28 10:38:41,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:38:41,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:41,260 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-28 10:38:41,261 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:41,261 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:41,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-28 10:38:41,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:41,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:41,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:41,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:41,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:41,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:41,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:41,428 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:38:41,437 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-28 10:38:41,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:41,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:41,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:41,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-28 10:38:41,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:38:41,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:38:41,619 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:41,619 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2018-09-28 10:38:42,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:42,028 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:38:42,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:38:42,029 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2018-09-28 10:38:42,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:42,030 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:38:42,030 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:38:42,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:42,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:38:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 10:38:42,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:38:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-28 10:38:42,035 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-28 10:38:42,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:42,035 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-28 10:38:42,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:38:42,035 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-28 10:38:42,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:38:42,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:42,036 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-28 10:38:42,036 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:42,036 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:42,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-28 10:38:42,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:42,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:42,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:42,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:42,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:42,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:42,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:42,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:42,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:42,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:42,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-28 10:38:42,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:38:42,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:38:42,456 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:42,456 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 18 states. [2018-09-28 10:38:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:43,036 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-28 10:38:43,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:38:43,036 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 9 [2018-09-28 10:38:43,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:43,037 INFO L225 Difference]: With dead ends: 12 [2018-09-28 10:38:43,037 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:38:43,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:38:43,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:38:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:38:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-28 10:38:43,042 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-28 10:38:43,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:43,042 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-28 10:38:43,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:38:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-28 10:38:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:38:43,043 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:43,043 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-28 10:38:43,043 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:43,044 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:43,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-28 10:38:43,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:43,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:43,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:43,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:43,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:43,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:43,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:43,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:38:43,248 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:38:43,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:43,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:43,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:43,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-28 10:38:43,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:38:43,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:38:43,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:43,679 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2018-09-28 10:38:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:44,312 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:38:44,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:38:44,313 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 10 [2018-09-28 10:38:44,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:44,314 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:38:44,315 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:38:44,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:38:44,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-28 10:38:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:38:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-28 10:38:44,318 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-28 10:38:44,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:44,318 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-28 10:38:44,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:38:44,319 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-28 10:38:44,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:38:44,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:44,319 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-28 10:38:44,319 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:44,319 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:44,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-28 10:38:44,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:44,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:44,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:44,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:44,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:44,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:44,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:44,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:38:44,584 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:38:44,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:44,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:44,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:44,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-28 10:38:44,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:38:44,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:38:44,852 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:44,852 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 22 states. [2018-09-28 10:38:45,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:45,607 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-28 10:38:45,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:38:45,607 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 11 [2018-09-28 10:38:45,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:45,608 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:38:45,608 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:38:45,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:45,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:38:45,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:38:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:38:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-28 10:38:45,611 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-28 10:38:45,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:45,612 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-28 10:38:45,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:38:45,612 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-28 10:38:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:38:45,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:45,613 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-28 10:38:45,613 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:45,613 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:45,613 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-28 10:38:45,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:45,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:45,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:45,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:45,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:45,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:45,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:45,958 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:38:45,988 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:38:45,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:45,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:46,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:46,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-28 10:38:46,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:38:46,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:38:46,422 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:46,422 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 24 states. [2018-09-28 10:38:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:47,226 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:38:47,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:38:47,226 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2018-09-28 10:38:47,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:47,227 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:38:47,227 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:38:47,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:38:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-28 10:38:47,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:38:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-28 10:38:47,232 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-28 10:38:47,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:47,232 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-28 10:38:47,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:38:47,233 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-28 10:38:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:38:47,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:47,233 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-28 10:38:47,233 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:47,233 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:47,234 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-28 10:38:47,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:47,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:47,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:47,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:47,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:47,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:47,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:47,427 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:38:47,439 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:38:47,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:47,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:48,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:48,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-28 10:38:48,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:38:48,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:38:48,071 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:48,071 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 26 states. [2018-09-28 10:38:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:49,372 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-28 10:38:49,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:38:49,373 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 13 [2018-09-28 10:38:49,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:49,374 INFO L225 Difference]: With dead ends: 16 [2018-09-28 10:38:49,374 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:38:49,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:49,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:38:49,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 10:38:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:38:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-28 10:38:49,378 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-28 10:38:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:49,378 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-28 10:38:49,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:38:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-28 10:38:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:38:49,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:49,379 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-28 10:38:49,379 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:49,379 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:49,380 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-28 10:38:49,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:49,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:49,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:49,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:49,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:49,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:49,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:49,848 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:38:49,901 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:38:49,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:49,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:50,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:50,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-28 10:38:50,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:38:50,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:38:50,525 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:50,525 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 28 states. [2018-09-28 10:38:51,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:51,946 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-28 10:38:51,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:38:51,947 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 14 [2018-09-28 10:38:51,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:51,948 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:38:51,948 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:38:51,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:38:51,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-28 10:38:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:38:51,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-28 10:38:51,952 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-28 10:38:51,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:51,953 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-28 10:38:51,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:38:51,953 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-28 10:38:51,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:38:51,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:51,954 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-28 10:38:51,954 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:51,954 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:51,954 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-28 10:38:51,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:51,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:51,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:51,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:51,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:52,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:52,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:52,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:52,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:52,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:52,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-28 10:38:52,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:38:52,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:38:52,885 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:52,885 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 30 states. [2018-09-28 10:38:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:54,491 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-28 10:38:54,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:38:54,491 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 15 [2018-09-28 10:38:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:54,492 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:38:54,492 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:38:54,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:54,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:38:54,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 10:38:54,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 10:38:54,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-28 10:38:54,498 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-28 10:38:54,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:54,499 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-28 10:38:54,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:38:54,499 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-28 10:38:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:38:54,499 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:54,499 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-28 10:38:54,500 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:54,500 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:54,500 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-28 10:38:54,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:54,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:54,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:54,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:54,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:55,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:55,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:55,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:38:55,303 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:38:55,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:55,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:56,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:56,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-28 10:38:56,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:38:56,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:38:56,248 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:56,248 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 32 states. [2018-09-28 10:38:57,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:57,608 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-28 10:38:57,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:38:57,608 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 16 [2018-09-28 10:38:57,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:57,609 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:38:57,609 INFO L226 Difference]: Without dead ends: 18 [2018-09-28 10:38:57,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-28 10:38:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-28 10:38:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:38:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-28 10:38:57,614 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-28 10:38:57,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:57,615 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-28 10:38:57,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:38:57,615 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-28 10:38:57,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:38:57,615 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:57,616 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-28 10:38:57,616 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:57,616 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:57,616 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-28 10:38:57,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:57,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:57,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:57,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:57,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:58,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:58,298 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) [2018-09-28 10:38:58,311 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:58,436 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:38:58,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:58,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:59,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:59,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-28 10:38:59,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:38:59,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:38:59,363 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:59,364 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 34 states. [2018-09-28 10:39:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:01,296 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-28 10:39:01,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:39:01,297 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 17 [2018-09-28 10:39:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:01,297 INFO L225 Difference]: With dead ends: 20 [2018-09-28 10:39:01,298 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:39:01,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:01,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:39:01,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:39:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:39:01,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-28 10:39:01,302 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-28 10:39:01,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:01,302 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-28 10:39:01,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:39:01,303 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-28 10:39:01,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:39:01,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:01,303 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-28 10:39:01,304 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:01,304 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:01,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-28 10:39:01,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:01,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:01,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:01,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:01,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:01,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:01,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:01,849 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:01,859 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:01,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:01,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:02,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:02,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-28 10:39:02,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:39:02,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:39:02,584 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:02,584 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 36 states. [2018-09-28 10:39:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:04,228 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-28 10:39:04,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:39:04,229 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 18 [2018-09-28 10:39:04,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:04,230 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:39:04,230 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:39:04,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:04,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:39:04,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-28 10:39:04,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:39:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-28 10:39:04,235 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-28 10:39:04,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:04,235 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-28 10:39:04,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:39:04,235 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-28 10:39:04,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:39:04,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:04,236 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-28 10:39:04,236 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:04,237 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:04,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-28 10:39:04,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:04,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:04,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:04,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:04,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:04,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:04,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:04,838 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:04,856 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-28 10:39:04,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:04,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:05,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:05,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-28 10:39:05,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:39:05,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:39:05,527 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:05,527 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 38 states. [2018-09-28 10:39:07,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:07,379 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-28 10:39:07,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:39:07,380 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 19 [2018-09-28 10:39:07,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:07,380 INFO L225 Difference]: With dead ends: 22 [2018-09-28 10:39:07,381 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:39:07,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:07,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:39:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 10:39:07,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 10:39:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-28 10:39:07,385 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-28 10:39:07,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:07,386 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-28 10:39:07,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:39:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-28 10:39:07,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:39:07,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:07,386 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-28 10:39:07,387 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:07,387 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:07,387 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-28 10:39:07,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:07,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:07,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:07,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:07,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:07,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:07,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:07,762 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:07,776 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-28 10:39:07,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:07,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:08,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:08,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-28 10:39:08,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:39:08,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:39:08,522 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:08,522 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 40 states. [2018-09-28 10:39:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:10,730 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-28 10:39:10,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:39:10,730 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 20 [2018-09-28 10:39:10,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:10,731 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:39:10,731 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:39:10,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:10,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:39:10,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-28 10:39:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:39:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-28 10:39:10,736 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-28 10:39:10,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:10,737 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-28 10:39:10,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:39:10,737 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-28 10:39:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 10:39:10,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:10,737 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-28 10:39:10,738 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:10,738 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:10,738 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-28 10:39:10,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:10,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:10,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:10,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:10,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:11,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:11,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:11,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:11,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:12,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:12,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-28 10:39:12,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:39:12,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:39:12,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:12,156 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 42 states. [2018-09-28 10:39:14,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:14,400 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-28 10:39:14,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:39:14,400 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 21 [2018-09-28 10:39:14,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:14,401 INFO L225 Difference]: With dead ends: 24 [2018-09-28 10:39:14,401 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:39:14,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:14,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:39:14,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:39:14,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:39:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-28 10:39:14,408 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-28 10:39:14,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:14,408 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-28 10:39:14,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:39:14,408 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-28 10:39:14,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:39:14,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:14,409 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-28 10:39:14,409 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:14,409 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:14,410 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-28 10:39:14,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:14,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:14,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:14,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:14,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:15,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:15,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:15,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:15,434 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:15,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:15,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:16,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:16,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-28 10:39:16,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:39:16,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:39:16,700 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:16,700 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 44 states. [2018-09-28 10:39:19,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:19,449 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-28 10:39:19,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:39:19,450 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 22 [2018-09-28 10:39:19,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:19,450 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:39:19,451 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:39:19,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:39:19,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-28 10:39:19,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:39:19,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-28 10:39:19,456 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-28 10:39:19,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:19,456 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-28 10:39:19,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:39:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-28 10:39:19,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-28 10:39:19,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:19,457 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-28 10:39:19,458 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:19,458 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:19,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-28 10:39:19,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:19,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:19,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:19,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:19,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:19,950 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:19,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:19,957 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:19,980 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-28 10:39:19,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:19,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:21,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:21,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-28 10:39:21,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:39:21,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:39:21,288 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:21,288 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 46 states. [2018-09-28 10:39:24,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:24,428 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-28 10:39:24,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:39:24,432 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 23 [2018-09-28 10:39:24,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:24,432 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:39:24,432 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:39:24,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:24,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:39:24,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:39:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:39:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-28 10:39:24,437 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-28 10:39:24,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:24,437 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-28 10:39:24,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:39:24,438 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-28 10:39:24,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:39:24,438 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:24,438 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-28 10:39:24,439 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:24,439 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:24,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-28 10:39:24,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:24,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:24,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:24,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:24,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:26,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:26,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:26,275 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:26,291 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:26,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:26,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:27,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:27,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-28 10:39:27,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:39:27,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:39:27,417 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:27,418 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 48 states. [2018-09-28 10:39:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:31,018 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-28 10:39:31,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:39:31,018 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 24 [2018-09-28 10:39:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:31,019 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:39:31,019 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:39:31,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:39:31,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-28 10:39:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:39:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-28 10:39:31,024 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-28 10:39:31,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:31,025 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-28 10:39:31,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:39:31,025 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-28 10:39:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 10:39:31,025 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:31,025 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-28 10:39:31,026 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:31,026 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:31,026 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-28 10:39:31,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:31,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:31,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:31,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:31,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:31,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:31,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:31,734 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:31,763 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-28 10:39:31,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:31,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:32,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:32,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-28 10:39:32,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:39:32,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:39:32,885 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:32,885 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 50 states. [2018-09-28 10:39:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:36,080 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-28 10:39:36,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:39:36,080 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 25 [2018-09-28 10:39:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:36,081 INFO L225 Difference]: With dead ends: 28 [2018-09-28 10:39:36,081 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:39:36,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:36,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:39:36,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 10:39:36,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:39:36,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-28 10:39:36,086 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-28 10:39:36,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:36,086 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-28 10:39:36,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:39:36,086 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-28 10:39:36,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:39:36,087 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:36,087 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-28 10:39:36,087 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:36,087 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:36,087 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-28 10:39:36,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:36,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:36,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:36,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:36,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:36,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:36,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:36,682 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:36,705 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:39:36,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:36,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:38,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:38,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-28 10:39:38,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:39:38,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:39:38,042 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:38,042 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 52 states. [2018-09-28 10:39:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:42,502 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-28 10:39:42,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:39:42,502 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 26 [2018-09-28 10:39:42,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:42,503 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:39:42,503 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:39:42,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:39:42,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-28 10:39:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:39:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-28 10:39:42,509 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-28 10:39:42,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:42,509 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-28 10:39:42,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:39:42,510 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-28 10:39:42,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-28 10:39:42,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:42,510 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-28 10:39:42,511 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:42,511 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:42,511 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-28 10:39:42,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:42,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:42,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:42,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:42,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:43,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:43,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:43,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:43,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:44,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:44,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-28 10:39:44,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:39:44,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:39:44,515 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:44,515 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 54 states. [2018-09-28 10:39:49,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:49,443 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-28 10:39:49,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:39:49,444 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 27 [2018-09-28 10:39:49,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:49,444 INFO L225 Difference]: With dead ends: 30 [2018-09-28 10:39:49,445 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:39:49,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:49,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:39:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:39:49,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:39:49,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-28 10:39:49,450 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-28 10:39:49,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:49,450 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-28 10:39:49,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:39:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-28 10:39:49,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:39:49,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:49,451 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-28 10:39:49,451 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:49,451 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:49,451 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-28 10:39:49,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:49,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:49,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:49,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:49,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:50,114 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:50,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:50,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:50,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:50,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:50,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:51,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:51,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-28 10:39:51,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:39:51,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:39:51,947 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:51,947 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 56 states. [2018-09-28 10:39:57,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:57,763 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-28 10:39:57,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:39:57,764 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 28 [2018-09-28 10:39:57,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:57,764 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:39:57,764 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 10:39:57,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:57,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 10:39:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-28 10:39:57,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:39:57,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-28 10:39:57,769 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-28 10:39:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:57,770 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-28 10:39:57,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:39:57,770 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-28 10:39:57,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 10:39:57,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:57,771 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-28 10:39:57,771 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:57,771 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:57,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-28 10:39:57,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:57,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:57,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:57,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:57,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:58,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:58,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:58,815 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:58,838 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-28 10:39:58,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:58,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:00,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:00,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-28 10:40:00,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:40:00,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:40:00,297 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:00,297 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 58 states. [2018-09-28 10:40:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:04,777 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-28 10:40:04,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:40:04,777 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 29 [2018-09-28 10:40:04,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:04,778 INFO L225 Difference]: With dead ends: 32 [2018-09-28 10:40:04,778 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:40:04,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:04,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:40:04,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:40:04,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:40:04,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-28 10:40:04,783 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-28 10:40:04,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:04,784 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-28 10:40:04,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:40:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-28 10:40:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:40:04,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:04,784 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-28 10:40:04,785 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:04,785 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:04,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-28 10:40:04,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:04,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:04,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:04,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:04,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:05,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:05,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:05,570 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:05,587 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:05,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:05,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:07,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:07,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-28 10:40:07,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:40:07,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:40:07,141 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:07,141 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 60 states. [2018-09-28 10:40:11,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:11,925 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-28 10:40:11,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:40:11,925 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 30 [2018-09-28 10:40:11,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:11,926 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:40:11,926 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:40:11,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:11,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:40:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-28 10:40:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:40:11,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-28 10:40:11,931 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-28 10:40:11,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:11,931 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-28 10:40:11,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:40:11,931 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-28 10:40:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-28 10:40:11,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:11,932 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-28 10:40:11,932 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:11,932 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:11,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-28 10:40:11,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:11,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:11,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:11,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:11,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:12,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:12,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:12,904 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:12,927 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-28 10:40:12,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:12,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:15,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:15,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-28 10:40:15,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:40:15,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:40:15,853 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:15,853 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 62 states. [2018-09-28 10:40:22,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:22,313 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-28 10:40:22,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:40:22,313 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 31 [2018-09-28 10:40:22,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:22,314 INFO L225 Difference]: With dead ends: 34 [2018-09-28 10:40:22,314 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:40:22,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:22,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:40:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 10:40:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 10:40:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-28 10:40:22,325 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-28 10:40:22,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:22,325 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-28 10:40:22,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:40:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-28 10:40:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:40:22,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:22,326 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-28 10:40:22,326 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:22,327 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:22,327 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-28 10:40:22,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:22,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:22,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:22,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:22,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:23,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:23,345 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:23,355 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:23,379 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-28 10:40:23,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:23,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:25,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:25,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-28 10:40:25,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:40:25,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:40:25,166 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:25,166 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 64 states. [2018-09-28 10:40:30,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:30,131 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-28 10:40:30,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:40:30,132 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 32 [2018-09-28 10:40:30,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:30,133 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:40:30,133 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:40:30,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:30,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:40:30,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-28 10:40:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:40:30,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-28 10:40:30,138 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-28 10:40:30,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:30,138 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-28 10:40:30,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:40:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-28 10:40:30,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 10:40:30,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:30,139 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-28 10:40:30,139 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:30,139 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:30,139 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-28 10:40:30,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:30,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:30,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:30,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:30,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:31,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:31,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:31,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:31,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:33,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:33,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-28 10:40:33,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:40:33,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:40:33,027 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:33,027 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 66 states. [2018-09-28 10:40:40,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:40,256 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-28 10:40:40,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:40:40,256 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 33 [2018-09-28 10:40:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:40,257 INFO L225 Difference]: With dead ends: 36 [2018-09-28 10:40:40,257 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:40:40,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:40:40,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 10:40:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:40:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-28 10:40:40,262 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-28 10:40:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:40,262 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-28 10:40:40,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:40:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-28 10:40:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:40:40,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:40,263 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-28 10:40:40,263 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:40,263 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:40,263 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-28 10:40:40,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:40,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:40,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:40,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:40,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:41,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:41,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:41,225 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:41,244 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:41,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:41,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:43,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:43,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-28 10:40:43,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:40:43,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:40:43,163 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:43,163 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 68 states. [2018-09-28 10:40:48,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:48,952 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-28 10:40:48,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:40:48,953 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 34 [2018-09-28 10:40:48,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:48,954 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:40:48,954 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:40:48,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:48,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:40:48,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-28 10:40:48,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-28 10:40:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-28 10:40:48,959 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-28 10:40:48,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:48,959 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-28 10:40:48,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:40:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-28 10:40:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-28 10:40:48,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:48,960 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-28 10:40:48,961 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:48,961 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:48,961 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-28 10:40:48,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:48,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:48,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:48,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:48,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:50,002 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:50,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:50,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:50,040 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-28 10:40:50,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:50,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:52,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:52,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-28 10:40:52,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:40:52,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:40:52,092 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:52,092 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 70 states. [2018-09-28 10:41:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:01,176 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-28 10:41:01,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:41:01,177 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 35 [2018-09-28 10:41:01,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:01,178 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:41:01,178 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:41:01,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:41:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:41:01,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:41:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-28 10:41:01,182 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-28 10:41:01,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:01,183 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-28 10:41:01,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:41:01,183 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-28 10:41:01,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:41:01,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:01,183 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-28 10:41:01,184 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:01,184 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:01,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-28 10:41:01,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:01,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:01,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:01,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:01,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:03,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:03,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:03,194 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:03,218 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:03,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:03,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:05,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:05,631 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-28 10:41:05,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:41:05,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:41:05,632 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:05,632 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 72 states. [2018-09-28 10:41:13,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:13,519 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-28 10:41:13,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:41:13,519 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 36 [2018-09-28 10:41:13,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:13,520 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:41:13,520 INFO L226 Difference]: Without dead ends: 38 [2018-09-28 10:41:13,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:13,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-28 10:41:13,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-28 10:41:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-28 10:41:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-28 10:41:13,524 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-28 10:41:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:13,524 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-28 10:41:13,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:41:13,524 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-28 10:41:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-28 10:41:13,525 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:13,525 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-28 10:41:13,525 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:13,525 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:13,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-28 10:41:13,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:13,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:13,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:13,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:13,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:14,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:14,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:14,964 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:14,990 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-28 10:41:14,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:14,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:17,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:17,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-28 10:41:17,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:41:17,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:41:17,274 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:17,274 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 74 states. [2018-09-28 10:41:25,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:25,020 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-28 10:41:25,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:41:25,021 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 37 [2018-09-28 10:41:25,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:25,021 INFO L225 Difference]: With dead ends: 40 [2018-09-28 10:41:25,021 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:41:25,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:25,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:41:25,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:41:25,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:41:25,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-28 10:41:25,026 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-28 10:41:25,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:25,027 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-28 10:41:25,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:41:25,027 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-28 10:41:25,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:41:25,028 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:25,028 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-28 10:41:25,029 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:25,029 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:25,029 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-28 10:41:25,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:25,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:25,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:25,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:25,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:26,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:26,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:26,273 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:26,311 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:41:26,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:26,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:28,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:28,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-28 10:41:28,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-28 10:41:28,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-28 10:41:28,700 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:28,700 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 76 states. [2018-09-28 10:41:36,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:36,285 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-28 10:41:36,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:41:36,285 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 38 [2018-09-28 10:41:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:36,286 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:41:36,286 INFO L226 Difference]: Without dead ends: 40 [2018-09-28 10:41:36,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:36,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-28 10:41:36,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-28 10:41:36,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-28 10:41:36,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-28 10:41:36,290 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-28 10:41:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:36,290 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-28 10:41:36,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-28 10:41:36,290 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-28 10:41:36,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-28 10:41:36,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:36,291 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-28 10:41:36,291 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:36,291 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:36,291 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-28 10:41:36,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:36,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:36,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:36,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:36,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:37,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:37,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:37,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:37,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:40,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:40,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-28 10:41:40,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-28 10:41:40,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-28 10:41:40,283 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:40,284 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 78 states. [2018-09-28 10:41:47,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:47,770 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-28 10:41:47,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:41:47,771 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 39 [2018-09-28 10:41:47,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:47,772 INFO L225 Difference]: With dead ends: 42 [2018-09-28 10:41:47,772 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:41:47,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:47,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:41:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:41:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:41:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-28 10:41:47,776 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-28 10:41:47,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:47,776 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-28 10:41:47,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-28 10:41:47,776 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-28 10:41:47,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:41:47,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:47,777 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-28 10:41:47,777 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:47,777 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:47,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-28 10:41:47,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:47,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:47,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:47,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:47,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:49,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:49,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:49,529 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:49,552 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:49,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:49,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:52,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:52,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-28 10:41:52,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-28 10:41:52,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-28 10:41:52,429 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:52,429 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 80 states. [2018-09-28 10:42:00,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:00,698 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-28 10:42:00,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:42:00,699 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 40 [2018-09-28 10:42:00,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:00,699 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:42:00,699 INFO L226 Difference]: Without dead ends: 42 [2018-09-28 10:42:00,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:00,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-28 10:42:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-28 10:42:00,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-28 10:42:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-28 10:42:00,703 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-28 10:42:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:00,703 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-28 10:42:00,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-28 10:42:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-28 10:42:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-28 10:42:00,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:00,704 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-28 10:42:00,704 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:00,704 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:00,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-28 10:42:00,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:00,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:00,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:00,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:00,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:03,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:03,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:03,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:03,207 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-28 10:42:03,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:03,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:06,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:06,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-28 10:42:06,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-28 10:42:06,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-28 10:42:06,088 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:06,088 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 82 states. [2018-09-28 10:42:15,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:15,427 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-28 10:42:15,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:42:15,427 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 41 [2018-09-28 10:42:15,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:15,427 INFO L225 Difference]: With dead ends: 44 [2018-09-28 10:42:15,428 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:42:15,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:15,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:42:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:42:15,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:42:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-28 10:42:15,430 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-28 10:42:15,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:15,431 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-28 10:42:15,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-28 10:42:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-28 10:42:15,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:42:15,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:15,431 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-28 10:42:15,431 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:15,431 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:15,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-28 10:42:15,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:15,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:15,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:15,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:15,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:16,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:16,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:16,874 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:16,899 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:16,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:16,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:19,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:19,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-28 10:42:19,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-28 10:42:19,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-28 10:42:19,878 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:19,878 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 84 states. [2018-09-28 10:42:31,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:31,715 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-28 10:42:31,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:42:31,716 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 42 [2018-09-28 10:42:31,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:31,717 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:42:31,717 INFO L226 Difference]: Without dead ends: 44 [2018-09-28 10:42:31,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:31,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-28 10:42:31,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-28 10:42:31,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-28 10:42:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-28 10:42:31,720 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-28 10:42:31,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:31,720 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-28 10:42:31,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-28 10:42:31,721 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-28 10:42:31,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-28 10:42:31,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:31,721 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-28 10:42:31,721 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:31,721 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:31,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-28 10:42:31,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:31,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:31,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:31,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:31,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:33,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:33,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:33,442 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:33,477 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-28 10:42:33,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:33,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:36,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:36,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-28 10:42:36,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-28 10:42:36,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-28 10:42:36,770 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:36,770 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 86 states. Received shutdown request... [2018-09-28 10:42:46,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:42:46,503 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:42:46,507 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:42:46,508 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:42:46 BoogieIcfgContainer [2018-09-28 10:42:46,508 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:42:46,508 INFO L168 Benchmark]: Toolchain (without parser) took 249987.57 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -83.4 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 176.2 MB). Peak memory consumption was 92.8 MB. Max. memory is 7.1 GB. [2018-09-28 10:42:46,510 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:42:46,510 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:42:46,511 INFO L168 Benchmark]: Boogie Preprocessor took 24.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:42:46,511 INFO L168 Benchmark]: RCFGBuilder took 262.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:42:46,512 INFO L168 Benchmark]: TraceAbstraction took 249654.34 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -83.4 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 155.1 MB). Peak memory consumption was 71.7 MB. Max. memory is 7.1 GB. [2018-09-28 10:42:46,519 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.88 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 24.27 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 262.57 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 249654.34 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -83.4 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 155.1 MB). Peak memory consumption was 71.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 18]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 18). Cancelled while BasicCegarLoop was constructing difference of abstraction (44states) and FLOYD_HOARE automaton (currently 43 states, 86 states before enhancement), while ReachableStatesComputation was computing reachable states (41 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 249.5s OverallTime, 42 OverallIterations, 41 TraceHistogramMax, 161.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 84 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 41101 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1805 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1805 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=41, 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: 0.1s AutomataMinimizationTime, 41 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 84.8s InterpolantComputationTime, 1888 NumberOfCodeBlocks, 1888 NumberOfCodeBlocksAsserted, 321 NumberOfCheckSat, 1805 ConstructedInterpolants, 0 QuantifiedInterpolants, 664119 SizeOfPredicates, 0 NumberOfNonLiveVariables, 3731 ConjunctsInSsa, 3608 ConjunctsInUnsatCore, 83 InterpolantComputations, 1 PerfectInterpolantSequences, 0/24682 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/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-42-46-539.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-42-46-539.csv Completed graceful shutdown