java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:59:15,572 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:59:15,574 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:59:15,586 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:59:15,587 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:59:15,588 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:59:15,589 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:59:15,591 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:59:15,593 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:59:15,594 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:59:15,595 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 23:59:15,595 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 23:59:15,596 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 23:59:15,597 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 23:59:15,598 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 23:59:15,599 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 23:59:15,600 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 23:59:15,602 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 23:59:15,604 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 23:59:15,606 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 23:59:15,607 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 23:59:15,608 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 23:59:15,611 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 23:59:15,620 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:59:15,635 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:59:15,635 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:59:15,636 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:59:15,636 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:59:15,637 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:59:15,637 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:59:15,637 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:59:15,638 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:59:15,638 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:59:15,638 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:59:15,638 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:59:15,638 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:59:15,639 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:59:15,639 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:59:15,639 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:59:15,639 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:59:15,639 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:59:15,640 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:59:15,640 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:59:15,640 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:59:15,640 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:59:15,640 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:59:15,641 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:59:15,641 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:59:15,641 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:59:15,641 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:59:15,641 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:59:15,642 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:59:15,642 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:59:15,642 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:59:15,685 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:59:15,698 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:59:15,702 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:59:15,704 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:59:15,705 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:59:15,706 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl [2018-09-30 23:59:15,706 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl' [2018-09-30 23:59:15,753 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:59:15,757 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:59:15,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:59:15,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:59:15,758 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:59:15,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:59:15" (1/1) ... [2018-09-30 23:59:15,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:59:15" (1/1) ... [2018-09-30 23:59:15,799 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 23:59:15,800 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 23:59:15,800 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 23:59:15,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:59:15,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:59:15,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:59:15,803 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:59:15,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:59:15" (1/1) ... [2018-09-30 23:59:15,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:59:15" (1/1) ... [2018-09-30 23:59:15,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:59:15" (1/1) ... [2018-09-30 23:59:15,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:59:15" (1/1) ... [2018-09-30 23:59:15,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:59:15" (1/1) ... [2018-09-30 23:59:15,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:59:15" (1/1) ... [2018-09-30 23:59:15,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:59:15" (1/1) ... [2018-09-30 23:59:15,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:59:15,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:59:15,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:59:15,825 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:59:15,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:59:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:59:15,904 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 23:59:15,904 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 23:59:15,904 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 23:59:16,077 INFO L345 CfgBuilder]: Using library mode [2018-09-30 23:59:16,078 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:59:16 BoogieIcfgContainer [2018-09-30 23:59:16,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:59:16,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:59:16,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:59:16,083 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:59:16,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:59:15" (1/2) ... [2018-09-30 23:59:16,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13317e96 and model type MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:59:16, skipping insertion in model container [2018-09-30 23:59:16,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:59:16" (2/2) ... [2018-09-30 23:59:16,087 INFO L112 eAbstractionObserver]: Analyzing ICFG MonadicInvariant01.bpl [2018-09-30 23:59:16,097 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:59:16,105 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:59:16,157 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:59:16,158 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:59:16,158 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:59:16,158 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:59:16,158 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:59:16,158 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:59:16,159 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:59:16,159 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:59:16,159 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:59:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 23:59:16,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 23:59:16,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:16,181 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 23:59:16,182 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:16,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:16,189 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-09-30 23:59:16,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:16,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:16,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:16,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:16,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:16,332 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:59:16,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 23:59:16,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:59:16,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:59:16,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:59:16,353 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 23:59:16,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:16,440 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 23:59:16,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:59:16,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 23:59:16,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:16,455 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:59:16,456 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 23:59:16,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:59:16,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 23:59:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 23:59:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 23:59:16,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 23:59:16,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-09-30 23:59:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:16,512 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 23:59:16,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:59:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 23:59:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:59:16,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:16,513 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 23:59:16,513 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:16,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:16,514 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-09-30 23:59:16,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:16,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:16,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:16,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:16,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:16,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:16,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:16,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:16,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:16,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:16,976 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-30 23:59:16,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:59:16,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:59:16,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:59:16,977 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-30 23:59:17,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:17,103 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 23:59:17,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:59:17,106 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 23:59:17,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:17,106 INFO L225 Difference]: With dead ends: 9 [2018-09-30 23:59:17,106 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 23:59:17,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:59:17,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 23:59:17,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 23:59:17,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 23:59:17,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 23:59:17,114 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-09-30 23:59:17,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:17,114 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 23:59:17,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:59:17,115 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 23:59:17,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:59:17,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:17,115 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-09-30 23:59:17,116 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:17,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:17,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-09-30 23:59:17,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:17,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:17,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:17,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:17,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:17,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:17,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:17,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:17,273 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:17,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:17,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:17,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:17,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-30 23:59:17,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:59:17,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:59:17,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:59:17,411 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-30 23:59:17,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:17,622 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 23:59:17,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:59:17,623 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-30 23:59:17,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:17,623 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:59:17,623 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 23:59:17,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:59:17,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 23:59:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 23:59:17,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 23:59:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 23:59:17,628 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-09-30 23:59:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:17,628 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 23:59:17,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:59:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 23:59:17,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:59:17,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:17,629 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-09-30 23:59:17,631 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:17,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:17,631 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-09-30 23:59:17,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:17,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:17,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:17,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:17,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:17,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:17,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:17,814 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:17,825 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:59:17,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:17,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:17,943 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:17,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 23:59:17,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:59:17,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:59:17,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:59:17,945 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-30 23:59:17,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:17,996 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 23:59:17,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:59:17,997 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-30 23:59:17,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:17,998 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:59:17,999 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 23:59:17,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:59:18,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 23:59:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 23:59:18,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 23:59:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 23:59:18,003 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-09-30 23:59:18,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:18,003 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 23:59:18,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:59:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 23:59:18,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:59:18,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:18,004 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-09-30 23:59:18,004 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:18,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:18,005 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-09-30 23:59:18,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:18,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:18,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:18,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:18,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:18,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:18,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:18,191 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:18,197 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:18,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:18,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:18,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:18,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-30 23:59:18,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:59:18,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:59:18,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:59:18,348 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-30 23:59:18,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:18,439 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 23:59:18,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:59:18,440 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-30 23:59:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:18,440 INFO L225 Difference]: With dead ends: 15 [2018-09-30 23:59:18,441 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 23:59:18,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:59:18,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 23:59:18,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 23:59:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:59:18,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 23:59:18,445 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-30 23:59:18,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:18,446 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 23:59:18,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:59:18,446 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 23:59:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:59:18,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:18,447 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-09-30 23:59:18,447 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:18,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:18,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-09-30 23:59:18,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:18,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:18,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:18,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:18,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:18,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:18,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:18,832 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:18,912 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:59:18,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:18,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:19,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:19,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 23:59:19,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:59:19,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:59:19,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:59:19,056 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-30 23:59:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:19,135 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 23:59:19,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:59:19,137 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 23:59:19,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:19,138 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:59:19,139 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 23:59:19,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:59:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 23:59:19,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 23:59:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:59:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 23:59:19,143 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-30 23:59:19,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:19,144 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 23:59:19,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:59:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 23:59:19,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:59:19,145 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:19,145 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-09-30 23:59:19,145 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:19,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:19,146 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-09-30 23:59:19,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:19,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:19,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:19,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:19,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:19,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:19,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:19,269 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:19,304 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:59:19,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:19,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:19,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:19,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-30 23:59:19,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:59:19,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:59:19,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:59:19,485 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-30 23:59:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:19,541 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 23:59:19,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:59:19,542 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-30 23:59:19,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:19,544 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:59:19,544 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 23:59:19,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:59:19,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 23:59:19,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 23:59:19,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:59:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 23:59:19,550 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-30 23:59:19,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:19,550 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 23:59:19,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:59:19,550 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 23:59:19,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:59:19,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:19,551 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-09-30 23:59:19,551 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:19,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:19,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-09-30 23:59:19,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:19,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:19,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:19,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:19,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:19,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:19,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:19,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:19,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:20,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:20,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-30 23:59:20,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:59:20,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:59:20,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:59:20,068 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-30 23:59:20,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:20,131 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 23:59:20,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:59:20,132 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-30 23:59:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:20,133 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:59:20,134 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 23:59:20,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:59:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 23:59:20,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 23:59:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:59:20,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 23:59:20,139 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-09-30 23:59:20,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:20,139 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 23:59:20,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:59:20,140 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 23:59:20,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:20,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:20,140 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-09-30 23:59:20,141 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:20,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:20,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-09-30 23:59:20,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:20,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:20,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:20,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:20,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:20,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:20,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:20,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:20,272 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:20,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:20,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:20,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:20,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-30 23:59:20,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:59:20,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:59:20,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:59:20,457 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-30 23:59:20,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:20,527 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 23:59:20,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:20,528 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-30 23:59:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:20,530 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:59:20,530 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 23:59:20,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:59:20,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 23:59:20,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 23:59:20,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:59:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 23:59:20,535 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-09-30 23:59:20,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:20,535 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 23:59:20,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:59:20,535 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 23:59:20,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:59:20,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:20,536 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-09-30 23:59:20,536 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:20,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:20,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-09-30 23:59:20,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:20,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:20,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:20,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:20,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:20,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:20,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:20,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:20,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 23:59:20,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:20,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:20,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:20,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-30 23:59:20,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:59:20,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:59:20,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:59:20,941 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-30 23:59:21,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:21,218 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 23:59:21,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:59:21,218 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-30 23:59:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:21,219 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:59:21,219 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 23:59:21,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:59:21,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 23:59:21,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 23:59:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:59:21,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 23:59:21,230 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-09-30 23:59:21,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:21,231 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 23:59:21,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:59:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 23:59:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 23:59:21,232 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:21,232 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-09-30 23:59:21,233 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:21,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:21,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-09-30 23:59:21,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:21,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:21,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:21,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:21,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:21,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:21,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:21,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:21,470 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:21,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:21,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:21,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:21,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-30 23:59:21,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:59:21,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:59:21,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:59:21,705 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-30 23:59:21,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:21,770 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 23:59:21,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:59:21,770 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-30 23:59:21,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:21,772 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:59:21,772 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 23:59:21,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:59:21,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 23:59:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 23:59:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:59:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 23:59:21,778 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-09-30 23:59:21,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:21,779 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 23:59:21,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:59:21,779 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 23:59:21,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:59:21,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:21,780 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-09-30 23:59:21,780 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:21,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:21,781 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-09-30 23:59:21,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:21,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:21,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:21,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:21,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:22,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:22,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:22,063 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:22,088 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 23:59:22,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:22,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:22,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:22,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-30 23:59:22,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:59:22,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:59:22,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:59:22,565 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-30 23:59:22,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:22,645 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 23:59:22,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:59:22,646 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-30 23:59:22,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:22,647 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:59:22,647 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 23:59:22,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:59:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 23:59:22,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 23:59:22,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:59:22,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 23:59:22,653 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-09-30 23:59:22,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:22,654 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 23:59:22,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:59:22,654 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 23:59:22,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 23:59:22,655 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:22,655 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-09-30 23:59:22,655 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:22,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:22,655 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-09-30 23:59:22,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:22,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:22,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:22,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:22,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:22,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:22,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:22,975 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:23,027 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:59:23,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:23,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:23,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:23,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-30 23:59:23,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:59:23,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:59:23,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:59:23,328 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-30 23:59:23,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:23,398 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 23:59:23,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:59:23,398 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-30 23:59:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:23,399 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:59:23,399 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 23:59:23,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:59:23,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 23:59:23,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 23:59:23,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:59:23,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 23:59:23,405 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-09-30 23:59:23,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:23,406 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 23:59:23,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:59:23,406 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 23:59:23,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 23:59:23,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:23,407 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-09-30 23:59:23,407 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:23,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:23,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-09-30 23:59:23,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:23,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:23,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:23,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:23,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:23,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:23,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:23,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:23,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:23,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:23,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-30 23:59:23,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:59:23,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:59:23,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:59:23,878 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-30 23:59:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:23,955 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 23:59:23,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:59:23,955 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-30 23:59:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:23,956 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:59:23,956 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 23:59:23,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:59:23,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 23:59:23,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 23:59:23,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:59:23,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 23:59:23,961 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-09-30 23:59:23,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:23,961 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 23:59:23,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:59:23,962 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 23:59:23,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 23:59:23,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:23,962 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-09-30 23:59:23,963 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:23,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:23,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-09-30 23:59:23,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:23,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:23,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:23,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:23,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:24,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:24,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:24,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:24,214 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:24,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:24,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:24,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:24,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-30 23:59:24,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:59:24,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:59:24,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:59:24,566 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-30 23:59:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:24,668 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 23:59:24,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:59:24,669 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-30 23:59:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:24,670 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:59:24,670 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 23:59:24,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:59:24,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 23:59:24,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 23:59:24,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 23:59:24,676 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-09-30 23:59:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:24,676 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 23:59:24,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:59:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 23:59:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:59:24,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:24,678 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-09-30 23:59:24,678 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:24,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:24,678 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-09-30 23:59:24,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:24,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:24,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:24,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:24,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:24,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:24,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:24,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:25,109 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 23:59:25,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:25,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:25,543 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:25,543 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-30 23:59:25,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:59:25,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:59:25,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:59:25,545 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-30 23:59:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:25,653 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 23:59:25,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:59:25,653 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-30 23:59:25,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:25,654 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:59:25,654 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 23:59:25,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:59:25,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 23:59:25,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 23:59:25,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 23:59:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 23:59:25,660 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-09-30 23:59:25,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:25,660 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 23:59:25,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:59:25,660 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 23:59:25,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 23:59:25,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:25,661 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-09-30 23:59:25,661 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:25,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-09-30 23:59:25,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:25,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:25,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:25,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:25,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:25,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:25,859 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:25,867 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:25,877 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:25,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:25,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:26,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:26,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-30 23:59:26,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:59:26,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:59:26,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:59:26,187 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-30 23:59:26,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:26,265 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 23:59:26,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:59:26,266 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-30 23:59:26,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:26,267 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:59:26,267 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 23:59:26,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:59:26,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 23:59:26,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 23:59:26,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 23:59:26,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 23:59:26,273 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-09-30 23:59:26,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:26,273 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 23:59:26,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:59:26,273 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 23:59:26,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 23:59:26,274 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:26,274 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-09-30 23:59:26,274 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:26,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:26,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-09-30 23:59:26,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:26,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:26,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:26,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:26,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:27,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:27,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:27,247 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:27,266 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 23:59:27,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:27,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:27,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:27,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-30 23:59:27,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:59:27,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:59:27,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:59:27,737 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-30 23:59:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:27,989 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 23:59:27,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:59:27,990 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-30 23:59:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:27,991 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:59:27,991 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 23:59:27,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:59:27,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 23:59:27,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 23:59:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 23:59:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 23:59:27,998 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-09-30 23:59:27,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:27,998 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 23:59:27,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:59:27,999 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 23:59:27,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 23:59:27,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:27,999 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-09-30 23:59:28,000 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:28,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:28,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-09-30 23:59:28,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:28,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:28,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:28,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:28,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:28,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:28,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:28,543 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:28,560 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:59:28,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:28,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:29,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:29,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-30 23:59:29,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:59:29,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:59:29,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:59:29,126 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-30 23:59:29,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:29,208 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 23:59:29,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:59:29,208 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-30 23:59:29,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:29,209 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:59:29,209 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 23:59:29,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:59:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 23:59:29,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 23:59:29,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 23:59:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 23:59:29,215 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-09-30 23:59:29,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:29,215 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 23:59:29,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:59:29,215 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 23:59:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 23:59:29,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:29,216 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-09-30 23:59:29,216 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:29,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:29,216 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-09-30 23:59:29,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:29,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:29,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:29,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:29,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:29,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:29,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:29,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:29,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:30,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:30,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-30 23:59:30,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:59:30,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:59:30,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:59:30,081 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-30 23:59:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:30,225 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 23:59:30,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:59:30,226 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-30 23:59:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:30,226 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:59:30,227 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 23:59:30,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:59:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 23:59:30,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 23:59:30,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 23:59:30,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 23:59:30,233 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-09-30 23:59:30,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:30,234 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 23:59:30,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:59:30,234 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 23:59:30,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 23:59:30,235 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:30,235 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-09-30 23:59:30,235 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:30,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:30,235 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-09-30 23:59:30,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:30,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:30,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:30,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:30,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:30,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:30,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:30,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:30,694 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:30,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:30,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:31,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:31,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-30 23:59:31,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:59:31,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:59:31,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:59:31,042 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-30 23:59:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:31,154 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 23:59:31,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:59:31,154 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-30 23:59:31,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:31,155 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:59:31,155 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 23:59:31,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:59:31,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 23:59:31,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 23:59:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 23:59:31,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 23:59:31,165 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-09-30 23:59:31,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:31,165 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 23:59:31,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:59:31,165 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 23:59:31,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 23:59:31,166 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:31,166 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-09-30 23:59:31,166 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:31,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:31,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-09-30 23:59:31,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:31,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:31,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:31,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:31,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:31,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:31,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:31,664 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:31,686 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 23:59:31,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:31,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:32,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:32,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-30 23:59:32,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:59:32,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:59:32,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:59:32,082 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-30 23:59:32,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:32,237 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 23:59:32,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:59:32,239 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-30 23:59:32,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:32,239 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:59:32,239 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 23:59:32,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:59:32,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 23:59:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 23:59:32,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 23:59:32,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 23:59:32,245 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-09-30 23:59:32,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:32,245 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 23:59:32,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:59:32,245 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 23:59:32,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 23:59:32,246 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:32,246 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-09-30 23:59:32,246 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:32,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:32,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-09-30 23:59:32,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:32,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:32,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:32,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:32,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:32,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:32,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:32,662 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:32,673 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:32,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:32,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:33,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:33,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-30 23:59:33,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:59:33,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:59:33,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:59:33,230 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-30 23:59:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:33,328 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 23:59:33,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:59:33,329 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-30 23:59:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:33,330 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:59:33,330 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 23:59:33,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:59:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 23:59:33,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 23:59:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 23:59:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 23:59:33,336 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-09-30 23:59:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:33,337 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 23:59:33,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:59:33,337 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 23:59:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 23:59:33,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:33,338 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-09-30 23:59:33,338 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:33,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:33,338 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-09-30 23:59:33,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:33,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:33,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:33,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:33,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:33,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:33,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:33,716 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:33,738 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 23:59:33,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:33,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:34,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:34,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-30 23:59:34,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:59:34,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:59:34,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:59:34,201 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-30 23:59:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:34,332 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 23:59:34,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:59:34,333 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-30 23:59:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:34,333 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:59:34,334 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 23:59:34,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:59:34,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 23:59:34,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 23:59:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 23:59:34,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 23:59:34,340 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-09-30 23:59:34,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:34,340 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 23:59:34,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:59:34,340 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 23:59:34,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 23:59:34,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:34,341 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-09-30 23:59:34,341 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:34,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:34,341 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-09-30 23:59:34,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:34,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:34,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:34,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:34,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:34,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:34,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:34,847 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:34,895 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 23:59:34,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:34,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:35,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:35,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-30 23:59:35,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:59:35,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:59:35,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:59:35,367 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-30 23:59:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:35,547 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 23:59:35,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:59:35,548 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-30 23:59:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:35,549 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:59:35,549 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 23:59:35,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:59:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 23:59:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 23:59:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 23:59:35,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 23:59:35,553 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-09-30 23:59:35,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:35,554 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 23:59:35,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:59:35,554 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 23:59:35,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 23:59:35,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:35,555 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-09-30 23:59:35,555 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:35,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:35,555 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-09-30 23:59:35,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:35,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:35,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:35,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:35,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:35,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:35,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:35,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:36,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:36,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:36,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-30 23:59:36,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:59:36,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:59:36,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:59:36,469 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-30 23:59:36,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:36,592 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 23:59:36,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:59:36,592 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-30 23:59:36,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:36,593 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:59:36,593 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 23:59:36,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:59:36,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 23:59:36,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 23:59:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 23:59:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 23:59:36,599 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-09-30 23:59:36,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:36,599 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 23:59:36,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:59:36,599 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 23:59:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 23:59:36,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:36,600 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-09-30 23:59:36,600 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:36,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:36,601 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-09-30 23:59:36,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:36,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:36,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:36,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:36,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:37,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:37,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:37,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:37,066 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:37,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:37,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:37,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:37,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-30 23:59:37,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:59:37,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:59:37,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:59:37,865 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-30 23:59:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:38,009 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 23:59:38,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:59:38,010 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-30 23:59:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:38,011 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:59:38,011 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 23:59:38,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:59:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 23:59:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 23:59:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 23:59:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 23:59:38,017 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-09-30 23:59:38,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:38,017 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 23:59:38,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:59:38,017 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 23:59:38,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 23:59:38,018 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:38,018 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-09-30 23:59:38,018 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:38,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:38,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-09-30 23:59:38,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:38,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:38,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:38,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:38,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:38,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:38,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:38,496 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:38,520 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 23:59:38,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:38,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:39,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:39,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-30 23:59:39,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:59:39,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:59:39,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:59:39,041 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-30 23:59:39,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:39,148 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 23:59:39,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:59:39,149 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-30 23:59:39,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:39,150 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:59:39,150 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 23:59:39,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:59:39,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 23:59:39,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 23:59:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 23:59:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 23:59:39,154 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-09-30 23:59:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:39,154 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 23:59:39,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:59:39,155 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 23:59:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 23:59:39,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:39,155 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-09-30 23:59:39,155 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:39,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:39,156 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-09-30 23:59:39,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:39,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:39,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:39,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:39,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:39,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:39,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:39,625 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:39,660 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:39,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:39,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:41,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:41,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-30 23:59:41,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:59:41,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:59:41,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:59:41,089 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-30 23:59:41,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:41,293 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 23:59:41,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:59:41,294 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-30 23:59:41,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:41,295 INFO L225 Difference]: With dead ends: 63 [2018-09-30 23:59:41,295 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 23:59:41,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:59:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 23:59:41,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 23:59:41,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 23:59:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 23:59:41,302 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-09-30 23:59:41,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:41,302 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 23:59:41,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:59:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 23:59:41,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 23:59:41,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:41,303 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-09-30 23:59:41,303 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:41,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:41,303 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-09-30 23:59:41,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:41,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:41,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:41,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:41,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:41,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:41,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:41,789 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:41,816 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 23:59:41,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:41,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:42,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:42,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-30 23:59:42,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:59:42,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:59:42,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:59:42,501 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-30 23:59:42,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:42,667 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 23:59:42,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:59:42,668 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-30 23:59:42,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:42,668 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:59:42,669 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 23:59:42,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:59:42,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 23:59:42,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 23:59:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 23:59:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 23:59:42,673 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-09-30 23:59:42,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:42,674 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 23:59:42,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:59:42,674 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 23:59:42,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 23:59:42,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:42,674 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-09-30 23:59:42,675 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:42,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:42,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-09-30 23:59:42,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:42,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:42,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:42,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:42,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:43,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:43,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:43,475 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:43,559 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 23:59:43,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:43,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:44,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:44,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-30 23:59:44,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:59:44,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:59:44,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:59:44,216 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-30 23:59:44,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:44,334 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 23:59:44,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:59:44,335 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-30 23:59:44,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:44,335 INFO L225 Difference]: With dead ends: 67 [2018-09-30 23:59:44,336 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 23:59:44,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:59:44,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 23:59:44,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 23:59:44,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 23:59:44,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 23:59:44,340 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-09-30 23:59:44,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:44,340 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 23:59:44,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:59:44,340 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 23:59:44,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 23:59:44,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:44,341 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-09-30 23:59:44,341 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:44,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:44,341 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-09-30 23:59:44,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:44,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:44,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:44,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:44,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:44,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:44,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:44,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:44,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:45,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:45,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-30 23:59:45,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:59:45,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:59:45,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:59:45,599 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-30 23:59:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:45,774 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 23:59:45,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:59:45,774 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-30 23:59:45,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:45,775 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:59:45,775 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 23:59:45,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:59:45,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 23:59:45,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 23:59:45,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 23:59:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 23:59:45,782 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-09-30 23:59:45,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:45,782 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 23:59:45,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:59:45,782 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 23:59:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 23:59:45,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:45,783 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-09-30 23:59:45,783 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:45,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:45,783 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-09-30 23:59:45,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:45,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:45,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:45,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:45,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:46,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:46,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:46,392 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:46,410 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:46,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:46,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:47,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:47,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-30 23:59:47,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:59:47,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:59:47,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:59:47,157 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-30 23:59:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:47,316 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 23:59:47,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:59:47,316 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-30 23:59:47,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:47,317 INFO L225 Difference]: With dead ends: 71 [2018-09-30 23:59:47,317 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 23:59:47,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:59:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 23:59:47,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 23:59:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 23:59:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 23:59:47,321 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-09-30 23:59:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:47,321 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 23:59:47,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:59:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 23:59:47,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 23:59:47,322 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:47,322 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-09-30 23:59:47,322 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:47,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:47,323 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-09-30 23:59:47,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:47,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:47,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:47,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:47,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:48,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:48,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:48,200 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:48,232 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 23:59:48,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:48,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:49,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:49,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-30 23:59:49,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:59:49,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:59:49,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:59:49,090 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-30 23:59:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:49,293 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 23:59:49,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:59:49,293 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-30 23:59:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:49,294 INFO L225 Difference]: With dead ends: 73 [2018-09-30 23:59:49,295 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 23:59:49,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:59:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 23:59:49,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 23:59:49,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 23:59:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 23:59:49,299 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-09-30 23:59:49,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:49,299 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 23:59:49,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:59:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 23:59:49,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 23:59:49,300 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:49,300 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-09-30 23:59:49,300 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:49,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:49,300 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-09-30 23:59:49,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:49,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:49,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:49,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:49,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:49,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:49,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:49,915 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:49,936 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:49,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:49,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:50,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:50,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-30 23:59:50,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:59:50,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:59:50,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:59:50,685 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-30 23:59:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:50,896 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 23:59:50,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:59:50,896 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-30 23:59:50,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:50,897 INFO L225 Difference]: With dead ends: 75 [2018-09-30 23:59:50,897 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 23:59:50,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:59:50,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 23:59:50,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 23:59:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 23:59:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 23:59:50,902 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-09-30 23:59:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:50,903 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 23:59:50,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:59:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 23:59:50,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 23:59:50,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:50,904 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-09-30 23:59:50,904 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:50,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:50,904 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-09-30 23:59:50,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:50,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:50,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:50,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:50,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:51,603 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:51,603 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:51,610 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:51,647 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 23:59:51,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:51,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:52,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:52,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:52,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-30 23:59:52,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:59:52,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:59:52,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:59:52,467 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-30 23:59:52,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:52,825 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 23:59:52,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:59:52,826 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-30 23:59:52,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:52,827 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:59:52,827 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 23:59:52,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:59:52,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 23:59:52,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 23:59:52,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 23:59:52,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 23:59:52,831 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-09-30 23:59:52,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:52,831 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 23:59:52,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:59:52,832 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 23:59:52,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 23:59:52,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:52,832 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-09-30 23:59:52,832 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:52,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:52,832 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-09-30 23:59:52,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:52,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:52,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:52,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:52,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:52,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:53,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:53,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:53,659 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:53,693 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 23:59:53,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:53,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:54,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:54,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-30 23:59:54,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:59:54,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:59:54,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:59:54,555 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-30 23:59:54,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:54,725 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 23:59:54,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:59:54,726 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-30 23:59:54,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:54,727 INFO L225 Difference]: With dead ends: 79 [2018-09-30 23:59:54,727 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 23:59:54,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:59:54,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 23:59:54,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 23:59:54,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 23:59:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 23:59:54,731 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-09-30 23:59:54,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:54,731 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 23:59:54,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:59:54,732 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 23:59:54,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 23:59:54,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:54,732 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-09-30 23:59:54,733 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:54,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:54,733 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-09-30 23:59:54,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:54,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:54,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:54,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:54,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:55,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:55,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:55,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:55,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:56,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:56,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-30 23:59:56,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:59:56,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:59:56,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:59:56,367 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-30 23:59:56,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:56,525 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 23:59:56,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:59:56,525 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-30 23:59:56,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:56,526 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:59:56,527 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 23:59:56,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:59:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 23:59:56,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 23:59:56,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 23:59:56,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 23:59:56,531 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-09-30 23:59:56,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:56,531 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 23:59:56,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:59:56,531 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 23:59:56,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 23:59:56,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:56,532 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-09-30 23:59:56,532 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:56,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:56,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-09-30 23:59:56,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:56,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:56,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:56,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:56,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:57,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:57,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:57,402 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:57,424 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:57,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:57,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:58,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:58,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-30 23:59:58,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:59:58,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:59:58,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:59:58,581 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-30 23:59:58,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:58,754 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 23:59:58,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:59:58,755 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-30 23:59:58,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:58,756 INFO L225 Difference]: With dead ends: 83 [2018-09-30 23:59:58,756 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 23:59:58,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:59:58,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 23:59:58,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 23:59:58,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 23:59:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 23:59:58,760 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-09-30 23:59:58,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:58,761 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 23:59:58,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:59:58,761 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 23:59:58,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 23:59:58,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:58,761 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-09-30 23:59:58,761 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:58,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:58,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-09-30 23:59:58,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:58,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:58,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:58,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:58,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:59,921 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:59,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:59,930 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:59,965 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 23:59:59,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:59,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:00,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:00,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-10-01 00:00:00,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-01 00:00:00,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-01 00:00:00,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-01 00:00:00,913 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-10-01 00:00:01,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:01,093 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-01 00:00:01,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-01 00:00:01,094 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-10-01 00:00:01,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:01,095 INFO L225 Difference]: With dead ends: 85 [2018-10-01 00:00:01,095 INFO L226 Difference]: Without dead ends: 84 [2018-10-01 00:00:01,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-01 00:00:01,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-01 00:00:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-01 00:00:01,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-01 00:00:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-01 00:00:01,100 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-10-01 00:00:01,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:01,100 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-01 00:00:01,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-01 00:00:01,100 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-01 00:00:01,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-01 00:00:01,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:01,101 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-10-01 00:00:01,101 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:01,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:01,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-10-01 00:00:01,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:01,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:01,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:01,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:01,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:01,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:01,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:01,908 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:01,929 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:01,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:01,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:03,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:03,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-01 00:00:03,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-01 00:00:03,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-01 00:00:03,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-01 00:00:03,069 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-10-01 00:00:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:03,269 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-01 00:00:03,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-01 00:00:03,269 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-10-01 00:00:03,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:03,270 INFO L225 Difference]: With dead ends: 87 [2018-10-01 00:00:03,270 INFO L226 Difference]: Without dead ends: 86 [2018-10-01 00:00:03,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-01 00:00:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-01 00:00:03,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-01 00:00:03,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-01 00:00:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-01 00:00:03,275 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-10-01 00:00:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:03,275 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-01 00:00:03,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-01 00:00:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-01 00:00:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-01 00:00:03,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:03,276 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-10-01 00:00:03,276 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:03,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:03,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-10-01 00:00:03,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:03,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:03,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:03,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:03,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:04,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:04,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:04,136 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:04,176 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-01 00:00:04,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:04,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:05,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:05,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-10-01 00:00:05,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-01 00:00:05,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-01 00:00:05,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-01 00:00:05,311 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-10-01 00:00:05,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:05,495 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-01 00:00:05,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-01 00:00:05,495 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-10-01 00:00:05,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:05,496 INFO L225 Difference]: With dead ends: 89 [2018-10-01 00:00:05,497 INFO L226 Difference]: Without dead ends: 88 [2018-10-01 00:00:05,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-01 00:00:05,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-01 00:00:05,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-01 00:00:05,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-01 00:00:05,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-01 00:00:05,502 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-10-01 00:00:05,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:05,502 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-01 00:00:05,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-01 00:00:05,502 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-01 00:00:05,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-01 00:00:05,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:05,503 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-10-01 00:00:05,503 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:05,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:05,503 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-10-01 00:00:05,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:05,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:05,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:05,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:05,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:06,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:06,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:06,483 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:06,524 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-01 00:00:06,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:06,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:07,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:07,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-10-01 00:00:07,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-01 00:00:07,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-01 00:00:07,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-01 00:00:07,766 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-10-01 00:00:08,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:08,008 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-01 00:00:08,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-01 00:00:08,009 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-10-01 00:00:08,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:08,009 INFO L225 Difference]: With dead ends: 91 [2018-10-01 00:00:08,009 INFO L226 Difference]: Without dead ends: 90 [2018-10-01 00:00:08,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-01 00:00:08,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-01 00:00:08,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-01 00:00:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-01 00:00:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-01 00:00:08,013 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-10-01 00:00:08,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:08,014 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-01 00:00:08,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-01 00:00:08,014 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-01 00:00:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-01 00:00:08,014 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:08,014 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-10-01 00:00:08,014 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:08,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:08,015 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-10-01 00:00:08,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:08,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:08,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:08,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:08,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:09,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:09,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:09,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:09,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:10,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:10,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-01 00:00:10,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-01 00:00:10,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-01 00:00:10,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-01 00:00:10,979 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-10-01 00:00:11,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:11,151 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-01 00:00:11,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-01 00:00:11,151 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-10-01 00:00:11,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:11,152 INFO L225 Difference]: With dead ends: 93 [2018-10-01 00:00:11,152 INFO L226 Difference]: Without dead ends: 92 [2018-10-01 00:00:11,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-01 00:00:11,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-01 00:00:11,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-01 00:00:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-01 00:00:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-01 00:00:11,157 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-10-01 00:00:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:11,157 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-01 00:00:11,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-01 00:00:11,157 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-01 00:00:11,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-01 00:00:11,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:11,158 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-10-01 00:00:11,158 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:11,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:11,158 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-10-01 00:00:11,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:11,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:11,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:11,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:11,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:12,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:12,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:12,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:12,090 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:12,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:12,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:13,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:13,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-10-01 00:00:13,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-01 00:00:13,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-01 00:00:13,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-01 00:00:13,578 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-10-01 00:00:13,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:13,761 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-01 00:00:13,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-01 00:00:13,761 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-10-01 00:00:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:13,762 INFO L225 Difference]: With dead ends: 95 [2018-10-01 00:00:13,763 INFO L226 Difference]: Without dead ends: 94 [2018-10-01 00:00:13,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-01 00:00:13,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-01 00:00:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-01 00:00:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-01 00:00:13,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-01 00:00:13,768 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-10-01 00:00:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:13,768 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-01 00:00:13,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-01 00:00:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-01 00:00:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-01 00:00:13,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:13,769 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-10-01 00:00:13,769 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:13,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:13,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-10-01 00:00:13,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:13,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:13,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:13,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:13,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:14,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:14,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:14,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:14,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-01 00:00:14,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:14,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:16,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:16,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-10-01 00:00:16,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-01 00:00:16,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-01 00:00:16,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-01 00:00:16,293 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-10-01 00:00:16,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:16,519 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-01 00:00:16,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-01 00:00:16,519 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-10-01 00:00:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:16,521 INFO L225 Difference]: With dead ends: 97 [2018-10-01 00:00:16,521 INFO L226 Difference]: Without dead ends: 96 [2018-10-01 00:00:16,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-01 00:00:16,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-01 00:00:16,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-01 00:00:16,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-01 00:00:16,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-01 00:00:16,526 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-10-01 00:00:16,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:16,526 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-01 00:00:16,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-01 00:00:16,527 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-01 00:00:16,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-01 00:00:16,527 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:16,527 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-10-01 00:00:16,527 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:16,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:16,528 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-10-01 00:00:16,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:16,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:16,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:16,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:16,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:17,648 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:17,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:17,655 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:17,681 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:17,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:17,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:19,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:19,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-10-01 00:00:19,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-01 00:00:19,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-01 00:00:19,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-10-01 00:00:19,199 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-10-01 00:00:19,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:19,392 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-01 00:00:19,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-01 00:00:19,393 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-10-01 00:00:19,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:19,394 INFO L225 Difference]: With dead ends: 99 [2018-10-01 00:00:19,394 INFO L226 Difference]: Without dead ends: 98 [2018-10-01 00:00:19,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-10-01 00:00:19,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-01 00:00:19,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-01 00:00:19,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-01 00:00:19,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-01 00:00:19,399 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-10-01 00:00:19,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:19,400 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-01 00:00:19,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-01 00:00:19,400 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-01 00:00:19,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-01 00:00:19,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:19,401 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-10-01 00:00:19,401 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:19,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:19,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-10-01 00:00:19,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:19,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:19,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:19,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:19,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:20,841 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:20,841 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:20,849 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:20,896 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-01 00:00:20,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:20,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:22,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:22,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-01 00:00:22,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-01 00:00:22,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-01 00:00:22,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-01 00:00:22,373 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-10-01 00:00:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:22,592 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-01 00:00:22,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-01 00:00:22,592 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-10-01 00:00:22,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:22,594 INFO L225 Difference]: With dead ends: 101 [2018-10-01 00:00:22,594 INFO L226 Difference]: Without dead ends: 100 [2018-10-01 00:00:22,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-01 00:00:22,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-01 00:00:22,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-01 00:00:22,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-01 00:00:22,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-01 00:00:22,599 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-10-01 00:00:22,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:22,600 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-01 00:00:22,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-01 00:00:22,600 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-01 00:00:22,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-01 00:00:22,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:22,601 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-10-01 00:00:22,601 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:22,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:22,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-10-01 00:00:22,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:22,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:22,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:22,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:22,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:24,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:24,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:24,070 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:24,118 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-01 00:00:24,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:24,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:25,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:25,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-10-01 00:00:25,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-01 00:00:25,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-01 00:00:25,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-01 00:00:25,589 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-10-01 00:00:25,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:25,831 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-01 00:00:25,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-01 00:00:25,831 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-10-01 00:00:25,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:25,832 INFO L225 Difference]: With dead ends: 103 [2018-10-01 00:00:25,832 INFO L226 Difference]: Without dead ends: 102 [2018-10-01 00:00:25,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-01 00:00:25,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-01 00:00:25,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-01 00:00:25,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-01 00:00:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-01 00:00:25,837 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-10-01 00:00:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:25,837 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-01 00:00:25,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-01 00:00:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-01 00:00:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-01 00:00:25,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:25,838 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-10-01 00:00:25,838 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:25,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:25,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-10-01 00:00:25,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:25,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:25,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:25,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:25,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:27,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:27,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:27,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:27,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:30,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:30,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-01 00:00:30,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-01 00:00:30,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-01 00:00:30,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-01 00:00:30,074 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-10-01 00:00:30,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:30,323 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-01 00:00:30,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-01 00:00:30,323 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-10-01 00:00:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:30,325 INFO L225 Difference]: With dead ends: 105 [2018-10-01 00:00:30,325 INFO L226 Difference]: Without dead ends: 104 [2018-10-01 00:00:30,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-01 00:00:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-01 00:00:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-01 00:00:30,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-01 00:00:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-01 00:00:30,331 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-10-01 00:00:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:30,332 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-01 00:00:30,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-01 00:00:30,332 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-01 00:00:30,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-01 00:00:30,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:30,333 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-10-01 00:00:30,333 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:30,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:30,333 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-10-01 00:00:30,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:30,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:30,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:30,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:30,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:31,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:31,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:31,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:31,565 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:31,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:31,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:33,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:33,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-10-01 00:00:33,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-01 00:00:33,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-01 00:00:33,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-01 00:00:33,074 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-10-01 00:00:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:34,864 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-01 00:00:34,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-01 00:00:34,865 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-10-01 00:00:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:34,866 INFO L225 Difference]: With dead ends: 107 [2018-10-01 00:00:34,866 INFO L226 Difference]: Without dead ends: 106 [2018-10-01 00:00:34,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-01 00:00:34,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-01 00:00:34,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-01 00:00:34,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-01 00:00:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-01 00:00:34,871 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-10-01 00:00:34,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:34,872 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-01 00:00:34,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-01 00:00:34,872 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-01 00:00:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-01 00:00:34,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:34,873 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-10-01 00:00:34,873 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:34,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:34,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-10-01 00:00:34,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:34,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:34,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:34,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:34,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:36,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:36,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:36,271 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:36,322 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-01 00:00:36,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:36,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:37,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:37,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-10-01 00:00:37,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-01 00:00:37,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-01 00:00:37,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-10-01 00:00:37,954 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-10-01 00:00:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:38,162 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-01 00:00:38,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-01 00:00:38,162 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-10-01 00:00:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:38,164 INFO L225 Difference]: With dead ends: 109 [2018-10-01 00:00:38,164 INFO L226 Difference]: Without dead ends: 108 [2018-10-01 00:00:38,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-10-01 00:00:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-01 00:00:38,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-01 00:00:38,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-01 00:00:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-01 00:00:38,170 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-10-01 00:00:38,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:38,170 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-01 00:00:38,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-01 00:00:38,170 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-01 00:00:38,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-01 00:00:38,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:38,171 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-10-01 00:00:38,171 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:38,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:38,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-10-01 00:00:38,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:38,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:38,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:38,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:38,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:39,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:39,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-01 00:00:39,712 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:39,756 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:39,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:39,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:41,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:41,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-01 00:00:41,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-01 00:00:41,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-01 00:00:41,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-01 00:00:41,543 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-10-01 00:00:41,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:41,750 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-01 00:00:41,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-01 00:00:41,751 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-10-01 00:00:41,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:41,752 INFO L225 Difference]: With dead ends: 111 [2018-10-01 00:00:41,752 INFO L226 Difference]: Without dead ends: 110 [2018-10-01 00:00:41,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-01 00:00:41,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-01 00:00:41,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-01 00:00:41,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-01 00:00:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-01 00:00:41,756 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-10-01 00:00:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:41,757 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-01 00:00:41,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-01 00:00:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-01 00:00:41,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-01 00:00:41,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:41,758 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-10-01 00:00:41,758 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:41,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:41,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-10-01 00:00:41,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:41,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:41,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:41,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:41,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:43,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:43,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:43,054 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:43,207 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-01 00:00:43,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:43,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:45,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:45,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-10-01 00:00:45,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-01 00:00:45,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-01 00:00:45,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-01 00:00:45,182 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-10-01 00:00:45,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:45,387 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-01 00:00:45,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-01 00:00:45,387 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-10-01 00:00:45,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:45,388 INFO L225 Difference]: With dead ends: 113 [2018-10-01 00:00:45,388 INFO L226 Difference]: Without dead ends: 112 [2018-10-01 00:00:45,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-01 00:00:45,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-01 00:00:45,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-01 00:00:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-01 00:00:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-01 00:00:45,393 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-10-01 00:00:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:45,393 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-01 00:00:45,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-01 00:00:45,393 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-01 00:00:45,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-01 00:00:45,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:45,394 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-10-01 00:00:45,394 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:45,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:45,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-10-01 00:00:45,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:45,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:45,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:45,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:45,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:46,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:46,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:46,781 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:46,835 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-01 00:00:46,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:46,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:48,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:48,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-10-01 00:00:48,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-01 00:00:48,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-01 00:00:48,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-01 00:00:48,688 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-10-01 00:00:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:48,992 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-01 00:00:48,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-01 00:00:48,993 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-10-01 00:00:48,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:48,994 INFO L225 Difference]: With dead ends: 115 [2018-10-01 00:00:48,994 INFO L226 Difference]: Without dead ends: 114 [2018-10-01 00:00:48,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-01 00:00:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-01 00:00:48,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-01 00:00:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-01 00:00:49,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-01 00:00:49,000 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-10-01 00:00:49,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:49,000 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-01 00:00:49,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-01 00:00:49,001 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-01 00:00:49,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-01 00:00:49,001 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:49,001 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-10-01 00:00:49,002 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:49,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:49,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-10-01 00:00:49,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:49,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:49,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:49,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:49,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:50,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:50,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:50,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:50,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:52,523 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:52,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-01 00:00:52,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-01 00:00:52,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-01 00:00:52,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-01 00:00:52,526 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-10-01 00:00:52,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:52,954 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-01 00:00:52,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-01 00:00:52,954 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-10-01 00:00:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:52,955 INFO L225 Difference]: With dead ends: 117 [2018-10-01 00:00:52,955 INFO L226 Difference]: Without dead ends: 116 [2018-10-01 00:00:52,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-01 00:00:52,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-01 00:00:52,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-01 00:00:52,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-01 00:00:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-01 00:00:52,960 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-10-01 00:00:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:52,961 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-01 00:00:52,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-01 00:00:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-01 00:00:52,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-01 00:00:52,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:52,962 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-10-01 00:00:52,962 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:52,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:52,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-10-01 00:00:52,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:52,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:52,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:52,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:52,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:54,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:54,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:54,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:54,730 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:54,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:54,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:56,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:56,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-10-01 00:00:56,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-01 00:00:56,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-01 00:00:56,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-01 00:00:56,529 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-10-01 00:00:56,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:56,824 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-01 00:00:56,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-01 00:00:56,825 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-10-01 00:00:56,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:56,826 INFO L225 Difference]: With dead ends: 119 [2018-10-01 00:00:56,826 INFO L226 Difference]: Without dead ends: 118 [2018-10-01 00:00:56,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-01 00:00:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-01 00:00:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-01 00:00:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-01 00:00:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-01 00:00:56,833 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-10-01 00:00:56,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:56,833 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-01 00:00:56,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-01 00:00:56,833 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-01 00:00:56,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-01 00:00:56,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:56,834 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-10-01 00:00:56,834 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:56,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:56,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-10-01 00:00:56,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:56,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:56,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:56,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:56,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:58,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:58,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:58,356 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:58,415 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-01 00:00:58,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:58,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:00,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:00,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-10-01 00:01:00,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-01 00:01:00,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-01 00:01:00,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-10-01 00:01:00,533 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-10-01 00:01:00,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:00,793 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-01 00:01:00,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-01 00:01:00,793 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-10-01 00:01:00,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:00,794 INFO L225 Difference]: With dead ends: 121 [2018-10-01 00:01:00,794 INFO L226 Difference]: Without dead ends: 120 [2018-10-01 00:01:00,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-10-01 00:01:00,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-01 00:01:00,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-01 00:01:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-01 00:01:00,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-01 00:01:00,799 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-10-01 00:01:00,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:00,799 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-01 00:01:00,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-01 00:01:00,799 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-01 00:01:00,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-01 00:01:00,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:00,800 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-10-01 00:01:00,800 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:00,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:00,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-10-01 00:01:00,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:00,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:00,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:00,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:00,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:02,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:02,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:02,771 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:01:02,803 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:01:02,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:02,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:05,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:05,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-01 00:01:05,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-01 00:01:05,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-01 00:01:05,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-01 00:01:05,251 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-10-01 00:01:05,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:05,534 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-01 00:01:05,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-01 00:01:05,534 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-10-01 00:01:05,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:05,535 INFO L225 Difference]: With dead ends: 123 [2018-10-01 00:01:05,535 INFO L226 Difference]: Without dead ends: 122 [2018-10-01 00:01:05,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-01 00:01:05,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-01 00:01:05,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-01 00:01:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-01 00:01:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-01 00:01:05,540 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-10-01 00:01:05,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:05,540 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-01 00:01:05,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-01 00:01:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-01 00:01:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-01 00:01:05,541 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:05,541 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-10-01 00:01:05,542 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:05,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:05,542 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-10-01 00:01:05,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:05,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:05,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:05,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:05,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:07,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:07,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:07,252 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:01:07,317 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-01 00:01:07,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:07,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:09,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:09,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-10-01 00:01:09,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-01 00:01:09,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-01 00:01:09,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-01 00:01:09,491 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-10-01 00:01:09,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:09,830 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-01 00:01:09,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-01 00:01:09,830 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-10-01 00:01:09,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:09,831 INFO L225 Difference]: With dead ends: 125 [2018-10-01 00:01:09,831 INFO L226 Difference]: Without dead ends: 124 [2018-10-01 00:01:09,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-01 00:01:09,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-01 00:01:09,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-01 00:01:09,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-01 00:01:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-01 00:01:09,835 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-10-01 00:01:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:09,836 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-01 00:01:09,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-01 00:01:09,836 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-01 00:01:09,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-01 00:01:09,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:09,836 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-10-01 00:01:09,836 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:09,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:09,837 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-10-01 00:01:09,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:09,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:09,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:09,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:09,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:12,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:12,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:12,185 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:01:12,245 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-01 00:01:12,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:12,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:14,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:14,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-10-01 00:01:14,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-01 00:01:14,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-01 00:01:14,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-01 00:01:14,263 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-10-01 00:01:14,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:14,533 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-01 00:01:14,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-01 00:01:14,533 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-10-01 00:01:14,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:14,534 INFO L225 Difference]: With dead ends: 127 [2018-10-01 00:01:14,534 INFO L226 Difference]: Without dead ends: 126 [2018-10-01 00:01:14,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-01 00:01:14,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-01 00:01:14,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-01 00:01:14,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-01 00:01:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-01 00:01:14,539 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-10-01 00:01:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:14,539 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-01 00:01:14,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-01 00:01:14,540 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-01 00:01:14,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-01 00:01:14,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:14,540 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-10-01 00:01:14,541 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:14,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:14,541 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-10-01 00:01:14,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:14,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:14,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:14,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:14,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:16,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:16,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:16,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:16,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:18,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:18,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-01 00:01:18,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-01 00:01:18,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-01 00:01:18,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-10-01 00:01:18,567 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-10-01 00:01:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:18,861 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-01 00:01:18,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-01 00:01:18,861 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-10-01 00:01:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:18,862 INFO L225 Difference]: With dead ends: 129 [2018-10-01 00:01:18,863 INFO L226 Difference]: Without dead ends: 128 [2018-10-01 00:01:18,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-10-01 00:01:18,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-01 00:01:18,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-01 00:01:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-01 00:01:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-01 00:01:18,867 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-10-01 00:01:18,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:18,867 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-01 00:01:18,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-01 00:01:18,867 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-01 00:01:18,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-01 00:01:18,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:18,868 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-10-01 00:01:18,868 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:18,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:18,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-10-01 00:01:18,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:18,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:18,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:18,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:18,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:20,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:20,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:20,918 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:01:20,950 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:01:20,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:20,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:23,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:23,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-10-01 00:01:23,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-01 00:01:23,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-01 00:01:23,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-10-01 00:01:23,095 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-10-01 00:01:23,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:23,343 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-01 00:01:23,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-01 00:01:23,343 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-10-01 00:01:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:23,344 INFO L225 Difference]: With dead ends: 131 [2018-10-01 00:01:23,344 INFO L226 Difference]: Without dead ends: 130 [2018-10-01 00:01:23,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-10-01 00:01:23,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-01 00:01:23,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-01 00:01:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-01 00:01:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-10-01 00:01:23,348 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-10-01 00:01:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:23,349 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-10-01 00:01:23,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-01 00:01:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-10-01 00:01:23,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-01 00:01:23,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:23,350 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-10-01 00:01:23,350 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:23,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:23,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-10-01 00:01:23,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:23,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:23,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:23,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:23,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:25,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:25,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:25,360 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:25,427 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-01 00:01:25,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:25,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:27,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:27,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-10-01 00:01:27,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-01 00:01:27,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-01 00:01:27,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-10-01 00:01:27,660 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-10-01 00:01:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:27,975 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-01 00:01:27,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-01 00:01:27,975 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-10-01 00:01:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:27,976 INFO L225 Difference]: With dead ends: 133 [2018-10-01 00:01:27,977 INFO L226 Difference]: Without dead ends: 132 [2018-10-01 00:01:27,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-10-01 00:01:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-01 00:01:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-01 00:01:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-01 00:01:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-10-01 00:01:27,981 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-10-01 00:01:27,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:27,982 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-10-01 00:01:27,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-01 00:01:27,982 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-10-01 00:01:27,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-01 00:01:27,983 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:27,983 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-10-01 00:01:27,983 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:27,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:27,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-10-01 00:01:27,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:27,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:27,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:27,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:27,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:29,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:29,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:29,792 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:01:29,831 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:01:29,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:29,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:32,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:32,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-10-01 00:01:32,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-01 00:01:32,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-01 00:01:32,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-01 00:01:32,430 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-10-01 00:01:32,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:32,705 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-01 00:01:32,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-01 00:01:32,705 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-10-01 00:01:32,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:32,706 INFO L225 Difference]: With dead ends: 135 [2018-10-01 00:01:32,706 INFO L226 Difference]: Without dead ends: 134 [2018-10-01 00:01:32,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-01 00:01:32,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-01 00:01:32,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-10-01 00:01:32,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-01 00:01:32,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-01 00:01:32,712 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-10-01 00:01:32,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:32,713 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-01 00:01:32,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-01 00:01:32,713 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-01 00:01:32,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-01 00:01:32,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:32,714 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-10-01 00:01:32,714 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:32,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:32,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-10-01 00:01:32,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:32,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:32,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:32,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:32,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:34,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:34,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:34,632 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:01:34,704 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-01 00:01:34,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:34,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:38,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:38,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-10-01 00:01:38,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-01 00:01:38,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-01 00:01:38,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-01 00:01:38,208 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-10-01 00:01:38,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:38,544 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-01 00:01:38,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-01 00:01:38,545 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-10-01 00:01:38,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:38,546 INFO L225 Difference]: With dead ends: 137 [2018-10-01 00:01:38,546 INFO L226 Difference]: Without dead ends: 136 [2018-10-01 00:01:38,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-01 00:01:38,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-01 00:01:38,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-01 00:01:38,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-01 00:01:38,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-01 00:01:38,552 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-10-01 00:01:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:38,552 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-01 00:01:38,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-01 00:01:38,553 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-01 00:01:38,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-01 00:01:38,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:38,553 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-10-01 00:01:38,553 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:38,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:38,554 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-10-01 00:01:38,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:38,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:38,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:38,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:38,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:40,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:40,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:40,714 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:01:40,783 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-01 00:01:40,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:40,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:43,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:43,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-10-01 00:01:43,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-10-01 00:01:43,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-10-01 00:01:43,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-01 00:01:43,242 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-10-01 00:01:43,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:43,552 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-01 00:01:43,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-01 00:01:43,553 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-10-01 00:01:43,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:43,554 INFO L225 Difference]: With dead ends: 139 [2018-10-01 00:01:43,554 INFO L226 Difference]: Without dead ends: 138 [2018-10-01 00:01:43,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-01 00:01:43,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-01 00:01:43,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-01 00:01:43,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-01 00:01:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-01 00:01:43,558 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-10-01 00:01:43,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:43,559 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-01 00:01:43,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-10-01 00:01:43,559 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-01 00:01:43,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-01 00:01:43,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:43,559 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-10-01 00:01:43,560 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:43,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:43,560 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-10-01 00:01:43,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:43,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:43,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:43,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:43,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:45,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:45,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:45,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:45,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:48,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:48,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-10-01 00:01:48,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-01 00:01:48,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-01 00:01:48,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-10-01 00:01:48,310 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-10-01 00:01:48,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:48,642 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-01 00:01:48,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-01 00:01:48,643 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-10-01 00:01:48,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:48,643 INFO L225 Difference]: With dead ends: 141 [2018-10-01 00:01:48,644 INFO L226 Difference]: Without dead ends: 140 [2018-10-01 00:01:48,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-10-01 00:01:48,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-01 00:01:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-01 00:01:48,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-01 00:01:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-01 00:01:48,648 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-10-01 00:01:48,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:48,648 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-01 00:01:48,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-01 00:01:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-01 00:01:48,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-01 00:01:48,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:48,649 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-10-01 00:01:48,649 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:48,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:48,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-10-01 00:01:48,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:48,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:48,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:48,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:48,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:50,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:50,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:50,988 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:01:51,025 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:01:51,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:51,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:53,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:53,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-10-01 00:01:53,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-01 00:01:53,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-01 00:01:53,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-01 00:01:53,629 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-10-01 00:01:53,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:53,938 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-01 00:01:53,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-01 00:01:53,939 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-10-01 00:01:53,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:53,940 INFO L225 Difference]: With dead ends: 143 [2018-10-01 00:01:53,940 INFO L226 Difference]: Without dead ends: 142 [2018-10-01 00:01:53,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-01 00:01:53,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-01 00:01:53,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-01 00:01:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-01 00:01:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-10-01 00:01:53,945 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-10-01 00:01:53,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:53,945 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-10-01 00:01:53,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-01 00:01:53,945 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-10-01 00:01:53,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-01 00:01:53,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:53,946 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-10-01 00:01:53,947 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:53,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:53,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-10-01 00:01:53,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:53,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:53,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:53,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:53,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:56,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:56,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:56,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:56,431 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-01 00:01:56,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:56,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:59,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:59,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-10-01 00:01:59,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-01 00:01:59,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-01 00:01:59,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-01 00:01:59,042 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-10-01 00:01:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:59,407 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-01 00:01:59,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-01 00:01:59,407 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-10-01 00:01:59,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:59,408 INFO L225 Difference]: With dead ends: 145 [2018-10-01 00:01:59,409 INFO L226 Difference]: Without dead ends: 144 [2018-10-01 00:01:59,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-01 00:01:59,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-01 00:01:59,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-01 00:01:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-01 00:01:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-10-01 00:01:59,414 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-10-01 00:01:59,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:59,414 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-10-01 00:01:59,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-01 00:01:59,414 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-10-01 00:01:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-01 00:01:59,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:59,415 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-10-01 00:01:59,415 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:59,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:59,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-10-01 00:01:59,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:59,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:59,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:59,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:59,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:02,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:02,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:02,011 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:02:02,043 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:02:02,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:02,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:05,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:05,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-10-01 00:02:05,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-01 00:02:05,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-01 00:02:05,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-10-01 00:02:05,039 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-10-01 00:02:05,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:05,423 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-01 00:02:05,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-01 00:02:05,423 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-10-01 00:02:05,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:05,424 INFO L225 Difference]: With dead ends: 147 [2018-10-01 00:02:05,424 INFO L226 Difference]: Without dead ends: 146 [2018-10-01 00:02:05,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-10-01 00:02:05,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-01 00:02:05,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-01 00:02:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-01 00:02:05,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-01 00:02:05,430 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-10-01 00:02:05,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:05,430 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-01 00:02:05,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-01 00:02:05,430 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-01 00:02:05,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-01 00:02:05,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:05,431 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-10-01 00:02:05,431 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:05,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:05,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-10-01 00:02:05,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:05,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:05,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:05,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:05,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:07,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:07,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:07,842 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:02:07,987 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-01 00:02:07,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:07,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:11,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:11,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-10-01 00:02:11,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-01 00:02:11,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-01 00:02:11,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-10-01 00:02:11,239 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-10-01 00:02:11,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:11,630 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-01 00:02:11,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-01 00:02:11,630 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-10-01 00:02:11,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:11,632 INFO L225 Difference]: With dead ends: 149 [2018-10-01 00:02:11,632 INFO L226 Difference]: Without dead ends: 148 [2018-10-01 00:02:11,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-10-01 00:02:11,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-01 00:02:11,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-01 00:02:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-01 00:02:11,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-01 00:02:11,638 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-10-01 00:02:11,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:11,638 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-01 00:02:11,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-01 00:02:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-01 00:02:11,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-01 00:02:11,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:11,639 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-10-01 00:02:11,639 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:11,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:11,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-10-01 00:02:11,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:11,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:11,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:11,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:11,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:13,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:13,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:13,944 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:02:14,031 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-01 00:02:14,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:14,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:17,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:17,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-10-01 00:02:17,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-10-01 00:02:17,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-10-01 00:02:17,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-10-01 00:02:17,261 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-10-01 00:02:17,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:17,884 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-01 00:02:17,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-01 00:02:17,885 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-10-01 00:02:17,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:17,886 INFO L225 Difference]: With dead ends: 151 [2018-10-01 00:02:17,886 INFO L226 Difference]: Without dead ends: 150 [2018-10-01 00:02:17,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-10-01 00:02:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-01 00:02:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-01 00:02:17,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-01 00:02:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-10-01 00:02:17,893 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-10-01 00:02:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:17,894 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-10-01 00:02:17,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-10-01 00:02:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-10-01 00:02:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-01 00:02:17,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:17,895 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-10-01 00:02:17,895 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:17,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:17,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-10-01 00:02:17,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:17,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:17,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:17,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:17,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:20,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:20,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:20,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:20,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:23,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:23,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-10-01 00:02:23,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-01 00:02:23,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-01 00:02:23,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-10-01 00:02:23,573 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-10-01 00:02:23,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:23,943 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-01 00:02:23,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-01 00:02:23,944 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-10-01 00:02:23,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:23,945 INFO L225 Difference]: With dead ends: 153 [2018-10-01 00:02:23,945 INFO L226 Difference]: Without dead ends: 152 [2018-10-01 00:02:23,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10804 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-10-01 00:02:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-01 00:02:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-10-01 00:02:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-01 00:02:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-01 00:02:23,950 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-10-01 00:02:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:23,950 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-01 00:02:23,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-01 00:02:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-01 00:02:23,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-01 00:02:23,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:23,951 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-10-01 00:02:23,951 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:23,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:23,951 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-10-01 00:02:23,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:23,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:23,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:23,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:23,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:26,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:26,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:26,611 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:02:26,649 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:02:26,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:26,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:29,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:29,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-10-01 00:02:29,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-10-01 00:02:29,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-10-01 00:02:29,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-10-01 00:02:29,690 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-10-01 00:02:30,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:30,078 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-01 00:02:30,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-01 00:02:30,079 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-10-01 00:02:30,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:30,080 INFO L225 Difference]: With dead ends: 155 [2018-10-01 00:02:30,080 INFO L226 Difference]: Without dead ends: 154 [2018-10-01 00:02:30,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11100 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-10-01 00:02:30,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-01 00:02:30,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-01 00:02:30,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-01 00:02:30,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-10-01 00:02:30,084 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-10-01 00:02:30,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:30,084 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-10-01 00:02:30,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-10-01 00:02:30,084 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-10-01 00:02:30,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-01 00:02:30,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:30,085 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-10-01 00:02:30,085 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:30,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:30,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-10-01 00:02:30,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:30,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:30,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:30,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:30,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:32,760 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:32,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:32,767 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:02:32,854 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-01 00:02:32,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:32,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:35,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:35,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-10-01 00:02:35,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-01 00:02:35,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-01 00:02:35,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-10-01 00:02:35,932 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-10-01 00:02:36,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:36,343 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-01 00:02:36,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-01 00:02:36,343 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-10-01 00:02:36,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:36,344 INFO L225 Difference]: With dead ends: 157 [2018-10-01 00:02:36,344 INFO L226 Difference]: Without dead ends: 156 [2018-10-01 00:02:36,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-10-01 00:02:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-01 00:02:36,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-01 00:02:36,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-01 00:02:36,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-10-01 00:02:36,350 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-10-01 00:02:36,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:36,350 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-10-01 00:02:36,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-01 00:02:36,350 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-10-01 00:02:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-01 00:02:36,351 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:36,351 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-10-01 00:02:36,351 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:36,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:36,351 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-10-01 00:02:36,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:36,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:36,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:36,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:36,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:39,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:39,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:39,149 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:02:39,191 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:02:39,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:39,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:42,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:42,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-10-01 00:02:42,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-10-01 00:02:42,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-10-01 00:02:42,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-10-01 00:02:42,658 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-10-01 00:02:43,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:43,003 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-01 00:02:43,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-01 00:02:43,003 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-10-01 00:02:43,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:43,004 INFO L225 Difference]: With dead ends: 159 [2018-10-01 00:02:43,004 INFO L226 Difference]: Without dead ends: 158 [2018-10-01 00:02:43,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-10-01 00:02:43,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-01 00:02:43,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-01 00:02:43,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-01 00:02:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-01 00:02:43,009 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-10-01 00:02:43,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:43,009 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-01 00:02:43,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-10-01 00:02:43,009 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-01 00:02:43,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-01 00:02:43,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:43,010 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-10-01 00:02:43,010 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:43,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:43,010 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-10-01 00:02:43,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:43,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:43,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:43,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:43,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:45,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:45,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:45,593 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:02:45,689 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-01 00:02:45,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:45,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:49,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:49,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-10-01 00:02:49,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-01 00:02:49,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-01 00:02:49,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-10-01 00:02:49,231 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-10-01 00:02:49,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:49,606 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-01 00:02:49,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-01 00:02:49,607 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-10-01 00:02:49,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:49,608 INFO L225 Difference]: With dead ends: 161 [2018-10-01 00:02:49,608 INFO L226 Difference]: Without dead ends: 160 [2018-10-01 00:02:49,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-10-01 00:02:49,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-01 00:02:49,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-01 00:02:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-01 00:02:49,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-01 00:02:49,615 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-10-01 00:02:49,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:49,615 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-01 00:02:49,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-01 00:02:49,615 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-01 00:02:49,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-01 00:02:49,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:49,616 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-10-01 00:02:49,616 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:49,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:49,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-10-01 00:02:49,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:49,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:49,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:49,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:49,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:52,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:52,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:52,617 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:02:52,724 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-01 00:02:52,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:52,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:56,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:56,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-10-01 00:02:56,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-10-01 00:02:56,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-10-01 00:02:56,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-10-01 00:02:56,036 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-10-01 00:02:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:56,470 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-01 00:02:56,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-01 00:02:56,470 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-10-01 00:02:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:56,471 INFO L225 Difference]: With dead ends: 163 [2018-10-01 00:02:56,471 INFO L226 Difference]: Without dead ends: 162 [2018-10-01 00:02:56,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-10-01 00:02:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-01 00:02:56,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-01 00:02:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-01 00:02:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-10-01 00:02:56,476 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-10-01 00:02:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:56,476 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-10-01 00:02:56,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-10-01 00:02:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-10-01 00:02:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-01 00:02:56,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:56,477 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-10-01 00:02:56,477 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:56,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:56,478 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-10-01 00:02:56,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:56,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:56,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:56,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:56,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:59,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:59,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:59,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:59,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:03,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:03,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-10-01 00:03:03,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-01 00:03:03,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-01 00:03:03,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-10-01 00:03:03,388 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-10-01 00:03:03,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:03,783 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-01 00:03:03,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-01 00:03:03,783 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-10-01 00:03:03,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:03,784 INFO L225 Difference]: With dead ends: 165 [2018-10-01 00:03:03,785 INFO L226 Difference]: Without dead ends: 164 [2018-10-01 00:03:03,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-10-01 00:03:03,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-01 00:03:03,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-01 00:03:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-01 00:03:03,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-10-01 00:03:03,790 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-10-01 00:03:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:03,791 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-10-01 00:03:03,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-01 00:03:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-10-01 00:03:03,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-01 00:03:03,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:03,792 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-10-01 00:03:03,792 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:03,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:03,792 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-10-01 00:03:03,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:03,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:03,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:03,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:03,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:06,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:06,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:06,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:03:06,643 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:03:06,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:06,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:10,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:10,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 162 [2018-10-01 00:03:10,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-10-01 00:03:10,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-10-01 00:03:10,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10126, Invalid=16606, Unknown=0, NotChecked=0, Total=26732 [2018-10-01 00:03:10,469 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 164 states. [2018-10-01 00:03:10,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:10,884 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-01 00:03:10,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-01 00:03:10,885 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 163 [2018-10-01 00:03:10,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:10,886 INFO L225 Difference]: With dead ends: 167 [2018-10-01 00:03:10,886 INFO L226 Difference]: Without dead ends: 166 [2018-10-01 00:03:10,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12960 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=10126, Invalid=16606, Unknown=0, NotChecked=0, Total=26732 [2018-10-01 00:03:10,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-01 00:03:10,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-01 00:03:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-01 00:03:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-10-01 00:03:10,891 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2018-10-01 00:03:10,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:10,892 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-10-01 00:03:10,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-10-01 00:03:10,892 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-10-01 00:03:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-01 00:03:10,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:10,892 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1] [2018-10-01 00:03:10,893 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:10,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:10,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1262747198, now seen corresponding path program 81 times [2018-10-01 00:03:10,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:10,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:10,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:10,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:10,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:13,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:13,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:13,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:03:14,034 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-01 00:03:14,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:14,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:17,949 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:17,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 164 [2018-10-01 00:03:17,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-10-01 00:03:17,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-10-01 00:03:17,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10374, Invalid=17016, Unknown=0, NotChecked=0, Total=27390 [2018-10-01 00:03:17,952 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 166 states. [2018-10-01 00:03:18,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:18,354 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-01 00:03:18,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-01 00:03:18,354 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 165 [2018-10-01 00:03:18,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:18,355 INFO L225 Difference]: With dead ends: 169 [2018-10-01 00:03:18,355 INFO L226 Difference]: Without dead ends: 168 [2018-10-01 00:03:18,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13284 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=10374, Invalid=17016, Unknown=0, NotChecked=0, Total=27390 [2018-10-01 00:03:18,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-01 00:03:18,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-10-01 00:03:18,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-01 00:03:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-10-01 00:03:18,360 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 165 [2018-10-01 00:03:18,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:18,360 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-10-01 00:03:18,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-10-01 00:03:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-10-01 00:03:18,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-01 00:03:18,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:18,361 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1] [2018-10-01 00:03:18,361 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:18,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:18,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1975688580, now seen corresponding path program 82 times [2018-10-01 00:03:18,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:18,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:18,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:18,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:18,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:21,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:21,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:21,293 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:03:21,341 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:03:21,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:21,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:25,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:25,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 166 [2018-10-01 00:03:25,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-10-01 00:03:25,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-10-01 00:03:25,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10625, Invalid=17431, Unknown=0, NotChecked=0, Total=28056 [2018-10-01 00:03:25,289 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 168 states. [2018-10-01 00:03:25,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:25,706 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-10-01 00:03:25,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-01 00:03:25,707 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 167 [2018-10-01 00:03:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:25,708 INFO L225 Difference]: With dead ends: 171 [2018-10-01 00:03:25,708 INFO L226 Difference]: Without dead ends: 170 [2018-10-01 00:03:25,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13612 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=10625, Invalid=17431, Unknown=0, NotChecked=0, Total=28056 [2018-10-01 00:03:25,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-01 00:03:25,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-10-01 00:03:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-01 00:03:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-10-01 00:03:25,714 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 167 [2018-10-01 00:03:25,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:25,714 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-10-01 00:03:25,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-10-01 00:03:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-10-01 00:03:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-10-01 00:03:25,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:25,715 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1] [2018-10-01 00:03:25,715 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:25,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:25,715 INFO L82 PathProgramCache]: Analyzing trace with hash 261181638, now seen corresponding path program 83 times [2018-10-01 00:03:25,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:25,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:25,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:25,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:25,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:28,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:28,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:28,995 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:03:29,102 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-01 00:03:29,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:29,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:33,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:33,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 168 [2018-10-01 00:03:33,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-10-01 00:03:33,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-10-01 00:03:33,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10879, Invalid=17851, Unknown=0, NotChecked=0, Total=28730 [2018-10-01 00:03:33,187 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 170 states. [2018-10-01 00:03:33,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:33,600 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-10-01 00:03:33,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-01 00:03:33,600 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 169 [2018-10-01 00:03:33,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:33,601 INFO L225 Difference]: With dead ends: 173 [2018-10-01 00:03:33,601 INFO L226 Difference]: Without dead ends: 172 [2018-10-01 00:03:33,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13944 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=10879, Invalid=17851, Unknown=0, NotChecked=0, Total=28730 [2018-10-01 00:03:33,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-10-01 00:03:33,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-10-01 00:03:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-01 00:03:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-10-01 00:03:33,606 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 169 [2018-10-01 00:03:33,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:33,606 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-10-01 00:03:33,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-10-01 00:03:33,606 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-10-01 00:03:33,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-01 00:03:33,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:33,607 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1] [2018-10-01 00:03:33,607 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:33,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:33,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1887452040, now seen corresponding path program 84 times [2018-10-01 00:03:33,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:33,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:33,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:33,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:33,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:36,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:36,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:36,737 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:03:36,835 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-01 00:03:36,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:36,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:41,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:41,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 170 [2018-10-01 00:03:41,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-10-01 00:03:41,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-10-01 00:03:41,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11136, Invalid=18276, Unknown=0, NotChecked=0, Total=29412 [2018-10-01 00:03:41,005 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 172 states. [2018-10-01 00:03:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:41,485 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-01 00:03:41,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-01 00:03:41,486 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 171 [2018-10-01 00:03:41,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:41,486 INFO L225 Difference]: With dead ends: 175 [2018-10-01 00:03:41,486 INFO L226 Difference]: Without dead ends: 174 [2018-10-01 00:03:41,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14280 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=11136, Invalid=18276, Unknown=0, NotChecked=0, Total=29412 [2018-10-01 00:03:41,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-01 00:03:41,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-10-01 00:03:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-01 00:03:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-10-01 00:03:41,492 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 171 [2018-10-01 00:03:41,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:41,493 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-10-01 00:03:41,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-10-01 00:03:41,493 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-10-01 00:03:41,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-01 00:03:41,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:41,494 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1] [2018-10-01 00:03:41,494 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:41,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:41,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1365212618, now seen corresponding path program 85 times [2018-10-01 00:03:41,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:41,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:41,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:41,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:41,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:44,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:44,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:44,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:44,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:49,079 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:49,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 172 [2018-10-01 00:03:49,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-10-01 00:03:49,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-10-01 00:03:49,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11396, Invalid=18706, Unknown=0, NotChecked=0, Total=30102 [2018-10-01 00:03:49,083 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 174 states. [2018-10-01 00:03:49,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:49,516 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-01 00:03:49,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-01 00:03:49,517 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 173 [2018-10-01 00:03:49,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:49,518 INFO L225 Difference]: With dead ends: 177 [2018-10-01 00:03:49,518 INFO L226 Difference]: Without dead ends: 176 [2018-10-01 00:03:49,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14620 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=11396, Invalid=18706, Unknown=0, NotChecked=0, Total=30102 [2018-10-01 00:03:49,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-01 00:03:49,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-10-01 00:03:49,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-01 00:03:49,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-10-01 00:03:49,525 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 173 [2018-10-01 00:03:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:49,526 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-10-01 00:03:49,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-10-01 00:03:49,526 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-10-01 00:03:49,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-01 00:03:49,527 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:49,527 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1] [2018-10-01 00:03:49,527 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:49,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:49,527 INFO L82 PathProgramCache]: Analyzing trace with hash 2004301708, now seen corresponding path program 86 times [2018-10-01 00:03:49,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:49,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:49,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:49,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:49,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:52,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:52,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:52,746 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:03:52,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:03:52,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:52,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:56,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:56,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 174 [2018-10-01 00:03:56,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-10-01 00:03:56,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-10-01 00:03:56,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11659, Invalid=19141, Unknown=0, NotChecked=0, Total=30800 [2018-10-01 00:03:56,941 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 176 states. [2018-10-01 00:03:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:57,346 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-10-01 00:03:57,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-01 00:03:57,347 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 175 [2018-10-01 00:03:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:57,348 INFO L225 Difference]: With dead ends: 179 [2018-10-01 00:03:57,348 INFO L226 Difference]: Without dead ends: 178 [2018-10-01 00:03:57,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14964 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=11659, Invalid=19141, Unknown=0, NotChecked=0, Total=30800 [2018-10-01 00:03:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-10-01 00:03:57,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-10-01 00:03:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-01 00:03:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-10-01 00:03:57,352 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 175 [2018-10-01 00:03:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:57,352 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-10-01 00:03:57,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-10-01 00:03:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-10-01 00:03:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-01 00:03:57,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:57,353 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1] [2018-10-01 00:03:57,353 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:57,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:57,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1988593870, now seen corresponding path program 87 times [2018-10-01 00:03:57,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:57,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:57,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:57,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:57,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:01,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:01,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:01,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:04:01,149 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-01 00:04:01,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:01,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:05,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:05,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 176 [2018-10-01 00:04:05,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-10-01 00:04:05,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-10-01 00:04:05,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11925, Invalid=19581, Unknown=0, NotChecked=0, Total=31506 [2018-10-01 00:04:05,438 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 178 states. [2018-10-01 00:04:05,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:05,885 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-01 00:04:05,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-01 00:04:05,885 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 177 [2018-10-01 00:04:05,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:05,887 INFO L225 Difference]: With dead ends: 181 [2018-10-01 00:04:05,887 INFO L226 Difference]: Without dead ends: 180 [2018-10-01 00:04:05,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15312 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=11925, Invalid=19581, Unknown=0, NotChecked=0, Total=31506 [2018-10-01 00:04:05,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-01 00:04:05,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-10-01 00:04:05,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-10-01 00:04:05,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2018-10-01 00:04:05,892 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 177 [2018-10-01 00:04:05,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:05,893 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2018-10-01 00:04:05,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-10-01 00:04:05,893 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2018-10-01 00:04:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-01 00:04:05,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:05,893 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1] [2018-10-01 00:04:05,894 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:05,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:05,894 INFO L82 PathProgramCache]: Analyzing trace with hash -221736560, now seen corresponding path program 88 times [2018-10-01 00:04:05,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:05,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:05,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:05,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:05,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:09,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:09,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:09,470 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:04:09,522 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:04:09,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:09,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:13,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:13,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 178 [2018-10-01 00:04:13,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-10-01 00:04:13,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-10-01 00:04:13,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12194, Invalid=20026, Unknown=0, NotChecked=0, Total=32220 [2018-10-01 00:04:13,717 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand 180 states. [2018-10-01 00:04:14,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:14,239 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-10-01 00:04:14,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-01 00:04:14,239 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 179 [2018-10-01 00:04:14,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:14,240 INFO L225 Difference]: With dead ends: 183 [2018-10-01 00:04:14,240 INFO L226 Difference]: Without dead ends: 182 [2018-10-01 00:04:14,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15664 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=12194, Invalid=20026, Unknown=0, NotChecked=0, Total=32220 [2018-10-01 00:04:14,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-01 00:04:14,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-10-01 00:04:14,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-01 00:04:14,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-10-01 00:04:14,245 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 179 [2018-10-01 00:04:14,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:14,245 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-10-01 00:04:14,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-10-01 00:04:14,245 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-10-01 00:04:14,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-01 00:04:14,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:14,246 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1] [2018-10-01 00:04:14,246 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:14,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:14,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1659531730, now seen corresponding path program 89 times [2018-10-01 00:04:14,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:14,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:14,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:14,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:14,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:17,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:17,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:17,684 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:04:17,810 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-01 00:04:17,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:17,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:22,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:22,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 180 [2018-10-01 00:04:22,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-10-01 00:04:22,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-10-01 00:04:22,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12466, Invalid=20476, Unknown=0, NotChecked=0, Total=32942 [2018-10-01 00:04:22,290 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 182 states. [2018-10-01 00:04:22,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:22,802 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-10-01 00:04:22,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-01 00:04:22,802 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 181 [2018-10-01 00:04:22,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:22,803 INFO L225 Difference]: With dead ends: 185 [2018-10-01 00:04:22,804 INFO L226 Difference]: Without dead ends: 184 [2018-10-01 00:04:22,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16020 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=12466, Invalid=20476, Unknown=0, NotChecked=0, Total=32942 [2018-10-01 00:04:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-10-01 00:04:22,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-10-01 00:04:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-01 00:04:22,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-10-01 00:04:22,809 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 181 [2018-10-01 00:04:22,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:22,809 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-10-01 00:04:22,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-10-01 00:04:22,809 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-10-01 00:04:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-01 00:04:22,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:22,810 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1] [2018-10-01 00:04:22,810 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:22,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:22,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1377126804, now seen corresponding path program 90 times [2018-10-01 00:04:22,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:22,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:22,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:22,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:22,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:26,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:26,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:26,609 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:04:26,716 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-01 00:04:26,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:26,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:31,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:31,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 182 [2018-10-01 00:04:31,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-10-01 00:04:31,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-10-01 00:04:31,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12741, Invalid=20931, Unknown=0, NotChecked=0, Total=33672 [2018-10-01 00:04:31,314 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 184 states. [2018-10-01 00:04:31,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:31,817 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-01 00:04:31,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-01 00:04:31,817 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 183 [2018-10-01 00:04:31,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:31,818 INFO L225 Difference]: With dead ends: 187 [2018-10-01 00:04:31,818 INFO L226 Difference]: Without dead ends: 186 [2018-10-01 00:04:31,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16380 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=12741, Invalid=20931, Unknown=0, NotChecked=0, Total=33672 [2018-10-01 00:04:31,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-01 00:04:31,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-10-01 00:04:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-10-01 00:04:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2018-10-01 00:04:31,825 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 183 [2018-10-01 00:04:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:31,825 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2018-10-01 00:04:31,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-10-01 00:04:31,826 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2018-10-01 00:04:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-01 00:04:31,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:31,827 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1] [2018-10-01 00:04:31,827 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:31,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:31,827 INFO L82 PathProgramCache]: Analyzing trace with hash 568932566, now seen corresponding path program 91 times [2018-10-01 00:04:31,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:31,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:31,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:31,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:31,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:35,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:35,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:35,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:35,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:40,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:40,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 184 [2018-10-01 00:04:40,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-10-01 00:04:40,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-10-01 00:04:40,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13019, Invalid=21391, Unknown=0, NotChecked=0, Total=34410 [2018-10-01 00:04:40,431 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand 186 states. [2018-10-01 00:04:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:40,940 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-01 00:04:40,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-01 00:04:40,940 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 185 [2018-10-01 00:04:40,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:40,941 INFO L225 Difference]: With dead ends: 189 [2018-10-01 00:04:40,941 INFO L226 Difference]: Without dead ends: 188 [2018-10-01 00:04:40,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16744 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=13019, Invalid=21391, Unknown=0, NotChecked=0, Total=34410 [2018-10-01 00:04:40,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-10-01 00:04:40,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-10-01 00:04:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-10-01 00:04:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-10-01 00:04:40,947 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 185 [2018-10-01 00:04:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:40,947 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-10-01 00:04:40,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-10-01 00:04:40,947 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-10-01 00:04:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-01 00:04:40,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:40,948 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1] [2018-10-01 00:04:40,949 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:40,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:40,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1283350424, now seen corresponding path program 92 times [2018-10-01 00:04:40,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:40,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:40,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:40,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:40,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:44,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:44,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:44,792 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:04:44,839 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:04:44,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:44,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:49,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:49,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 186 [2018-10-01 00:04:49,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-10-01 00:04:49,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-10-01 00:04:49,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13300, Invalid=21856, Unknown=0, NotChecked=0, Total=35156 [2018-10-01 00:04:49,354 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 188 states. [2018-10-01 00:04:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:49,928 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-10-01 00:04:49,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-01 00:04:49,928 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 187 [2018-10-01 00:04:49,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:49,929 INFO L225 Difference]: With dead ends: 191 [2018-10-01 00:04:49,929 INFO L226 Difference]: Without dead ends: 190 [2018-10-01 00:04:49,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17112 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=13300, Invalid=21856, Unknown=0, NotChecked=0, Total=35156 [2018-10-01 00:04:49,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-01 00:04:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-10-01 00:04:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-01 00:04:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2018-10-01 00:04:49,934 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 187 [2018-10-01 00:04:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:49,934 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2018-10-01 00:04:49,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-10-01 00:04:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2018-10-01 00:04:49,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-10-01 00:04:49,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:49,935 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1] [2018-10-01 00:04:49,935 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:49,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:49,935 INFO L82 PathProgramCache]: Analyzing trace with hash 644144602, now seen corresponding path program 93 times [2018-10-01 00:04:49,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:49,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:49,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:49,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:49,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:53,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:53,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:53,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:04:53,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-01 00:04:53,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:53,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:58,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:58,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 188 [2018-10-01 00:04:58,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-10-01 00:04:58,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-10-01 00:04:58,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13584, Invalid=22326, Unknown=0, NotChecked=0, Total=35910 [2018-10-01 00:04:58,697 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand 190 states. [2018-10-01 00:04:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:59,181 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-01 00:04:59,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-01 00:04:59,181 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 189 [2018-10-01 00:04:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:59,182 INFO L225 Difference]: With dead ends: 193 [2018-10-01 00:04:59,182 INFO L226 Difference]: Without dead ends: 192 [2018-10-01 00:04:59,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17484 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=13584, Invalid=22326, Unknown=0, NotChecked=0, Total=35910 [2018-10-01 00:04:59,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-10-01 00:04:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-10-01 00:04:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-01 00:04:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2018-10-01 00:04:59,188 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 189 [2018-10-01 00:04:59,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:59,188 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2018-10-01 00:04:59,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-10-01 00:04:59,188 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2018-10-01 00:04:59,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-01 00:04:59,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:59,189 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1] [2018-10-01 00:04:59,189 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:59,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:59,190 INFO L82 PathProgramCache]: Analyzing trace with hash 547672988, now seen corresponding path program 94 times [2018-10-01 00:04:59,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:59,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:59,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:59,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:59,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:03,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:03,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:03,235 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:03,286 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:03,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:03,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:08,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:08,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 190 [2018-10-01 00:05:08,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-10-01 00:05:08,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-10-01 00:05:08,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13871, Invalid=22801, Unknown=0, NotChecked=0, Total=36672 [2018-10-01 00:05:08,166 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 192 states. [2018-10-01 00:05:08,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:08,626 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-10-01 00:05:08,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-01 00:05:08,626 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 191 [2018-10-01 00:05:08,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:08,627 INFO L225 Difference]: With dead ends: 195 [2018-10-01 00:05:08,627 INFO L226 Difference]: Without dead ends: 194 [2018-10-01 00:05:08,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17860 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=13871, Invalid=22801, Unknown=0, NotChecked=0, Total=36672 [2018-10-01 00:05:08,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-01 00:05:08,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-10-01 00:05:08,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-01 00:05:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-10-01 00:05:08,633 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 191 [2018-10-01 00:05:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:08,634 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-10-01 00:05:08,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-10-01 00:05:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-10-01 00:05:08,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-01 00:05:08,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:08,635 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1] [2018-10-01 00:05:08,635 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:08,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:08,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1967234850, now seen corresponding path program 95 times [2018-10-01 00:05:08,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:08,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:08,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:08,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:08,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:12,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:12,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:12,778 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:12,919 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-01 00:05:12,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:12,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:18,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:18,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:18,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 192 [2018-10-01 00:05:18,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-10-01 00:05:18,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-10-01 00:05:18,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14161, Invalid=23281, Unknown=0, NotChecked=0, Total=37442 [2018-10-01 00:05:18,101 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 194 states. [2018-10-01 00:05:18,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:18,619 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-01 00:05:18,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-01 00:05:18,620 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 193 [2018-10-01 00:05:18,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:18,621 INFO L225 Difference]: With dead ends: 197 [2018-10-01 00:05:18,621 INFO L226 Difference]: Without dead ends: 196 [2018-10-01 00:05:18,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18240 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=14161, Invalid=23281, Unknown=0, NotChecked=0, Total=37442 [2018-10-01 00:05:18,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-01 00:05:18,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-10-01 00:05:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-01 00:05:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-10-01 00:05:18,626 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 193 [2018-10-01 00:05:18,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:18,626 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-10-01 00:05:18,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-10-01 00:05:18,626 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-10-01 00:05:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-01 00:05:18,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:18,627 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1] [2018-10-01 00:05:18,627 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:18,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:18,627 INFO L82 PathProgramCache]: Analyzing trace with hash -727079520, now seen corresponding path program 96 times [2018-10-01 00:05:18,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:18,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:18,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:18,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:18,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:22,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:22,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:22,885 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:23,006 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-01 00:05:23,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:23,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:28,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:28,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 194 [2018-10-01 00:05:28,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-10-01 00:05:28,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-10-01 00:05:28,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14454, Invalid=23766, Unknown=0, NotChecked=0, Total=38220 [2018-10-01 00:05:28,250 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 196 states. [2018-10-01 00:05:28,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:28,798 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-01 00:05:28,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-01 00:05:28,798 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 195 [2018-10-01 00:05:28,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:28,799 INFO L225 Difference]: With dead ends: 199 [2018-10-01 00:05:28,799 INFO L226 Difference]: Without dead ends: 198 [2018-10-01 00:05:28,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18624 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=14454, Invalid=23766, Unknown=0, NotChecked=0, Total=38220 [2018-10-01 00:05:28,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-01 00:05:28,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-10-01 00:05:28,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-10-01 00:05:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-10-01 00:05:28,805 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 195 [2018-10-01 00:05:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:28,805 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-10-01 00:05:28,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-10-01 00:05:28,805 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-10-01 00:05:28,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-01 00:05:28,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:28,806 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1] [2018-10-01 00:05:28,807 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:28,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:28,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1356251618, now seen corresponding path program 97 times [2018-10-01 00:05:28,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:28,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:28,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:28,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:28,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:33,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:33,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:33,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:33,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:38,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:38,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 196 [2018-10-01 00:05:38,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-10-01 00:05:38,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-10-01 00:05:38,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14750, Invalid=24256, Unknown=0, NotChecked=0, Total=39006 [2018-10-01 00:05:38,448 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 198 states. [2018-10-01 00:05:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:38,997 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-10-01 00:05:38,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-01 00:05:38,997 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 197 [2018-10-01 00:05:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:38,998 INFO L225 Difference]: With dead ends: 201 [2018-10-01 00:05:38,998 INFO L226 Difference]: Without dead ends: 200 [2018-10-01 00:05:38,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19012 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=14750, Invalid=24256, Unknown=0, NotChecked=0, Total=39006 [2018-10-01 00:05:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-10-01 00:05:39,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-10-01 00:05:39,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-01 00:05:39,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2018-10-01 00:05:39,003 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 197 [2018-10-01 00:05:39,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:39,003 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2018-10-01 00:05:39,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 198 states. [2018-10-01 00:05:39,004 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2018-10-01 00:05:39,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-01 00:05:39,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:39,004 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1] [2018-10-01 00:05:39,005 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:39,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:39,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1982715300, now seen corresponding path program 98 times [2018-10-01 00:05:39,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:39,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:39,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:39,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:39,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:43,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:43,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:43,249 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:43,299 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:43,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:43,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:48,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:48,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 198 [2018-10-01 00:05:48,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 200 states [2018-10-01 00:05:48,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2018-10-01 00:05:48,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15049, Invalid=24751, Unknown=0, NotChecked=0, Total=39800 [2018-10-01 00:05:48,674 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 200 states. [2018-10-01 00:05:49,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:49,150 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-10-01 00:05:49,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-01 00:05:49,151 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 199 [2018-10-01 00:05:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:49,152 INFO L225 Difference]: With dead ends: 203 [2018-10-01 00:05:49,152 INFO L226 Difference]: Without dead ends: 202 [2018-10-01 00:05:49,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19404 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=15049, Invalid=24751, Unknown=0, NotChecked=0, Total=39800 [2018-10-01 00:05:49,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-10-01 00:05:49,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-10-01 00:05:49,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-10-01 00:05:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2018-10-01 00:05:49,158 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 199 [2018-10-01 00:05:49,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:49,158 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2018-10-01 00:05:49,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 200 states. [2018-10-01 00:05:49,158 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2018-10-01 00:05:49,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-01 00:05:49,159 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:49,159 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1] [2018-10-01 00:05:49,159 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:49,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:49,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1576075034, now seen corresponding path program 99 times [2018-10-01 00:05:49,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:49,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:49,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:49,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:49,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:53,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:53,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:53,529 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:53,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-10-01 00:05:53,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:53,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:58,996 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:58,996 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 200 [2018-10-01 00:05:58,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 202 states [2018-10-01 00:05:58,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2018-10-01 00:05:59,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15351, Invalid=25251, Unknown=0, NotChecked=0, Total=40602 [2018-10-01 00:05:59,000 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 202 states. [2018-10-01 00:05:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:59,572 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-10-01 00:05:59,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-01 00:05:59,572 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 201 [2018-10-01 00:05:59,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:59,573 INFO L225 Difference]: With dead ends: 205 [2018-10-01 00:05:59,573 INFO L226 Difference]: Without dead ends: 204 [2018-10-01 00:05:59,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19800 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=15351, Invalid=25251, Unknown=0, NotChecked=0, Total=40602 [2018-10-01 00:05:59,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-01 00:05:59,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2018-10-01 00:05:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-10-01 00:05:59,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2018-10-01 00:05:59,578 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 201 [2018-10-01 00:05:59,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:59,578 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2018-10-01 00:05:59,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 202 states. [2018-10-01 00:05:59,578 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2018-10-01 00:05:59,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-01 00:05:59,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:59,579 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1] [2018-10-01 00:05:59,579 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:59,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:59,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1515348904, now seen corresponding path program 100 times [2018-10-01 00:05:59,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:59,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:59,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:59,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:59,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:04,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:04,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:04,069 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:04,130 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:04,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:04,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:09,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:09,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 202 [2018-10-01 00:06:09,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 204 states [2018-10-01 00:06:09,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2018-10-01 00:06:09,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15656, Invalid=25756, Unknown=0, NotChecked=0, Total=41412 [2018-10-01 00:06:09,708 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand 204 states. [2018-10-01 00:06:10,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:10,285 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-10-01 00:06:10,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-01 00:06:10,285 INFO L78 Accepts]: Start accepts. Automaton has 204 states. Word has length 203 [2018-10-01 00:06:10,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:10,286 INFO L225 Difference]: With dead ends: 207 [2018-10-01 00:06:10,287 INFO L226 Difference]: Without dead ends: 206 [2018-10-01 00:06:10,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20200 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=15656, Invalid=25756, Unknown=0, NotChecked=0, Total=41412 [2018-10-01 00:06:10,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-01 00:06:10,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2018-10-01 00:06:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-10-01 00:06:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2018-10-01 00:06:10,294 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 203 [2018-10-01 00:06:10,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:10,294 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2018-10-01 00:06:10,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 204 states. [2018-10-01 00:06:10,294 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2018-10-01 00:06:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-10-01 00:06:10,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:10,295 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1] [2018-10-01 00:06:10,295 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:10,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:10,296 INFO L82 PathProgramCache]: Analyzing trace with hash 256384490, now seen corresponding path program 101 times [2018-10-01 00:06:10,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:10,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:10,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:10,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:10,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:14,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:14,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:14,921 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:15,186 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-10-01 00:06:15,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:15,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:20,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:20,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 204 [2018-10-01 00:06:20,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 206 states [2018-10-01 00:06:20,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2018-10-01 00:06:20,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15964, Invalid=26266, Unknown=0, NotChecked=0, Total=42230 [2018-10-01 00:06:20,947 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 206 states. [2018-10-01 00:06:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:21,547 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-10-01 00:06:21,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-01 00:06:21,547 INFO L78 Accepts]: Start accepts. Automaton has 206 states. Word has length 205 [2018-10-01 00:06:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:21,549 INFO L225 Difference]: With dead ends: 209 [2018-10-01 00:06:21,549 INFO L226 Difference]: Without dead ends: 208 [2018-10-01 00:06:21,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20604 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=15964, Invalid=26266, Unknown=0, NotChecked=0, Total=42230 [2018-10-01 00:06:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-10-01 00:06:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-10-01 00:06:21,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-01 00:06:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-01 00:06:21,555 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 205 [2018-10-01 00:06:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:21,555 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-01 00:06:21,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 206 states. [2018-10-01 00:06:21,555 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-01 00:06:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-01 00:06:21,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:21,556 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1] [2018-10-01 00:06:21,556 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:21,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:21,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1572360108, now seen corresponding path program 102 times [2018-10-01 00:06:21,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:21,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:21,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:21,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:21,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:26,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:26,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:26,233 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:26,370 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-10-01 00:06:26,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:26,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:32,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:32,375 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 206 [2018-10-01 00:06:32,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 208 states [2018-10-01 00:06:32,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2018-10-01 00:06:32,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16275, Invalid=26781, Unknown=0, NotChecked=0, Total=43056 [2018-10-01 00:06:32,379 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 208 states. [2018-10-01 00:06:32,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:32,931 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-10-01 00:06:32,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-01 00:06:32,932 INFO L78 Accepts]: Start accepts. Automaton has 208 states. Word has length 207 [2018-10-01 00:06:32,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:32,933 INFO L225 Difference]: With dead ends: 211 [2018-10-01 00:06:32,933 INFO L226 Difference]: Without dead ends: 210 [2018-10-01 00:06:32,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21012 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=16275, Invalid=26781, Unknown=0, NotChecked=0, Total=43056 [2018-10-01 00:06:32,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-01 00:06:32,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-10-01 00:06:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-10-01 00:06:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2018-10-01 00:06:32,941 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 207 [2018-10-01 00:06:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:32,941 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2018-10-01 00:06:32,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 208 states. [2018-10-01 00:06:32,942 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2018-10-01 00:06:32,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-01 00:06:32,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:32,943 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1] [2018-10-01 00:06:32,943 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:32,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:32,943 INFO L82 PathProgramCache]: Analyzing trace with hash -790423314, now seen corresponding path program 103 times [2018-10-01 00:06:32,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:32,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:32,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:32,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:32,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:37,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:37,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:37,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:37,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:43,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:43,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 208 [2018-10-01 00:06:43,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 210 states [2018-10-01 00:06:43,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2018-10-01 00:06:43,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16589, Invalid=27301, Unknown=0, NotChecked=0, Total=43890 [2018-10-01 00:06:43,499 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand 210 states. [2018-10-01 00:06:44,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:44,059 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-10-01 00:06:44,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-01 00:06:44,059 INFO L78 Accepts]: Start accepts. Automaton has 210 states. Word has length 209 [2018-10-01 00:06:44,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:44,060 INFO L225 Difference]: With dead ends: 213 [2018-10-01 00:06:44,060 INFO L226 Difference]: Without dead ends: 212 [2018-10-01 00:06:44,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21424 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=16589, Invalid=27301, Unknown=0, NotChecked=0, Total=43890 [2018-10-01 00:06:44,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-01 00:06:44,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-10-01 00:06:44,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-10-01 00:06:44,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2018-10-01 00:06:44,067 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 209 [2018-10-01 00:06:44,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:44,067 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2018-10-01 00:06:44,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 210 states. [2018-10-01 00:06:44,067 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2018-10-01 00:06:44,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-01 00:06:44,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:44,068 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1] [2018-10-01 00:06:44,069 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:44,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:44,069 INFO L82 PathProgramCache]: Analyzing trace with hash 612407728, now seen corresponding path program 104 times [2018-10-01 00:06:44,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:44,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:44,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:44,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:44,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:49,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:49,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:49,048 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:49,102 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:49,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:49,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:55,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:55,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 210 [2018-10-01 00:06:55,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 212 states [2018-10-01 00:06:55,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2018-10-01 00:06:55,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16906, Invalid=27826, Unknown=0, NotChecked=0, Total=44732 [2018-10-01 00:06:55,196 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 212 states. [2018-10-01 00:06:55,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:55,739 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-10-01 00:06:55,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-01 00:06:55,739 INFO L78 Accepts]: Start accepts. Automaton has 212 states. Word has length 211 [2018-10-01 00:06:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:55,740 INFO L225 Difference]: With dead ends: 215 [2018-10-01 00:06:55,740 INFO L226 Difference]: Without dead ends: 214 [2018-10-01 00:06:55,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21840 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=16906, Invalid=27826, Unknown=0, NotChecked=0, Total=44732 [2018-10-01 00:06:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-10-01 00:06:55,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-10-01 00:06:55,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-01 00:06:55,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2018-10-01 00:06:55,748 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 211 [2018-10-01 00:06:55,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:55,748 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2018-10-01 00:06:55,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 212 states. [2018-10-01 00:06:55,748 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2018-10-01 00:06:55,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-01 00:06:55,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:55,749 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1] [2018-10-01 00:06:55,749 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:55,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:55,750 INFO L82 PathProgramCache]: Analyzing trace with hash 113308146, now seen corresponding path program 105 times [2018-10-01 00:06:55,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:55,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:55,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:55,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:55,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:00,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:00,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:00,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:00,845 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-10-01 00:07:00,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:00,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:07,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:07,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 212 [2018-10-01 00:07:07,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 214 states [2018-10-01 00:07:07,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2018-10-01 00:07:07,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17226, Invalid=28356, Unknown=0, NotChecked=0, Total=45582 [2018-10-01 00:07:07,009 INFO L87 Difference]: Start difference. First operand 214 states and 214 transitions. Second operand 214 states. [2018-10-01 00:07:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:07,668 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-01 00:07:07,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-01 00:07:07,668 INFO L78 Accepts]: Start accepts. Automaton has 214 states. Word has length 213 [2018-10-01 00:07:07,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:07,669 INFO L225 Difference]: With dead ends: 217 [2018-10-01 00:07:07,669 INFO L226 Difference]: Without dead ends: 216 [2018-10-01 00:07:07,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22260 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=17226, Invalid=28356, Unknown=0, NotChecked=0, Total=45582 [2018-10-01 00:07:07,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-01 00:07:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-10-01 00:07:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-10-01 00:07:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 216 transitions. [2018-10-01 00:07:07,674 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 216 transitions. Word has length 213 [2018-10-01 00:07:07,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:07,674 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 216 transitions. [2018-10-01 00:07:07,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 214 states. [2018-10-01 00:07:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 216 transitions. [2018-10-01 00:07:07,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-10-01 00:07:07,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:07,675 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1] [2018-10-01 00:07:07,675 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:07,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:07,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1514946996, now seen corresponding path program 106 times [2018-10-01 00:07:07,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:07,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:07,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:07,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:07,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:12,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:12,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:12,668 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:12,731 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:12,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:12,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:19,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:19,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 214 [2018-10-01 00:07:19,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 216 states [2018-10-01 00:07:19,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2018-10-01 00:07:19,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17549, Invalid=28891, Unknown=0, NotChecked=0, Total=46440 [2018-10-01 00:07:19,129 INFO L87 Difference]: Start difference. First operand 216 states and 216 transitions. Second operand 216 states. [2018-10-01 00:07:19,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:19,808 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-10-01 00:07:19,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-01 00:07:19,808 INFO L78 Accepts]: Start accepts. Automaton has 216 states. Word has length 215 [2018-10-01 00:07:19,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:19,809 INFO L225 Difference]: With dead ends: 219 [2018-10-01 00:07:19,809 INFO L226 Difference]: Without dead ends: 218 [2018-10-01 00:07:19,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22684 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=17549, Invalid=28891, Unknown=0, NotChecked=0, Total=46440 [2018-10-01 00:07:19,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-01 00:07:19,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2018-10-01 00:07:19,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-10-01 00:07:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-10-01 00:07:19,816 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 215 [2018-10-01 00:07:19,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:19,817 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-10-01 00:07:19,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 216 states. [2018-10-01 00:07:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-10-01 00:07:19,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-01 00:07:19,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:19,818 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1] [2018-10-01 00:07:19,818 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:19,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:19,818 INFO L82 PathProgramCache]: Analyzing trace with hash -129849098, now seen corresponding path program 107 times [2018-10-01 00:07:19,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:19,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:19,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:19,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:19,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:24,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:24,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:24,926 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:25,088 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-10-01 00:07:25,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:25,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:31,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:31,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 216 [2018-10-01 00:07:31,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 218 states [2018-10-01 00:07:31,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2018-10-01 00:07:31,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17875, Invalid=29431, Unknown=0, NotChecked=0, Total=47306 [2018-10-01 00:07:31,283 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 218 states. [2018-10-01 00:07:31,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:31,979 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-10-01 00:07:31,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-01 00:07:31,979 INFO L78 Accepts]: Start accepts. Automaton has 218 states. Word has length 217 [2018-10-01 00:07:31,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:31,980 INFO L225 Difference]: With dead ends: 221 [2018-10-01 00:07:31,980 INFO L226 Difference]: Without dead ends: 220 [2018-10-01 00:07:31,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23112 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=17875, Invalid=29431, Unknown=0, NotChecked=0, Total=47306 [2018-10-01 00:07:31,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-10-01 00:07:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2018-10-01 00:07:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-01 00:07:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-01 00:07:31,987 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 217 [2018-10-01 00:07:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:31,987 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-01 00:07:31,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 218 states. [2018-10-01 00:07:31,987 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-01 00:07:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-01 00:07:31,988 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:31,988 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 1, 1] [2018-10-01 00:07:31,988 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:31,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:31,988 INFO L82 PathProgramCache]: Analyzing trace with hash -230930504, now seen corresponding path program 108 times [2018-10-01 00:07:31,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:31,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:31,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:31,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:31,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:37,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:37,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:37,210 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:37,365 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2018-10-01 00:07:37,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:37,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:43,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:43,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 218 [2018-10-01 00:07:43,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 220 states [2018-10-01 00:07:43,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 220 interpolants. [2018-10-01 00:07:43,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18204, Invalid=29976, Unknown=0, NotChecked=0, Total=48180 [2018-10-01 00:07:43,665 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 220 states. [2018-10-01 00:07:44,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:44,410 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-10-01 00:07:44,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-01 00:07:44,411 INFO L78 Accepts]: Start accepts. Automaton has 220 states. Word has length 219 [2018-10-01 00:07:44,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:44,411 INFO L225 Difference]: With dead ends: 223 [2018-10-01 00:07:44,412 INFO L226 Difference]: Without dead ends: 222 [2018-10-01 00:07:44,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23544 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=18204, Invalid=29976, Unknown=0, NotChecked=0, Total=48180 [2018-10-01 00:07:44,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-01 00:07:44,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2018-10-01 00:07:44,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-10-01 00:07:44,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2018-10-01 00:07:44,418 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 219 [2018-10-01 00:07:44,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:44,418 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2018-10-01 00:07:44,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 220 states. [2018-10-01 00:07:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2018-10-01 00:07:44,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-01 00:07:44,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:44,419 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 1, 1] [2018-10-01 00:07:44,420 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:44,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:44,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1414086138, now seen corresponding path program 109 times [2018-10-01 00:07:44,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:44,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:44,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:44,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:44,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:49,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:49,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:49,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:49,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:56,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:56,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 220 [2018-10-01 00:07:56,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 222 states [2018-10-01 00:07:56,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 222 interpolants. [2018-10-01 00:07:56,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18536, Invalid=30526, Unknown=0, NotChecked=0, Total=49062 [2018-10-01 00:07:56,476 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand 222 states. [2018-10-01 00:07:57,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:57,193 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-10-01 00:07:57,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-01 00:07:57,193 INFO L78 Accepts]: Start accepts. Automaton has 222 states. Word has length 221 [2018-10-01 00:07:57,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:57,194 INFO L225 Difference]: With dead ends: 225 [2018-10-01 00:07:57,194 INFO L226 Difference]: Without dead ends: 224 [2018-10-01 00:07:57,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23980 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=18536, Invalid=30526, Unknown=0, NotChecked=0, Total=49062 [2018-10-01 00:07:57,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-10-01 00:07:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2018-10-01 00:07:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-10-01 00:07:57,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 224 transitions. [2018-10-01 00:07:57,200 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 224 transitions. Word has length 221 [2018-10-01 00:07:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:57,200 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 224 transitions. [2018-10-01 00:07:57,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 222 states. [2018-10-01 00:07:57,200 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 224 transitions. [2018-10-01 00:07:57,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-01 00:07:57,201 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:57,201 INFO L375 BasicCegarLoop]: trace histogram [111, 110, 1, 1] [2018-10-01 00:07:57,201 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:57,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:57,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1727114172, now seen corresponding path program 110 times [2018-10-01 00:07:57,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:57,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:57,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:57,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:57,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:02,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:02,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:02,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:08:02,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:08:02,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:02,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:09,457 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:09,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 222 [2018-10-01 00:08:09,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 224 states [2018-10-01 00:08:09,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2018-10-01 00:08:09,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18871, Invalid=31081, Unknown=0, NotChecked=0, Total=49952 [2018-10-01 00:08:09,461 INFO L87 Difference]: Start difference. First operand 224 states and 224 transitions. Second operand 224 states. [2018-10-01 00:08:10,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:10,249 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-10-01 00:08:10,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-01 00:08:10,250 INFO L78 Accepts]: Start accepts. Automaton has 224 states. Word has length 223 [2018-10-01 00:08:10,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:10,250 INFO L225 Difference]: With dead ends: 227 [2018-10-01 00:08:10,251 INFO L226 Difference]: Without dead ends: 226 [2018-10-01 00:08:10,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24420 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=18871, Invalid=31081, Unknown=0, NotChecked=0, Total=49952 [2018-10-01 00:08:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-01 00:08:10,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-10-01 00:08:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-10-01 00:08:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 226 transitions. [2018-10-01 00:08:10,255 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 226 transitions. Word has length 223 [2018-10-01 00:08:10,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:10,256 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 226 transitions. [2018-10-01 00:08:10,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 224 states. [2018-10-01 00:08:10,256 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 226 transitions. [2018-10-01 00:08:10,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-01 00:08:10,256 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:10,256 INFO L375 BasicCegarLoop]: trace histogram [112, 111, 1, 1] [2018-10-01 00:08:10,257 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:10,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:10,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1899344126, now seen corresponding path program 111 times [2018-10-01 00:08:10,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:10,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:10,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:10,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:10,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:15,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:15,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:15,779 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:08:15,942 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 112 check-sat command(s) [2018-10-01 00:08:15,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:15,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:22,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:22,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 224 [2018-10-01 00:08:22,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 226 states [2018-10-01 00:08:22,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 226 interpolants. [2018-10-01 00:08:22,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19209, Invalid=31641, Unknown=0, NotChecked=0, Total=50850 [2018-10-01 00:08:22,625 INFO L87 Difference]: Start difference. First operand 226 states and 226 transitions. Second operand 226 states. [2018-10-01 00:08:23,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:23,355 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-10-01 00:08:23,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-10-01 00:08:23,355 INFO L78 Accepts]: Start accepts. Automaton has 226 states. Word has length 225 [2018-10-01 00:08:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:23,356 INFO L225 Difference]: With dead ends: 229 [2018-10-01 00:08:23,356 INFO L226 Difference]: Without dead ends: 228 [2018-10-01 00:08:23,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24864 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=19209, Invalid=31641, Unknown=0, NotChecked=0, Total=50850 [2018-10-01 00:08:23,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-01 00:08:23,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-10-01 00:08:23,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-10-01 00:08:23,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2018-10-01 00:08:23,362 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 225 [2018-10-01 00:08:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:23,362 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2018-10-01 00:08:23,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 226 states. [2018-10-01 00:08:23,363 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2018-10-01 00:08:23,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-01 00:08:23,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:23,363 INFO L375 BasicCegarLoop]: trace histogram [113, 112, 1, 1] [2018-10-01 00:08:23,363 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:23,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:23,364 INFO L82 PathProgramCache]: Analyzing trace with hash -91394624, now seen corresponding path program 112 times [2018-10-01 00:08:23,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:23,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:23,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:23,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:23,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:28,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:28,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:28,994 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:08:29,064 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:08:29,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:29,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:36,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:36,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 226 [2018-10-01 00:08:36,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 228 states [2018-10-01 00:08:36,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2018-10-01 00:08:36,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19550, Invalid=32206, Unknown=0, NotChecked=0, Total=51756 [2018-10-01 00:08:36,157 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 228 states. [2018-10-01 00:08:36,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:36,799 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2018-10-01 00:08:36,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-10-01 00:08:36,799 INFO L78 Accepts]: Start accepts. Automaton has 228 states. Word has length 227 [2018-10-01 00:08:36,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:36,800 INFO L225 Difference]: With dead ends: 231 [2018-10-01 00:08:36,800 INFO L226 Difference]: Without dead ends: 230 [2018-10-01 00:08:36,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25312 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=19550, Invalid=32206, Unknown=0, NotChecked=0, Total=51756 [2018-10-01 00:08:36,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-01 00:08:36,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2018-10-01 00:08:36,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-10-01 00:08:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2018-10-01 00:08:36,807 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 227 [2018-10-01 00:08:36,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:36,807 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2018-10-01 00:08:36,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 228 states. [2018-10-01 00:08:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2018-10-01 00:08:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-10-01 00:08:36,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:36,808 INFO L375 BasicCegarLoop]: trace histogram [114, 113, 1, 1] [2018-10-01 00:08:36,808 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:36,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:36,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1930886654, now seen corresponding path program 113 times [2018-10-01 00:08:36,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:36,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:36,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:36,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:36,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:42,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:42,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:42,472 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:08:42,705 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 114 check-sat command(s) [2018-10-01 00:08:42,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:42,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:49,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:49,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 228 [2018-10-01 00:08:49,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 230 states [2018-10-01 00:08:49,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 230 interpolants. [2018-10-01 00:08:49,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19894, Invalid=32776, Unknown=0, NotChecked=0, Total=52670 [2018-10-01 00:08:49,723 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand 230 states. [2018-10-01 00:08:50,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:50,348 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-10-01 00:08:50,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-10-01 00:08:50,349 INFO L78 Accepts]: Start accepts. Automaton has 230 states. Word has length 229 [2018-10-01 00:08:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:50,349 INFO L225 Difference]: With dead ends: 233 [2018-10-01 00:08:50,349 INFO L226 Difference]: Without dead ends: 232 [2018-10-01 00:08:50,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25764 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=19894, Invalid=32776, Unknown=0, NotChecked=0, Total=52670 [2018-10-01 00:08:50,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-10-01 00:08:50,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2018-10-01 00:08:50,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-01 00:08:50,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-01 00:08:50,354 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 229 [2018-10-01 00:08:50,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:50,355 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-01 00:08:50,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 230 states. [2018-10-01 00:08:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-01 00:08:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-01 00:08:50,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:50,355 INFO L375 BasicCegarLoop]: trace histogram [115, 114, 1, 1] [2018-10-01 00:08:50,356 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:50,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:50,356 INFO L82 PathProgramCache]: Analyzing trace with hash -156201532, now seen corresponding path program 114 times [2018-10-01 00:08:50,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:50,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:50,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:50,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:50,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:56,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:56,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:56,155 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:08:56,310 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 115 check-sat command(s) [2018-10-01 00:08:56,310 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:56,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:03,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:03,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 230 [2018-10-01 00:09:03,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 232 states [2018-10-01 00:09:03,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 232 interpolants. [2018-10-01 00:09:03,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20241, Invalid=33351, Unknown=0, NotChecked=0, Total=53592 [2018-10-01 00:09:03,619 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 232 states. [2018-10-01 00:09:04,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:04,270 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-10-01 00:09:04,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-10-01 00:09:04,270 INFO L78 Accepts]: Start accepts. Automaton has 232 states. Word has length 231 [2018-10-01 00:09:04,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:04,271 INFO L225 Difference]: With dead ends: 235 [2018-10-01 00:09:04,271 INFO L226 Difference]: Without dead ends: 234 [2018-10-01 00:09:04,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26220 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=20241, Invalid=33351, Unknown=0, NotChecked=0, Total=53592 [2018-10-01 00:09:04,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-01 00:09:04,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2018-10-01 00:09:04,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-10-01 00:09:04,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 234 transitions. [2018-10-01 00:09:04,277 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 234 transitions. Word has length 231 [2018-10-01 00:09:04,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:04,277 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 234 transitions. [2018-10-01 00:09:04,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 232 states. [2018-10-01 00:09:04,277 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 234 transitions. [2018-10-01 00:09:04,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-01 00:09:04,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:04,278 INFO L375 BasicCegarLoop]: trace histogram [116, 115, 1, 1] [2018-10-01 00:09:04,278 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:04,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:04,278 INFO L82 PathProgramCache]: Analyzing trace with hash 214184198, now seen corresponding path program 115 times [2018-10-01 00:09:04,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:04,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:04,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:04,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:04,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:10,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:10,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:10,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:10,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:17,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:17,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 232 [2018-10-01 00:09:17,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 234 states [2018-10-01 00:09:17,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 234 interpolants. [2018-10-01 00:09:17,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20591, Invalid=33931, Unknown=0, NotChecked=0, Total=54522 [2018-10-01 00:09:17,598 INFO L87 Difference]: Start difference. First operand 234 states and 234 transitions. Second operand 234 states. [2018-10-01 00:09:18,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:18,327 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-10-01 00:09:18,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-10-01 00:09:18,328 INFO L78 Accepts]: Start accepts. Automaton has 234 states. Word has length 233 [2018-10-01 00:09:18,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:18,328 INFO L225 Difference]: With dead ends: 237 [2018-10-01 00:09:18,328 INFO L226 Difference]: Without dead ends: 236 [2018-10-01 00:09:18,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26680 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=20591, Invalid=33931, Unknown=0, NotChecked=0, Total=54522 [2018-10-01 00:09:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-10-01 00:09:18,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2018-10-01 00:09:18,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-10-01 00:09:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2018-10-01 00:09:18,334 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 233 [2018-10-01 00:09:18,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:18,334 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2018-10-01 00:09:18,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 234 states. [2018-10-01 00:09:18,334 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2018-10-01 00:09:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-01 00:09:18,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:18,335 INFO L375 BasicCegarLoop]: trace histogram [117, 116, 1, 1] [2018-10-01 00:09:18,335 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:18,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:18,335 INFO L82 PathProgramCache]: Analyzing trace with hash -327414840, now seen corresponding path program 116 times [2018-10-01 00:09:18,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:18,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:18,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:18,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:18,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:24,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:24,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:24,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:09:24,374 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:09:24,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:24,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:32,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:32,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 234 [2018-10-01 00:09:32,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 236 states [2018-10-01 00:09:32,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2018-10-01 00:09:32,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20944, Invalid=34516, Unknown=0, NotChecked=0, Total=55460 [2018-10-01 00:09:32,046 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 236 states. [2018-10-01 00:09:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:32,752 INFO L93 Difference]: Finished difference Result 239 states and 239 transitions. [2018-10-01 00:09:32,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-10-01 00:09:32,752 INFO L78 Accepts]: Start accepts. Automaton has 236 states. Word has length 235 [2018-10-01 00:09:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:32,753 INFO L225 Difference]: With dead ends: 239 [2018-10-01 00:09:32,753 INFO L226 Difference]: Without dead ends: 238 [2018-10-01 00:09:32,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27144 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=20944, Invalid=34516, Unknown=0, NotChecked=0, Total=55460 [2018-10-01 00:09:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-10-01 00:09:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2018-10-01 00:09:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-10-01 00:09:32,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2018-10-01 00:09:32,758 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 235 [2018-10-01 00:09:32,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:32,759 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2018-10-01 00:09:32,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 236 states. [2018-10-01 00:09:32,759 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2018-10-01 00:09:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-01 00:09:32,760 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:32,760 INFO L375 BasicCegarLoop]: trace histogram [118, 117, 1, 1] [2018-10-01 00:09:32,760 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:32,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:32,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1113047542, now seen corresponding path program 117 times [2018-10-01 00:09:32,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:32,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:32,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:32,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:32,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:38,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:38,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:38,774 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:09:38,945 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 118 check-sat command(s) [2018-10-01 00:09:38,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:38,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:46,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:46,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 236 [2018-10-01 00:09:46,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 238 states [2018-10-01 00:09:46,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 238 interpolants. [2018-10-01 00:09:46,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21300, Invalid=35106, Unknown=0, NotChecked=0, Total=56406 [2018-10-01 00:09:46,345 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand 238 states. [2018-10-01 00:09:47,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:47,298 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-10-01 00:09:47,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-01 00:09:47,299 INFO L78 Accepts]: Start accepts. Automaton has 238 states. Word has length 237 [2018-10-01 00:09:47,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:47,300 INFO L225 Difference]: With dead ends: 241 [2018-10-01 00:09:47,300 INFO L226 Difference]: Without dead ends: 240 [2018-10-01 00:09:47,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27612 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=21300, Invalid=35106, Unknown=0, NotChecked=0, Total=56406 [2018-10-01 00:09:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-10-01 00:09:47,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2018-10-01 00:09:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-10-01 00:09:47,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 240 transitions. [2018-10-01 00:09:47,306 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 240 transitions. Word has length 237 [2018-10-01 00:09:47,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:47,306 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 240 transitions. [2018-10-01 00:09:47,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 238 states. [2018-10-01 00:09:47,306 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 240 transitions. [2018-10-01 00:09:47,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-10-01 00:09:47,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:47,307 INFO L375 BasicCegarLoop]: trace histogram [119, 118, 1, 1] [2018-10-01 00:09:47,307 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:47,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:47,307 INFO L82 PathProgramCache]: Analyzing trace with hash -191830068, now seen corresponding path program 118 times [2018-10-01 00:09:47,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:47,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:47,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:47,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:47,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:53,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:53,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:53,229 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:09:53,298 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:09:53,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:53,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:00,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:00,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 238 [2018-10-01 00:10:00,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 240 states [2018-10-01 00:10:00,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 240 interpolants. [2018-10-01 00:10:00,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21659, Invalid=35701, Unknown=0, NotChecked=0, Total=57360 [2018-10-01 00:10:00,902 INFO L87 Difference]: Start difference. First operand 240 states and 240 transitions. Second operand 240 states. [2018-10-01 00:10:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:01,531 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-10-01 00:10:01,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-01 00:10:01,531 INFO L78 Accepts]: Start accepts. Automaton has 240 states. Word has length 239 [2018-10-01 00:10:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:01,532 INFO L225 Difference]: With dead ends: 243 [2018-10-01 00:10:01,532 INFO L226 Difference]: Without dead ends: 242 [2018-10-01 00:10:01,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28084 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=21659, Invalid=35701, Unknown=0, NotChecked=0, Total=57360 [2018-10-01 00:10:01,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-01 00:10:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2018-10-01 00:10:01,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-10-01 00:10:01,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2018-10-01 00:10:01,539 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 239 [2018-10-01 00:10:01,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:01,539 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2018-10-01 00:10:01,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 240 states. [2018-10-01 00:10:01,539 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2018-10-01 00:10:01,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-01 00:10:01,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:01,540 INFO L375 BasicCegarLoop]: trace histogram [120, 119, 1, 1] [2018-10-01 00:10:01,540 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:01,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:01,540 INFO L82 PathProgramCache]: Analyzing trace with hash 334899470, now seen corresponding path program 119 times [2018-10-01 00:10:01,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:01,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:01,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:01,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:01,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:08,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:08,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:08,054 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:10:08,274 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 120 check-sat command(s) [2018-10-01 00:10:08,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:08,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:16,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:16,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 240 [2018-10-01 00:10:16,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 242 states [2018-10-01 00:10:16,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 242 interpolants. [2018-10-01 00:10:16,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22021, Invalid=36301, Unknown=0, NotChecked=0, Total=58322 [2018-10-01 00:10:16,041 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 242 states. [2018-10-01 00:10:16,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:16,770 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-10-01 00:10:16,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-01 00:10:16,771 INFO L78 Accepts]: Start accepts. Automaton has 242 states. Word has length 241 [2018-10-01 00:10:16,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:16,772 INFO L225 Difference]: With dead ends: 245 [2018-10-01 00:10:16,772 INFO L226 Difference]: Without dead ends: 244 [2018-10-01 00:10:16,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28560 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=22021, Invalid=36301, Unknown=0, NotChecked=0, Total=58322 [2018-10-01 00:10:16,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-10-01 00:10:16,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2018-10-01 00:10:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-01 00:10:16,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-01 00:10:16,778 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 241 [2018-10-01 00:10:16,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:16,778 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-01 00:10:16,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 242 states. [2018-10-01 00:10:16,778 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-01 00:10:16,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-01 00:10:16,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:16,779 INFO L375 BasicCegarLoop]: trace histogram [121, 120, 1, 1] [2018-10-01 00:10:16,779 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:16,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:16,780 INFO L82 PathProgramCache]: Analyzing trace with hash -284155440, now seen corresponding path program 120 times [2018-10-01 00:10:16,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:16,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:16,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:16,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:16,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:23,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:23,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:23,252 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:10:23,421 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 121 check-sat command(s) [2018-10-01 00:10:23,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:23,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:31,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:31,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 242 [2018-10-01 00:10:31,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 244 states [2018-10-01 00:10:31,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 244 interpolants. [2018-10-01 00:10:31,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22386, Invalid=36906, Unknown=0, NotChecked=0, Total=59292 [2018-10-01 00:10:31,213 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 244 states. [2018-10-01 00:10:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:32,047 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-10-01 00:10:32,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-10-01 00:10:32,048 INFO L78 Accepts]: Start accepts. Automaton has 244 states. Word has length 243 [2018-10-01 00:10:32,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:32,048 INFO L225 Difference]: With dead ends: 247 [2018-10-01 00:10:32,048 INFO L226 Difference]: Without dead ends: 246 [2018-10-01 00:10:32,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29040 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=22386, Invalid=36906, Unknown=0, NotChecked=0, Total=59292 [2018-10-01 00:10:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-01 00:10:32,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-10-01 00:10:32,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-10-01 00:10:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 246 transitions. [2018-10-01 00:10:32,054 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 246 transitions. Word has length 243 [2018-10-01 00:10:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:32,054 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 246 transitions. [2018-10-01 00:10:32,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 244 states. [2018-10-01 00:10:32,054 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 246 transitions. [2018-10-01 00:10:32,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-10-01 00:10:32,055 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:32,055 INFO L375 BasicCegarLoop]: trace histogram [122, 121, 1, 1] [2018-10-01 00:10:32,055 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:32,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:32,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1804530194, now seen corresponding path program 121 times [2018-10-01 00:10:32,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:32,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:32,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:32,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:32,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:38,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:38,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:38,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:38,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:46,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:46,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 244 [2018-10-01 00:10:46,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 246 states [2018-10-01 00:10:46,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 246 interpolants. [2018-10-01 00:10:46,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22754, Invalid=37516, Unknown=0, NotChecked=0, Total=60270 [2018-10-01 00:10:46,639 INFO L87 Difference]: Start difference. First operand 246 states and 246 transitions. Second operand 246 states. [2018-10-01 00:10:47,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:47,319 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-10-01 00:10:47,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-10-01 00:10:47,319 INFO L78 Accepts]: Start accepts. Automaton has 246 states. Word has length 245 [2018-10-01 00:10:47,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:47,320 INFO L225 Difference]: With dead ends: 249 [2018-10-01 00:10:47,320 INFO L226 Difference]: Without dead ends: 248 [2018-10-01 00:10:47,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29524 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=22754, Invalid=37516, Unknown=0, NotChecked=0, Total=60270 [2018-10-01 00:10:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-10-01 00:10:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2018-10-01 00:10:47,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-10-01 00:10:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2018-10-01 00:10:47,326 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 245 [2018-10-01 00:10:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:47,326 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2018-10-01 00:10:47,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 246 states. [2018-10-01 00:10:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2018-10-01 00:10:47,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-01 00:10:47,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:47,327 INFO L375 BasicCegarLoop]: trace histogram [123, 122, 1, 1] [2018-10-01 00:10:47,327 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:47,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:47,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1013270060, now seen corresponding path program 122 times [2018-10-01 00:10:47,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:47,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:47,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:47,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:47,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:54,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:54,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:54,117 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:10:54,178 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:10:54,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:54,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:02,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:02,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 246 [2018-10-01 00:11:02,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 248 states [2018-10-01 00:11:02,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 248 interpolants. [2018-10-01 00:11:02,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23125, Invalid=38131, Unknown=0, NotChecked=0, Total=61256 [2018-10-01 00:11:02,178 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 248 states. [2018-10-01 00:11:02,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:02,963 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2018-10-01 00:11:02,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-10-01 00:11:02,963 INFO L78 Accepts]: Start accepts. Automaton has 248 states. Word has length 247 [2018-10-01 00:11:02,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:02,964 INFO L225 Difference]: With dead ends: 251 [2018-10-01 00:11:02,964 INFO L226 Difference]: Without dead ends: 250 [2018-10-01 00:11:02,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30012 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=23125, Invalid=38131, Unknown=0, NotChecked=0, Total=61256 [2018-10-01 00:11:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-10-01 00:11:02,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2018-10-01 00:11:02,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-10-01 00:11:02,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 250 transitions. [2018-10-01 00:11:02,970 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 250 transitions. Word has length 247 [2018-10-01 00:11:02,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:02,970 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 250 transitions. [2018-10-01 00:11:02,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 248 states. [2018-10-01 00:11:02,970 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 250 transitions. [2018-10-01 00:11:02,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-10-01 00:11:02,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:02,971 INFO L375 BasicCegarLoop]: trace histogram [124, 123, 1, 1] [2018-10-01 00:11:02,971 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:02,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:02,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1205049622, now seen corresponding path program 123 times [2018-10-01 00:11:02,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:02,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:02,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:02,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:02,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:09,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:09,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:09,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:11:10,026 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 124 check-sat command(s) [2018-10-01 00:11:10,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:10,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:18,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:18,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 248 [2018-10-01 00:11:18,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 250 states [2018-10-01 00:11:18,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 250 interpolants. [2018-10-01 00:11:18,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23499, Invalid=38751, Unknown=0, NotChecked=0, Total=62250 [2018-10-01 00:11:18,106 INFO L87 Difference]: Start difference. First operand 250 states and 250 transitions. Second operand 250 states. [2018-10-01 00:11:19,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:19,067 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-10-01 00:11:19,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-10-01 00:11:19,067 INFO L78 Accepts]: Start accepts. Automaton has 250 states. Word has length 249 [2018-10-01 00:11:19,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:19,068 INFO L225 Difference]: With dead ends: 253 [2018-10-01 00:11:19,068 INFO L226 Difference]: Without dead ends: 252 [2018-10-01 00:11:19,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30504 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=23499, Invalid=38751, Unknown=0, NotChecked=0, Total=62250 [2018-10-01 00:11:19,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-10-01 00:11:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2018-10-01 00:11:19,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-10-01 00:11:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 252 transitions. [2018-10-01 00:11:19,075 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 252 transitions. Word has length 249 [2018-10-01 00:11:19,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:19,075 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 252 transitions. [2018-10-01 00:11:19,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 250 states. [2018-10-01 00:11:19,075 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 252 transitions. [2018-10-01 00:11:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-10-01 00:11:19,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:19,076 INFO L375 BasicCegarLoop]: trace histogram [125, 124, 1, 1] [2018-10-01 00:11:19,076 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:19,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:19,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1588482088, now seen corresponding path program 124 times [2018-10-01 00:11:19,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:19,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:19,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:19,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:19,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:25,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:25,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:25,523 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:11:25,595 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:11:25,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:25,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:33,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:33,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 250 [2018-10-01 00:11:33,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 252 states [2018-10-01 00:11:33,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 252 interpolants. [2018-10-01 00:11:33,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23876, Invalid=39376, Unknown=0, NotChecked=0, Total=63252 [2018-10-01 00:11:33,482 INFO L87 Difference]: Start difference. First operand 252 states and 252 transitions. Second operand 252 states. [2018-10-01 00:11:34,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:34,230 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2018-10-01 00:11:34,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-10-01 00:11:34,231 INFO L78 Accepts]: Start accepts. Automaton has 252 states. Word has length 251 [2018-10-01 00:11:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:34,231 INFO L225 Difference]: With dead ends: 255 [2018-10-01 00:11:34,231 INFO L226 Difference]: Without dead ends: 254 [2018-10-01 00:11:34,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31000 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=23876, Invalid=39376, Unknown=0, NotChecked=0, Total=63252 [2018-10-01 00:11:34,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-01 00:11:34,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2018-10-01 00:11:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-10-01 00:11:34,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 254 transitions. [2018-10-01 00:11:34,238 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 254 transitions. Word has length 251 [2018-10-01 00:11:34,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:34,238 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 254 transitions. [2018-10-01 00:11:34,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 252 states. [2018-10-01 00:11:34,238 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 254 transitions. [2018-10-01 00:11:34,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-01 00:11:34,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:34,239 INFO L375 BasicCegarLoop]: trace histogram [126, 125, 1, 1] [2018-10-01 00:11:34,239 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:34,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:34,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1817895398, now seen corresponding path program 125 times [2018-10-01 00:11:34,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:34,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:34,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:34,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:34,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:40,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:40,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:40,824 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:11:41,034 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 126 check-sat command(s) [2018-10-01 00:11:41,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:41,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:48,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:48,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 252 [2018-10-01 00:11:48,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 254 states [2018-10-01 00:11:48,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 254 interpolants. [2018-10-01 00:11:48,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24256, Invalid=40006, Unknown=0, NotChecked=0, Total=64262 [2018-10-01 00:11:48,978 INFO L87 Difference]: Start difference. First operand 254 states and 254 transitions. Second operand 254 states. [2018-10-01 00:11:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:49,883 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-10-01 00:11:49,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-01 00:11:49,883 INFO L78 Accepts]: Start accepts. Automaton has 254 states. Word has length 253 [2018-10-01 00:11:49,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:49,883 INFO L225 Difference]: With dead ends: 257 [2018-10-01 00:11:49,883 INFO L226 Difference]: Without dead ends: 256 [2018-10-01 00:11:49,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31500 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=24256, Invalid=40006, Unknown=0, NotChecked=0, Total=64262 [2018-10-01 00:11:49,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-10-01 00:11:49,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-10-01 00:11:49,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-01 00:11:49,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-01 00:11:49,889 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 253 [2018-10-01 00:11:49,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:49,889 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-01 00:11:49,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 254 states. [2018-10-01 00:11:49,890 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-01 00:11:49,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-01 00:11:49,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:49,890 INFO L375 BasicCegarLoop]: trace histogram [127, 126, 1, 1] [2018-10-01 00:11:49,890 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:49,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:49,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1054213084, now seen corresponding path program 126 times [2018-10-01 00:11:49,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:49,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:49,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:49,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:49,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16002 backedges. 0 proven. 16002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:56,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:56,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:56,548 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:11:56,742 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 127 check-sat command(s) [2018-10-01 00:11:56,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:56,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-01 00:12:04,604 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-01 00:12:04,805 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:12:04,805 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 00:12:04,810 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 00:12:04,811 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 12:12:04 BoogieIcfgContainer [2018-10-01 00:12:04,811 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 00:12:04,811 INFO L168 Benchmark]: Toolchain (without parser) took 769057.99 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 110.1 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 169.6 MB). Peak memory consumption was 932.0 MB. Max. memory is 7.1 GB. [2018-10-01 00:12:04,813 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. [2018-10-01 00:12:04,813 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:12:04,813 INFO L168 Benchmark]: Boogie Preprocessor took 21.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:12:04,814 INFO L168 Benchmark]: RCFGBuilder took 254.03 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-01 00:12:04,814 INFO L168 Benchmark]: TraceAbstraction took 768731.20 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 110.1 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 148.4 MB). Peak memory consumption was 910.9 MB. Max. memory is 7.1 GB. [2018-10-01 00:12:04,816 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 44.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.26 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 254.03 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 768731.20 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 110.1 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 148.4 MB). Peak memory consumption was 910.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 256 with TraceHistMax 127, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 254 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 768.6s OverallTime, 127 OverallIterations, 127 TraceHistogramMax, 47.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 254 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 31269 SolverSat, 430 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 30.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24001 GetRequests, 8000 SyntacticMatches, 0 SemanticMatches, 16001 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333500 ImplicationChecksByTransitivity, 675.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=256occurred in iteration=126, 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: 0.5s AutomataMinimizationTime, 126 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 9.7s SatisfiabilityAnalysisTime, 687.5s InterpolantComputationTime, 32253 NumberOfCodeBlocks, 32253 NumberOfCodeBlocksAsserted, 4241 NumberOfCheckSat, 32002 ConstructedInterpolants, 0 QuantifiedInterpolants, 32388020 SizeOfPredicates, 0 NumberOfNonLiveVariables, 32500 ConjunctsInSsa, 8250 ConjunctsInUnsatCore, 251 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1333500 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_00-12-04-824.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_00-12-04-824.csv Completed graceful shutdown