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/HiddenEqualityWithBranches.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:25:20,504 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:25:20,507 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:25:20,521 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:25:20,521 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:25:20,524 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:25:20,526 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:25:20,529 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:25:20,531 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:25:20,532 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:25:20,539 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 09:25:20,539 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 09:25:20,540 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 09:25:20,541 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 09:25:20,542 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 09:25:20,543 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 09:25:20,544 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 09:25:20,546 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 09:25:20,548 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 09:25:20,549 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 09:25:20,551 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 09:25:20,552 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 09:25:20,554 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 09:25:20,571 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 [2018-10-04 09:25:20,599 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:25:20,601 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:25:20,602 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:25:20,602 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:25:20,602 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:25:20,602 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:25:20,605 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:25:20,605 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:25:20,605 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:25:20,606 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:25:20,606 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:25:20,606 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:25:20,606 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:25:20,607 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:25:20,607 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:25:20,607 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:25:20,607 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:25:20,607 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:25:20,608 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:25:20,608 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:25:20,608 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:25:20,608 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:25:20,608 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:25:20,609 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:25:20,609 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:25:20,609 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:25:20,609 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:25:20,609 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:25:20,610 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:25:20,610 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:25:20,653 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:25:20,667 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:25:20,672 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:25:20,674 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:25:20,674 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:25:20,675 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl [2018-10-04 09:25:20,675 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl' [2018-10-04 09:25:20,729 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:25:20,732 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:25:20,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:25:20,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:25:20,733 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:25:20,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:20" (1/1) ... [2018-10-04 09:25:20,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:20" (1/1) ... [2018-10-04 09:25:20,773 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 09:25:20,773 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 09:25:20,774 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 09:25:20,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:25:20,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:25:20,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:25:20,777 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:25:20,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:20" (1/1) ... [2018-10-04 09:25:20,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:20" (1/1) ... [2018-10-04 09:25:20,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:20" (1/1) ... [2018-10-04 09:25:20,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:20" (1/1) ... [2018-10-04 09:25:20,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:20" (1/1) ... [2018-10-04 09:25:20,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:20" (1/1) ... [2018-10-04 09:25:20,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:20" (1/1) ... [2018-10-04 09:25:20,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:25:20,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:25:20,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:25:20,804 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:25:20,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:25:20,879 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-04 09:25:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 09:25:20,879 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 09:25:21,101 INFO L338 CfgBuilder]: Using library mode [2018-10-04 09:25:21,101 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:25:21 BoogieIcfgContainer [2018-10-04 09:25:21,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:25:21,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:25:21,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:25:21,112 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:25:21,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:25:20" (1/2) ... [2018-10-04 09:25:21,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2694b593 and model type HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:25:21, skipping insertion in model container [2018-10-04 09:25:21,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:25:21" (2/2) ... [2018-10-04 09:25:21,116 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEqualityWithBranches.bpl [2018-10-04 09:25:21,129 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:25:21,140 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:25:21,197 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:25:21,198 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:25:21,199 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:25:21,199 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:25:21,199 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:25:21,199 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:25:21,199 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:25:21,200 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:25:21,200 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:25:21,216 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 09:25:21,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-04 09:25:21,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:21,225 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-04 09:25:21,226 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:21,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:21,233 INFO L82 PathProgramCache]: Analyzing trace with hash 979, now seen corresponding path program 1 times [2018-10-04 09:25:21,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:21,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:21,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:21,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:21,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:21,372 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:25:21,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 09:25:21,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:25:21,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:25:21,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:25:21,391 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 09:25:21,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:21,485 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-04 09:25:21,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:25:21,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-04 09:25:21,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:21,505 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:25:21,505 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 09:25:21,509 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 [2018-10-04 09:25:21,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 09:25:21,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 09:25:21,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 09:25:21,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-10-04 09:25:21,551 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 9 transitions. Word has length 2 [2018-10-04 09:25:21,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:21,552 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 9 transitions. [2018-10-04 09:25:21,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:25:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 9 transitions. [2018-10-04 09:25:21,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 09:25:21,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:21,553 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-04 09:25:21,553 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:21,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:21,554 INFO L82 PathProgramCache]: Analyzing trace with hash 28757385, now seen corresponding path program 1 times [2018-10-04 09:25:21,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:21,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:21,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:21,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:21,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:21,626 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:25:21,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 09:25:21,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:25:21,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:25:21,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:25:21,631 INFO L87 Difference]: Start difference. First operand 7 states and 9 transitions. Second operand 3 states. [2018-10-04 09:25:21,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:21,651 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2018-10-04 09:25:21,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:25:21,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-10-04 09:25:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:21,655 INFO L225 Difference]: With dead ends: 12 [2018-10-04 09:25:21,655 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 09:25:21,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:25:21,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 09:25:21,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 09:25:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 09:25:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-04 09:25:21,664 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-10-04 09:25:21,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:21,664 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-04 09:25:21,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:25:21,665 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-04 09:25:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 09:25:21,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:21,671 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-04 09:25:21,671 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:21,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:21,672 INFO L82 PathProgramCache]: Analyzing trace with hash 28757447, now seen corresponding path program 1 times [2018-10-04 09:25:21,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:21,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:21,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:21,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:21,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:21,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:21,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:21,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:21,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:21,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:21,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-04 09:25:21,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:25:21,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:25:21,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:25:21,803 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-10-04 09:25:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:21,873 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2018-10-04 09:25:21,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:25:21,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-10-04 09:25:21,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:21,874 INFO L225 Difference]: With dead ends: 14 [2018-10-04 09:25:21,875 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 09:25:21,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:25:21,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 09:25:21,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 09:25:21,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 09:25:21,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-10-04 09:25:21,878 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 5 [2018-10-04 09:25:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:21,879 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-10-04 09:25:21,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:25:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-10-04 09:25:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:25:21,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:21,880 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2018-10-04 09:25:21,880 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:21,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:21,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203669, now seen corresponding path program 1 times [2018-10-04 09:25:21,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:21,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:21,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:21,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:21,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:21,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:21,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:21,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:22,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:22,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:22,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 09:25:22,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:25:22,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:25:22,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:25:22,038 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-10-04 09:25:22,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:22,058 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2018-10-04 09:25:22,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:25:22,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-04 09:25:22,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:22,059 INFO L225 Difference]: With dead ends: 15 [2018-10-04 09:25:22,059 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:25:22,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:25:22,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:25:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 09:25:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 09:25:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-10-04 09:25:22,064 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2018-10-04 09:25:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:22,064 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-10-04 09:25:22,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:25:22,065 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-10-04 09:25:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:25:22,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:22,065 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1] [2018-10-04 09:25:22,066 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:22,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:22,066 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203731, now seen corresponding path program 2 times [2018-10-04 09:25:22,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:22,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:22,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:22,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:22,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:22,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:22,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:22,159 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:25:22,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:25:22,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:22,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:22,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:22,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 09:25:22,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:25:22,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:25:22,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:25:22,204 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states. [2018-10-04 09:25:22,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:22,265 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-04 09:25:22,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:25:22,266 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 09:25:22,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:22,266 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:25:22,267 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 09:25:22,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:25:22,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 09:25:22,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 09:25:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:25:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-10-04 09:25:22,271 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-10-04 09:25:22,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:22,271 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-10-04 09:25:22,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:25:22,271 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-10-04 09:25:22,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:25:22,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:22,272 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1] [2018-10-04 09:25:22,272 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:22,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:22,273 INFO L82 PathProgramCache]: Analyzing trace with hash 154849801, now seen corresponding path program 2 times [2018-10-04 09:25:22,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:22,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:22,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:22,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:22,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:22,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:22,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:22,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:25:22,419 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:25:22,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:22,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:22,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:22,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:25:22,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:25:22,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:25:22,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:25:22,465 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2018-10-04 09:25:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:22,551 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2018-10-04 09:25:22,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:25:22,552 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-04 09:25:22,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:22,553 INFO L225 Difference]: With dead ends: 18 [2018-10-04 09:25:22,553 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 09:25:22,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:25:22,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 09:25:22,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 09:25:22,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:25:22,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-04 09:25:22,557 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-10-04 09:25:22,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:22,558 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-04 09:25:22,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:25:22,558 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-04 09:25:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:25:22,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:22,559 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1] [2018-10-04 09:25:22,559 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:22,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:22,560 INFO L82 PathProgramCache]: Analyzing trace with hash 154849863, now seen corresponding path program 3 times [2018-10-04 09:25:22,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:22,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:22,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:22,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:22,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:22,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:22,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:22,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:25:22,765 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 09:25:22,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:22,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:22,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:22,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:25:22,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:25:22,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:25:22,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:25:22,803 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-10-04 09:25:22,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:22,838 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-10-04 09:25:22,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:25:22,839 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-10-04 09:25:22,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:22,839 INFO L225 Difference]: With dead ends: 20 [2018-10-04 09:25:22,840 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 09:25:22,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:25:22,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 09:25:22,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 09:25:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:25:22,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-04 09:25:22,845 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2018-10-04 09:25:22,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:22,845 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-04 09:25:22,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:25:22,846 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-04 09:25:22,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 09:25:22,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:22,846 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1] [2018-10-04 09:25:22,847 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:22,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:22,847 INFO L82 PathProgramCache]: Analyzing trace with hash 336984725, now seen corresponding path program 3 times [2018-10-04 09:25:22,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:22,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:22,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:22,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:22,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:22,932 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:22,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:22,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:22,941 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:25:22,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-04 09:25:22,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:22,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:23,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:23,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-04 09:25:23,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:25:23,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:25:23,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:25:23,141 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 11 states. [2018-10-04 09:25:23,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:23,655 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-10-04 09:25:23,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:25:23,656 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-10-04 09:25:23,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:23,657 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:25:23,657 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 09:25:23,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:25:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 09:25:23,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 09:25:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 09:25:23,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-10-04 09:25:23,662 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-10-04 09:25:23,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:23,663 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-10-04 09:25:23,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:25:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-10-04 09:25:23,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:25:23,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:23,664 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2018-10-04 09:25:23,664 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:23,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:23,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810761, now seen corresponding path program 4 times [2018-10-04 09:25:23,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:23,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:23,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:23,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:23,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:23,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:23,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:23,795 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:25:23,813 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:25:23,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:23,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:23,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:23,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:25:23,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:25:23,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:25:23,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:25:23,846 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2018-10-04 09:25:23,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:23,874 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-10-04 09:25:23,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:25:23,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-10-04 09:25:23,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:23,876 INFO L225 Difference]: With dead ends: 24 [2018-10-04 09:25:23,876 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 09:25:23,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:25:23,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 09:25:23,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 09:25:23,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:25:23,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-04 09:25:23,882 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-10-04 09:25:23,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:23,883 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-04 09:25:23,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:25:23,883 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-04 09:25:23,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:25:23,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:23,884 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1] [2018-10-04 09:25:23,884 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:23,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:23,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810823, now seen corresponding path program 4 times [2018-10-04 09:25:23,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:23,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:23,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:23,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:23,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:23,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:23,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:23,980 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:25:23,988 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:25:23,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:23,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:24,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:24,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:25:24,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:25:24,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:25:24,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:25:24,027 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-10-04 09:25:24,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:24,074 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-10-04 09:25:24,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:25:24,075 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-10-04 09:25:24,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:24,076 INFO L225 Difference]: With dead ends: 26 [2018-10-04 09:25:24,076 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 09:25:24,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:25:24,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 09:25:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 09:25:24,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:25:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-04 09:25:24,082 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2018-10-04 09:25:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:24,082 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-04 09:25:24,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:25:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-04 09:25:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 09:25:24,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:24,083 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1] [2018-10-04 09:25:24,083 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:24,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:24,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561067, now seen corresponding path program 5 times [2018-10-04 09:25:24,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:24,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:24,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:24,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:24,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:24,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:24,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:24,278 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:25:24,294 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:25:24,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:24,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:24,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:24,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:25:24,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:25:24,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:25:24,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:25:24,333 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2018-10-04 09:25:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:24,387 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-10-04 09:25:24,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:25:24,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-10-04 09:25:24,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:24,388 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:25:24,388 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:25:24,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:25:24,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:25:24,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 09:25:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 09:25:24,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-10-04 09:25:24,392 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-10-04 09:25:24,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:24,393 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-10-04 09:25:24,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:25:24,393 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-10-04 09:25:24,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 09:25:24,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:24,394 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1] [2018-10-04 09:25:24,394 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:24,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:24,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561005, now seen corresponding path program 5 times [2018-10-04 09:25:24,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:24,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:24,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:24,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:24,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:24,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:24,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:24,547 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:25:24,572 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:25:24,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:24,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:24,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:24,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:25:24,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:25:24,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:25:24,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:25:24,603 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2018-10-04 09:25:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:24,653 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-10-04 09:25:24,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:25:24,653 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-10-04 09:25:24,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:24,654 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:25:24,654 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 09:25:24,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:25:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 09:25:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 09:25:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 09:25:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-04 09:25:24,658 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-10-04 09:25:24,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:24,659 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-04 09:25:24,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:25:24,659 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-04 09:25:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 09:25:24,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:24,660 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1] [2018-10-04 09:25:24,660 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:24,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:24,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1729447159, now seen corresponding path program 6 times [2018-10-04 09:25:24,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:24,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:24,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:24,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:24,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:24,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:24,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:24,846 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:25:24,870 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:25:24,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:24,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:25,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:25,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-04 09:25:25,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:25:25,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:25:25,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:25:25,119 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 17 states. [2018-10-04 09:25:25,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:25,504 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2018-10-04 09:25:25,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:25:25,505 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-10-04 09:25:25,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:25,505 INFO L225 Difference]: With dead ends: 32 [2018-10-04 09:25:25,506 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 09:25:25,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:25:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 09:25:25,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 09:25:25,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:25:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-04 09:25:25,513 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-10-04 09:25:25,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:25,513 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-04 09:25:25,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:25:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-04 09:25:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 09:25:25,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:25,514 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1] [2018-10-04 09:25:25,515 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:25,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:25,515 INFO L82 PathProgramCache]: Analyzing trace with hash 468808085, now seen corresponding path program 7 times [2018-10-04 09:25:25,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:25,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:25,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:25,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:25,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:25,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:25,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:25,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:25,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:25,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:25,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:25:25,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:25:25,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:25:25,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:25:25,862 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2018-10-04 09:25:25,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:25,900 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-10-04 09:25:25,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:25:25,901 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-10-04 09:25:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:25,901 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:25:25,901 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:25:25,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:25:25,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:25:25,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 09:25:25,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 09:25:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-10-04 09:25:25,907 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-10-04 09:25:25,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:25,907 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-10-04 09:25:25,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:25:25,907 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-10-04 09:25:25,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 09:25:25,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:25,908 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1] [2018-10-04 09:25:25,909 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:25,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:25,909 INFO L82 PathProgramCache]: Analyzing trace with hash 468808147, now seen corresponding path program 6 times [2018-10-04 09:25:25,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:25,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:25,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:25,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:25,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:26,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:26,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:26,077 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:25:26,093 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:25:26,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:26,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:26,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:26,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:25:26,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:25:26,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:25:26,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:25:26,127 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 11 states. [2018-10-04 09:25:26,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:26,174 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-10-04 09:25:26,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:25:26,174 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2018-10-04 09:25:26,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:26,175 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:25:26,175 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:25:26,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:25:26,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:25:26,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 09:25:26,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 09:25:26,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-04 09:25:26,180 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2018-10-04 09:25:26,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:26,181 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-04 09:25:26,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:25:26,181 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-04 09:25:26,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 09:25:26,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:26,182 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1] [2018-10-04 09:25:26,182 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:26,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:26,183 INFO L82 PathProgramCache]: Analyzing trace with hash -970547319, now seen corresponding path program 8 times [2018-10-04 09:25:26,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:26,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:26,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:26,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:26,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:26,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:26,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:26,311 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:25:26,350 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:25:26,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:26,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:26,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:26,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:25:26,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:25:26,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:25:26,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:25:26,382 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2018-10-04 09:25:26,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:26,427 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2018-10-04 09:25:26,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:25:26,427 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-10-04 09:25:26,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:26,428 INFO L225 Difference]: With dead ends: 36 [2018-10-04 09:25:26,428 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 09:25:26,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:25:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 09:25:26,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 09:25:26,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:25:26,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-04 09:25:26,433 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-10-04 09:25:26,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:26,434 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-04 09:25:26,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:25:26,434 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-04 09:25:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 09:25:26,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:26,435 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1] [2018-10-04 09:25:26,435 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:26,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:26,436 INFO L82 PathProgramCache]: Analyzing trace with hash -970547257, now seen corresponding path program 7 times [2018-10-04 09:25:26,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:26,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:26,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:26,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:26,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:26,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:26,607 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:26,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:26,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:26,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:26,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:25:26,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:25:26,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:25:26,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:25:26,687 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2018-10-04 09:25:26,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:26,720 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-10-04 09:25:26,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:25:26,726 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2018-10-04 09:25:26,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:26,727 INFO L225 Difference]: With dead ends: 38 [2018-10-04 09:25:26,727 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 09:25:26,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:25:26,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 09:25:26,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 09:25:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:25:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-04 09:25:26,731 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2018-10-04 09:25:26,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:26,732 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-04 09:25:26,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:25:26,732 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-04 09:25:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 09:25:26,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:26,733 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1] [2018-10-04 09:25:26,733 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:26,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:26,734 INFO L82 PathProgramCache]: Analyzing trace with hash 146095381, now seen corresponding path program 9 times [2018-10-04 09:25:26,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:26,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:26,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:26,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:26,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:26,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:26,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:26,908 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:25:27,050 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-04 09:25:27,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:27,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:27,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:27,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-04 09:25:27,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:25:27,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:25:27,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:25:27,487 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 23 states. [2018-10-04 09:25:28,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:28,204 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2018-10-04 09:25:28,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:25:28,205 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2018-10-04 09:25:28,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:28,206 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:25:28,206 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:25:28,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=603, Invalid=1203, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:25:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:25:28,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 09:25:28,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 09:25:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-10-04 09:25:28,213 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2018-10-04 09:25:28,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:28,214 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-10-04 09:25:28,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:25:28,214 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-10-04 09:25:28,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 09:25:28,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:28,215 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1] [2018-10-04 09:25:28,215 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:28,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:28,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1527063561, now seen corresponding path program 10 times [2018-10-04 09:25:28,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:28,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:28,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:28,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:28,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:28,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:28,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:28,410 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:25:28,422 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:25:28,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:28,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:28,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:28,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-04 09:25:28,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 09:25:28,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 09:25:28,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:25:28,629 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 25 states. [2018-10-04 09:25:29,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:29,043 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-10-04 09:25:29,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:25:29,043 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2018-10-04 09:25:29,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:29,044 INFO L225 Difference]: With dead ends: 44 [2018-10-04 09:25:29,044 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 09:25:29,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:25:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 09:25:29,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 09:25:29,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 09:25:29,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-04 09:25:29,049 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2018-10-04 09:25:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:29,049 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-04 09:25:29,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 09:25:29,050 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-04 09:25:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 09:25:29,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:29,050 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1] [2018-10-04 09:25:29,051 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:29,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:29,051 INFO L82 PathProgramCache]: Analyzing trace with hash 458385557, now seen corresponding path program 11 times [2018-10-04 09:25:29,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:29,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:29,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:29,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:29,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:29,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:29,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:29,228 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:25:29,261 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 09:25:29,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:29,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:29,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:29,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 09:25:29,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:25:29,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:25:29,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:25:29,305 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2018-10-04 09:25:29,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:29,395 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-10-04 09:25:29,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:25:29,399 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-10-04 09:25:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:29,399 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:25:29,399 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:25:29,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:25:29,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:25:29,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 09:25:29,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 09:25:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-10-04 09:25:29,404 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-10-04 09:25:29,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:29,404 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-10-04 09:25:29,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:25:29,404 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-10-04 09:25:29,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 09:25:29,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:29,405 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1] [2018-10-04 09:25:29,405 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:29,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:29,406 INFO L82 PathProgramCache]: Analyzing trace with hash 458385619, now seen corresponding path program 8 times [2018-10-04 09:25:29,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:29,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:29,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:29,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:29,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:29,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:29,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:29,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:25:29,604 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:25:29,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:29,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:29,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:29,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 09:25:29,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:25:29,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:25:29,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:25:29,637 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-10-04 09:25:29,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:29,702 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2018-10-04 09:25:29,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:25:29,702 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2018-10-04 09:25:29,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:29,703 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:25:29,703 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:25:29,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:25:29,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:25:29,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 09:25:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 09:25:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-04 09:25:29,709 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2018-10-04 09:25:29,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:29,710 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-04 09:25:29,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:25:29,710 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-04 09:25:29,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 09:25:29,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:29,711 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1] [2018-10-04 09:25:29,711 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:29,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:29,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2064533641, now seen corresponding path program 12 times [2018-10-04 09:25:29,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:29,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:29,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:29,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:29,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:30,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:30,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:30,396 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:25:30,431 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-04 09:25:30,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:30,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:30,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:30,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-04 09:25:30,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:25:30,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:25:30,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:25:30,783 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 29 states. [2018-10-04 09:25:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:31,546 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2018-10-04 09:25:31,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:25:31,547 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 41 [2018-10-04 09:25:31,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:31,548 INFO L225 Difference]: With dead ends: 50 [2018-10-04 09:25:31,549 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 09:25:31,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=978, Invalid=1992, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:25:31,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 09:25:31,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 09:25:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 09:25:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-04 09:25:31,555 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2018-10-04 09:25:31,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:31,555 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-04 09:25:31,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:25:31,556 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-04 09:25:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 09:25:31,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:31,556 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1] [2018-10-04 09:25:31,557 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:31,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:31,557 INFO L82 PathProgramCache]: Analyzing trace with hash 591459349, now seen corresponding path program 13 times [2018-10-04 09:25:31,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:31,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:31,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:31,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:31,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:31,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:31,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:31,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:31,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:31,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:31,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:25:31,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:25:31,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:25:31,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:25:31,871 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2018-10-04 09:25:31,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:31,924 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-10-04 09:25:31,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:25:31,924 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-04 09:25:31,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:31,925 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:25:31,925 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:25:31,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:25:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:25:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 09:25:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 09:25:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-10-04 09:25:31,930 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-10-04 09:25:31,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:31,931 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-10-04 09:25:31,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:25:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-10-04 09:25:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 09:25:31,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:31,932 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1] [2018-10-04 09:25:31,932 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:31,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:31,932 INFO L82 PathProgramCache]: Analyzing trace with hash 591459411, now seen corresponding path program 9 times [2018-10-04 09:25:31,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:31,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:31,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:31,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:31,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:32,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:32,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:32,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:25:32,199 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 09:25:32,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:32,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:32,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:32,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:25:32,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:25:32,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:25:32,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:25:32,239 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2018-10-04 09:25:32,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:32,495 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2018-10-04 09:25:32,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:25:32,496 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-10-04 09:25:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:32,497 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:25:32,497 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:25:32,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:25:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:25:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 09:25:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 09:25:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-10-04 09:25:32,502 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2018-10-04 09:25:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:32,503 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-10-04 09:25:32,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:25:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-10-04 09:25:32,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 09:25:32,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:32,504 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1] [2018-10-04 09:25:32,504 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:32,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:32,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910391, now seen corresponding path program 14 times [2018-10-04 09:25:32,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:32,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:32,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:32,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:32,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:32,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:32,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:32,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:25:32,690 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:25:32,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:32,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:32,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:32,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 09:25:32,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:25:32,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:25:32,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:25:32,730 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2018-10-04 09:25:32,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:32,776 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2018-10-04 09:25:32,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:25:32,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2018-10-04 09:25:32,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:32,777 INFO L225 Difference]: With dead ends: 54 [2018-10-04 09:25:32,778 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 09:25:32,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:25:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 09:25:32,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 09:25:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 09:25:32,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-04 09:25:32,782 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-10-04 09:25:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:32,782 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-04 09:25:32,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:25:32,782 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-04 09:25:32,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 09:25:32,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:32,783 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1] [2018-10-04 09:25:32,783 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:32,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:32,783 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910329, now seen corresponding path program 10 times [2018-10-04 09:25:32,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:32,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:32,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:32,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:32,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:33,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:33,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:33,020 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:25:33,047 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:25:33,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:33,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:33,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:33,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 09:25:33,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:25:33,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:25:33,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:25:33,089 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 18 states. [2018-10-04 09:25:33,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:33,207 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2018-10-04 09:25:33,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:25:33,208 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2018-10-04 09:25:33,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:33,208 INFO L225 Difference]: With dead ends: 56 [2018-10-04 09:25:33,208 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 09:25:33,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:25:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 09:25:33,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 09:25:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 09:25:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-04 09:25:33,212 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2018-10-04 09:25:33,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:33,212 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-04 09:25:33,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:25:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-04 09:25:33,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 09:25:33,213 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:33,213 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1] [2018-10-04 09:25:33,214 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:33,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:33,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1979244437, now seen corresponding path program 15 times [2018-10-04 09:25:33,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:33,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:33,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:33,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:33,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:33,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:33,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:33,852 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:25:33,880 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-10-04 09:25:33,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:33,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:34,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:34,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-04 09:25:34,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 09:25:34,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 09:25:34,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:25:34,192 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 35 states. [2018-10-04 09:25:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:35,555 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-10-04 09:25:35,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:25:35,556 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 50 [2018-10-04 09:25:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:35,556 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:25:35,557 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:25:35,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1443, Invalid=2979, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 09:25:35,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:25:35,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 09:25:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 09:25:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-10-04 09:25:35,563 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2018-10-04 09:25:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:35,563 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-10-04 09:25:35,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 09:25:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-10-04 09:25:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 09:25:35,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:35,564 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1] [2018-10-04 09:25:35,564 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:35,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:35,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545079, now seen corresponding path program 16 times [2018-10-04 09:25:35,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:35,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:35,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:35,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:35,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:35,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:35,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:35,747 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:25:35,765 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:25:35,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:35,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:35,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:35,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 09:25:35,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:25:35,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:25:35,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:25:35,798 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 19 states. [2018-10-04 09:25:35,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:35,868 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-10-04 09:25:35,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:25:35,869 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2018-10-04 09:25:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:35,870 INFO L225 Difference]: With dead ends: 60 [2018-10-04 09:25:35,870 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 09:25:35,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:25:35,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 09:25:35,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 09:25:35,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 09:25:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-04 09:25:35,874 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-10-04 09:25:35,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:35,875 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-04 09:25:35,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:25:35,875 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-04 09:25:35,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 09:25:35,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:35,875 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1] [2018-10-04 09:25:35,875 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:35,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:35,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545017, now seen corresponding path program 11 times [2018-10-04 09:25:35,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:35,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:35,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:35,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:35,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:36,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:36,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:36,087 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:25:36,114 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 09:25:36,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:36,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:36,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:36,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 09:25:36,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:25:36,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:25:36,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:25:36,158 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2018-10-04 09:25:36,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:36,236 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2018-10-04 09:25:36,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:25:36,237 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2018-10-04 09:25:36,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:36,238 INFO L225 Difference]: With dead ends: 62 [2018-10-04 09:25:36,238 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 09:25:36,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:25:36,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 09:25:36,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 09:25:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 09:25:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-10-04 09:25:36,242 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2018-10-04 09:25:36,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:36,242 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-10-04 09:25:36,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:25:36,243 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-10-04 09:25:36,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 09:25:36,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:36,243 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1] [2018-10-04 09:25:36,243 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:36,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:36,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364501, now seen corresponding path program 17 times [2018-10-04 09:25:36,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:36,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:36,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:36,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:36,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:36,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:36,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:36,491 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:25:36,522 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 09:25:36,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:36,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:36,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:36,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 09:25:36,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:25:36,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:25:36,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:25:36,571 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 20 states. [2018-10-04 09:25:36,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:36,650 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-10-04 09:25:36,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:25:36,650 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2018-10-04 09:25:36,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:36,651 INFO L225 Difference]: With dead ends: 63 [2018-10-04 09:25:36,651 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:25:36,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:25:36,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:25:36,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 09:25:36,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 09:25:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-04 09:25:36,656 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-10-04 09:25:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:36,657 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-04 09:25:36,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:25:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-04 09:25:36,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 09:25:36,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:36,657 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1] [2018-10-04 09:25:36,658 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:36,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:36,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364563, now seen corresponding path program 12 times [2018-10-04 09:25:36,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:36,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:36,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:36,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:36,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:36,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:36,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:36,887 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:25:36,918 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 09:25:36,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:36,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:36,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:36,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 09:25:36,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 09:25:36,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 09:25:36,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:25:36,967 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 21 states. [2018-10-04 09:25:37,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:37,068 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2018-10-04 09:25:37,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:25:37,068 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2018-10-04 09:25:37,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:37,069 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:25:37,069 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 09:25:37,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:25:37,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 09:25:37,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 09:25:37,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 09:25:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-10-04 09:25:37,074 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2018-10-04 09:25:37,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:37,074 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-10-04 09:25:37,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 09:25:37,075 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-10-04 09:25:37,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 09:25:37,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:37,076 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1] [2018-10-04 09:25:37,076 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:37,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:37,076 INFO L82 PathProgramCache]: Analyzing trace with hash -411470327, now seen corresponding path program 18 times [2018-10-04 09:25:37,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:37,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:37,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:37,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:37,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 19 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:37,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:37,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:37,697 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:25:37,726 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-04 09:25:37,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:37,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:38,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:38,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-04 09:25:38,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:25:38,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:25:38,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:25:38,076 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 41 states. [2018-10-04 09:25:39,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:39,106 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-10-04 09:25:39,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:25:39,106 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 59 [2018-10-04 09:25:39,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:39,107 INFO L225 Difference]: With dead ends: 68 [2018-10-04 09:25:39,108 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 09:25:39,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1998, Invalid=4164, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 09:25:39,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 09:25:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 09:25:39,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 09:25:39,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-10-04 09:25:39,114 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2018-10-04 09:25:39,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:39,114 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-10-04 09:25:39,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:25:39,114 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-10-04 09:25:39,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 09:25:39,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:39,115 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1] [2018-10-04 09:25:39,115 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:39,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:39,115 INFO L82 PathProgramCache]: Analyzing trace with hash -274409835, now seen corresponding path program 19 times [2018-10-04 09:25:39,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:39,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:39,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:39,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:39,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:39,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:39,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:39,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:39,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:39,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:39,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 09:25:39,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:25:39,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:25:39,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:25:39,541 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 22 states. [2018-10-04 09:25:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:39,578 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2018-10-04 09:25:39,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:25:39,579 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2018-10-04 09:25:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:39,580 INFO L225 Difference]: With dead ends: 69 [2018-10-04 09:25:39,580 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 09:25:39,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:25:39,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 09:25:39,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 09:25:39,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 09:25:39,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-10-04 09:25:39,584 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-10-04 09:25:39,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:39,585 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-10-04 09:25:39,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:25:39,585 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-10-04 09:25:39,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 09:25:39,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:39,586 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1] [2018-10-04 09:25:39,586 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:39,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:39,586 INFO L82 PathProgramCache]: Analyzing trace with hash -274409773, now seen corresponding path program 13 times [2018-10-04 09:25:39,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:39,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:39,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:39,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:39,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:40,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:40,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:40,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:40,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:40,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:40,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 09:25:40,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:25:40,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:25:40,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:25:40,556 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 23 states. [2018-10-04 09:25:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:40,613 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2018-10-04 09:25:40,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:25:40,614 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2018-10-04 09:25:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:40,614 INFO L225 Difference]: With dead ends: 71 [2018-10-04 09:25:40,615 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 09:25:40,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:25:40,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 09:25:40,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 09:25:40,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 09:25:40,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-10-04 09:25:40,618 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2018-10-04 09:25:40,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:40,619 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-10-04 09:25:40,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:25:40,619 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-10-04 09:25:40,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 09:25:40,619 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:40,619 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1] [2018-10-04 09:25:40,620 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:40,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:40,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191159, now seen corresponding path program 20 times [2018-10-04 09:25:40,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:40,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:40,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:40,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:40,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:41,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:41,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:41,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:25:41,037 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:25:41,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:41,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:41,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:41,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 09:25:41,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:25:41,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:25:41,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:25:41,072 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 23 states. [2018-10-04 09:25:41,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:41,115 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-10-04 09:25:41,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:25:41,116 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2018-10-04 09:25:41,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:41,117 INFO L225 Difference]: With dead ends: 72 [2018-10-04 09:25:41,117 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 09:25:41,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:25:41,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 09:25:41,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 09:25:41,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 09:25:41,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-10-04 09:25:41,121 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-10-04 09:25:41,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:41,121 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-10-04 09:25:41,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:25:41,121 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-10-04 09:25:41,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 09:25:41,122 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:41,122 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1] [2018-10-04 09:25:41,122 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:41,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:41,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191097, now seen corresponding path program 14 times [2018-10-04 09:25:41,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:41,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:41,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:41,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:41,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:41,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:41,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:41,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:25:41,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:25:41,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:41,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:41,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:41,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 09:25:41,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:25:41,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:25:41,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:25:41,479 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 24 states. [2018-10-04 09:25:41,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:41,560 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2018-10-04 09:25:41,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:25:41,560 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2018-10-04 09:25:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:41,561 INFO L225 Difference]: With dead ends: 74 [2018-10-04 09:25:41,561 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 09:25:41,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:25:41,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 09:25:41,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 09:25:41,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 09:25:41,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-04 09:25:41,566 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2018-10-04 09:25:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:41,566 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-04 09:25:41,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:25:41,567 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-04 09:25:41,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 09:25:41,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:41,567 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1] [2018-10-04 09:25:41,568 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:41,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:41,568 INFO L82 PathProgramCache]: Analyzing trace with hash -544677355, now seen corresponding path program 21 times [2018-10-04 09:25:41,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:41,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:41,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:41,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:41,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 22 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:41,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:41,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:41,892 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:25:41,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-10-04 09:25:41,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:41,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:42,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:42,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-04 09:25:42,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:25:42,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:25:42,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:25:42,505 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 47 states. [2018-10-04 09:25:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:43,598 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2018-10-04 09:25:43,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:25:43,598 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 68 [2018-10-04 09:25:43,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:43,599 INFO L225 Difference]: With dead ends: 77 [2018-10-04 09:25:43,599 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 09:25:43,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2643, Invalid=5547, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 09:25:43,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 09:25:43,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 09:25:43,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 09:25:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-04 09:25:43,605 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2018-10-04 09:25:43,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:43,605 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-04 09:25:43,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:25:43,606 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-04 09:25:43,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 09:25:43,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:43,606 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1] [2018-10-04 09:25:43,606 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:43,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:43,607 INFO L82 PathProgramCache]: Analyzing trace with hash -95199479, now seen corresponding path program 22 times [2018-10-04 09:25:43,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:43,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:43,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:43,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:43,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 23 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:43,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:43,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:43,972 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:25:44,002 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:25:44,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:44,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:44,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:44,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-04 09:25:44,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 09:25:44,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 09:25:44,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:25:44,467 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 49 states. [2018-10-04 09:25:45,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:45,972 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-10-04 09:25:45,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:25:45,973 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 71 [2018-10-04 09:25:45,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:45,974 INFO L225 Difference]: With dead ends: 80 [2018-10-04 09:25:45,974 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 09:25:45,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2878, Invalid=6052, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 09:25:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 09:25:45,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 09:25:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 09:25:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-04 09:25:45,981 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2018-10-04 09:25:45,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:45,981 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-04 09:25:45,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 09:25:45,981 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-04 09:25:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 09:25:45,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:45,981 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1] [2018-10-04 09:25:45,982 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:45,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:45,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824491, now seen corresponding path program 23 times [2018-10-04 09:25:45,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:45,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:45,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:45,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:45,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:46,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:46,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:46,307 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:25:46,345 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 09:25:46,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:46,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:46,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:46,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 09:25:46,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:25:46,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:25:46,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:25:46,384 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 26 states. [2018-10-04 09:25:46,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:46,482 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2018-10-04 09:25:46,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:25:46,482 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2018-10-04 09:25:46,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:46,483 INFO L225 Difference]: With dead ends: 81 [2018-10-04 09:25:46,483 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 09:25:46,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:25:46,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 09:25:46,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 09:25:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 09:25:46,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-10-04 09:25:46,488 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-10-04 09:25:46,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:46,488 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-10-04 09:25:46,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:25:46,488 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-10-04 09:25:46,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 09:25:46,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:46,489 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1] [2018-10-04 09:25:46,489 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:46,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:46,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824429, now seen corresponding path program 15 times [2018-10-04 09:25:46,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:46,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:46,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:46,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:46,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:47,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:47,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:47,191 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:25:47,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-04 09:25:47,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:47,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:47,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:47,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 09:25:47,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 09:25:47,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 09:25:47,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:25:47,281 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 27 states. [2018-10-04 09:25:47,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:47,328 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2018-10-04 09:25:47,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:25:47,328 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2018-10-04 09:25:47,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:47,330 INFO L225 Difference]: With dead ends: 83 [2018-10-04 09:25:47,330 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 09:25:47,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:25:47,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 09:25:47,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 09:25:47,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 09:25:47,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-10-04 09:25:47,335 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2018-10-04 09:25:47,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:47,335 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-10-04 09:25:47,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 09:25:47,335 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-10-04 09:25:47,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 09:25:47,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:47,336 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1] [2018-10-04 09:25:47,336 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:47,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:47,337 INFO L82 PathProgramCache]: Analyzing trace with hash -142326903, now seen corresponding path program 24 times [2018-10-04 09:25:47,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:47,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:47,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:47,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:47,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 25 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:47,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:47,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:47,745 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:25:47,791 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-04 09:25:47,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:47,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:48,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:48,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-04 09:25:48,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:25:48,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:25:48,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:25:48,333 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 53 states. [2018-10-04 09:25:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:49,671 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2018-10-04 09:25:49,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:25:49,672 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 77 [2018-10-04 09:25:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:49,673 INFO L225 Difference]: With dead ends: 86 [2018-10-04 09:25:49,673 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 09:25:49,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3378, Invalid=7128, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 09:25:49,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 09:25:49,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 09:25:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 09:25:49,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-10-04 09:25:49,683 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2018-10-04 09:25:49,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:49,683 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-10-04 09:25:49,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:25:49,683 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-10-04 09:25:49,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 09:25:49,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:49,684 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1] [2018-10-04 09:25:49,684 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:49,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:49,684 INFO L82 PathProgramCache]: Analyzing trace with hash -926607083, now seen corresponding path program 25 times [2018-10-04 09:25:49,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:49,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:49,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:49,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:49,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:50,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:50,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:50,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:50,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:50,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:50,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 09:25:50,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:25:50,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:25:50,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:25:50,213 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 28 states. [2018-10-04 09:25:50,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:50,317 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2018-10-04 09:25:50,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:25:50,318 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2018-10-04 09:25:50,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:50,318 INFO L225 Difference]: With dead ends: 87 [2018-10-04 09:25:50,319 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 09:25:50,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:25:50,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 09:25:50,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 09:25:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 09:25:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-10-04 09:25:50,322 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-10-04 09:25:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:50,323 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-10-04 09:25:50,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:25:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-10-04 09:25:50,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 09:25:50,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:50,324 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1] [2018-10-04 09:25:50,324 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:50,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:50,324 INFO L82 PathProgramCache]: Analyzing trace with hash -926607021, now seen corresponding path program 16 times [2018-10-04 09:25:50,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:50,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:50,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:50,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:50,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:50,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:50,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:50,832 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:25:50,857 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:25:50,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:50,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:50,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:50,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 09:25:50,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:25:50,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:25:50,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:25:50,892 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 29 states. [2018-10-04 09:25:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:51,064 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2018-10-04 09:25:51,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:25:51,064 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 80 [2018-10-04 09:25:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:51,065 INFO L225 Difference]: With dead ends: 89 [2018-10-04 09:25:51,066 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 09:25:51,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:25:51,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 09:25:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 09:25:51,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 09:25:51,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-10-04 09:25:51,070 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2018-10-04 09:25:51,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:51,071 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-10-04 09:25:51,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:25:51,071 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-10-04 09:25:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 09:25:51,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:51,071 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1] [2018-10-04 09:25:51,072 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:51,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:51,072 INFO L82 PathProgramCache]: Analyzing trace with hash -795359223, now seen corresponding path program 26 times [2018-10-04 09:25:51,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:51,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:51,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:51,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:51,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:51,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:51,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:51,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:25:51,518 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:25:51,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:51,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:51,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:51,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 09:25:51,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:25:51,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:25:51,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:25:51,556 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 29 states. [2018-10-04 09:25:51,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:51,634 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2018-10-04 09:25:51,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:25:51,635 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2018-10-04 09:25:51,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:51,636 INFO L225 Difference]: With dead ends: 90 [2018-10-04 09:25:51,636 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 09:25:51,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:25:51,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 09:25:51,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 09:25:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 09:25:51,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-04 09:25:51,641 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-10-04 09:25:51,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:51,642 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-04 09:25:51,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:25:51,642 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-04 09:25:51,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 09:25:51,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:51,643 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1] [2018-10-04 09:25:51,643 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:51,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:51,643 INFO L82 PathProgramCache]: Analyzing trace with hash -795359161, now seen corresponding path program 17 times [2018-10-04 09:25:51,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:51,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:51,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:51,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:51,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:52,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:52,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:52,286 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:25:52,331 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 09:25:52,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:52,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:52,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:52,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 09:25:52,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:25:52,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:25:52,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:25:52,374 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 30 states. [2018-10-04 09:25:52,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:52,423 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2018-10-04 09:25:52,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:25:52,424 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2018-10-04 09:25:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:52,425 INFO L225 Difference]: With dead ends: 92 [2018-10-04 09:25:52,425 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 09:25:52,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:25:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 09:25:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 09:25:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 09:25:52,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-10-04 09:25:52,429 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2018-10-04 09:25:52,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:52,430 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-10-04 09:25:52,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:25:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-10-04 09:25:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 09:25:52,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:52,430 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1] [2018-10-04 09:25:52,430 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:52,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:52,431 INFO L82 PathProgramCache]: Analyzing trace with hash 789398677, now seen corresponding path program 27 times [2018-10-04 09:25:52,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:52,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:52,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:52,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:52,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 28 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:52,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:52,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:52,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:25:52,850 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-10-04 09:25:52,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:52,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:53,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:53,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-04 09:25:53,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 09:25:53,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 09:25:53,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=2523, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:25:53,504 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 59 states. [2018-10-04 09:25:55,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:55,255 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2018-10-04 09:25:55,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:25:55,255 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 86 [2018-10-04 09:25:55,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:55,256 INFO L225 Difference]: With dead ends: 95 [2018-10-04 09:25:55,257 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 09:25:55,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4203, Invalid=8907, Unknown=0, NotChecked=0, Total=13110 [2018-10-04 09:25:55,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 09:25:55,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 09:25:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 09:25:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-04 09:25:55,261 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-10-04 09:25:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:55,261 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-04 09:25:55,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 09:25:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-04 09:25:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 09:25:55,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:55,262 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1] [2018-10-04 09:25:55,262 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:55,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:55,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2031479945, now seen corresponding path program 28 times [2018-10-04 09:25:55,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:55,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:55,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:55,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:55,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:55,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:55,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:55,960 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:25:55,988 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:25:55,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:55,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:56,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:56,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 09:25:56,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 09:25:56,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 09:25:56,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:25:56,024 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 31 states. [2018-10-04 09:25:56,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:56,123 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2018-10-04 09:25:56,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:25:56,123 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 89 [2018-10-04 09:25:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:56,124 INFO L225 Difference]: With dead ends: 96 [2018-10-04 09:25:56,124 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 09:25:56,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:25:56,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 09:25:56,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 09:25:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 09:25:56,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-10-04 09:25:56,128 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-10-04 09:25:56,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:56,129 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-10-04 09:25:56,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 09:25:56,129 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-10-04 09:25:56,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 09:25:56,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:56,129 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1] [2018-10-04 09:25:56,130 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:56,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:56,130 INFO L82 PathProgramCache]: Analyzing trace with hash 2031480007, now seen corresponding path program 18 times [2018-10-04 09:25:56,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:56,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:56,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:56,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:56,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:56,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:56,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:56,812 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:25:56,861 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-10-04 09:25:56,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:56,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:56,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:56,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 09:25:56,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:25:56,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:25:56,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:25:56,929 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 32 states. [2018-10-04 09:25:57,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:57,277 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2018-10-04 09:25:57,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:25:57,277 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2018-10-04 09:25:57,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:57,278 INFO L225 Difference]: With dead ends: 98 [2018-10-04 09:25:57,278 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 09:25:57,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:25:57,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 09:25:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 09:25:57,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 09:25:57,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-04 09:25:57,286 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2018-10-04 09:25:57,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:57,286 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-04 09:25:57,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:25:57,287 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-04 09:25:57,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 09:25:57,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:57,288 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1] [2018-10-04 09:25:57,289 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:57,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:57,289 INFO L82 PathProgramCache]: Analyzing trace with hash -563687403, now seen corresponding path program 29 times [2018-10-04 09:25:57,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:57,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:57,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:57,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:57,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:57,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:57,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:57,998 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:25:58,058 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 09:25:58,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:58,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:58,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:58,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 09:25:58,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:25:58,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:25:58,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:25:58,097 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 32 states. [2018-10-04 09:25:58,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:58,192 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2018-10-04 09:25:58,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:25:58,192 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2018-10-04 09:25:58,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:58,193 INFO L225 Difference]: With dead ends: 99 [2018-10-04 09:25:58,193 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 09:25:58,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:25:58,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 09:25:58,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 09:25:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 09:25:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-10-04 09:25:58,197 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-10-04 09:25:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:58,198 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-10-04 09:25:58,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:25:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-10-04 09:25:58,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 09:25:58,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:58,199 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1] [2018-10-04 09:25:58,199 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:58,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:58,199 INFO L82 PathProgramCache]: Analyzing trace with hash -563687341, now seen corresponding path program 19 times [2018-10-04 09:25:58,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:58,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:58,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:58,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:58,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:58,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:58,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:58,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:58,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:58,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:58,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 09:25:58,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 09:25:58,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 09:25:58,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:25:58,921 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2018-10-04 09:25:58,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:58,994 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2018-10-04 09:25:58,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:25:58,995 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 92 [2018-10-04 09:25:58,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:58,996 INFO L225 Difference]: With dead ends: 101 [2018-10-04 09:25:58,996 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 09:25:58,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:25:58,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 09:25:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 09:25:59,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 09:25:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-10-04 09:25:59,001 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2018-10-04 09:25:59,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:59,001 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-10-04 09:25:59,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 09:25:59,001 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-10-04 09:25:59,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 09:25:59,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:59,002 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1] [2018-10-04 09:25:59,002 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:59,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:59,003 INFO L82 PathProgramCache]: Analyzing trace with hash 512143625, now seen corresponding path program 30 times [2018-10-04 09:25:59,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:59,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:59,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:59,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:59,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 31 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:59,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:59,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:59,673 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:25:59,726 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-04 09:25:59,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:59,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:00,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:00,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-04 09:26:00,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 09:26:00,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 09:26:00,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1088, Invalid=3072, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:26:00,985 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 65 states. [2018-10-04 09:26:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:03,061 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2018-10-04 09:26:03,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 09:26:03,062 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 95 [2018-10-04 09:26:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:03,063 INFO L225 Difference]: With dead ends: 104 [2018-10-04 09:26:03,063 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 09:26:03,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5118, Invalid=10884, Unknown=0, NotChecked=0, Total=16002 [2018-10-04 09:26:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 09:26:03,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 09:26:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 09:26:03,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-04 09:26:03,069 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2018-10-04 09:26:03,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:03,069 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-04 09:26:03,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 09:26:03,069 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-04 09:26:03,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 09:26:03,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:03,070 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1] [2018-10-04 09:26:03,070 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:03,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:03,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336021, now seen corresponding path program 31 times [2018-10-04 09:26:03,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:03,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:03,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:03,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:03,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:04,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:04,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:04,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:04,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:04,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:04,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 09:26:04,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:26:04,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:26:04,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:26:04,378 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 34 states. [2018-10-04 09:26:04,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:04,641 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2018-10-04 09:26:04,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:26:04,641 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2018-10-04 09:26:04,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:04,642 INFO L225 Difference]: With dead ends: 105 [2018-10-04 09:26:04,642 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 09:26:04,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:26:04,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 09:26:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 09:26:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 09:26:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-04 09:26:04,647 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-10-04 09:26:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:04,648 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-04 09:26:04,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:26:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-04 09:26:04,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 09:26:04,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:04,648 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1] [2018-10-04 09:26:04,649 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:04,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:04,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336083, now seen corresponding path program 20 times [2018-10-04 09:26:04,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:04,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:04,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:04,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:04,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:05,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:05,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:05,885 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:05,914 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:05,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:05,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:05,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:05,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 09:26:05,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 09:26:05,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 09:26:05,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:26:05,950 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 35 states. [2018-10-04 09:26:06,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:06,081 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2018-10-04 09:26:06,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:26:06,081 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 98 [2018-10-04 09:26:06,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:06,082 INFO L225 Difference]: With dead ends: 107 [2018-10-04 09:26:06,082 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 09:26:06,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:26:06,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 09:26:06,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 09:26:06,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 09:26:06,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-10-04 09:26:06,087 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2018-10-04 09:26:06,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:06,087 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-10-04 09:26:06,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 09:26:06,087 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-10-04 09:26:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 09:26:06,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:06,088 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1] [2018-10-04 09:26:06,088 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:06,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:06,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918391, now seen corresponding path program 32 times [2018-10-04 09:26:06,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:06,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:06,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:06,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:06,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:06,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:06,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:06,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:06,978 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:06,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:06,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:07,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:07,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 09:26:07,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 09:26:07,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 09:26:07,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:26:07,015 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 35 states. [2018-10-04 09:26:07,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:07,186 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2018-10-04 09:26:07,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:26:07,186 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 101 [2018-10-04 09:26:07,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:07,188 INFO L225 Difference]: With dead ends: 108 [2018-10-04 09:26:07,188 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 09:26:07,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:26:07,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 09:26:07,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 09:26:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 09:26:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-10-04 09:26:07,194 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-10-04 09:26:07,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:07,194 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-10-04 09:26:07,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 09:26:07,194 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-10-04 09:26:07,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 09:26:07,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:07,195 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1] [2018-10-04 09:26:07,195 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:07,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:07,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918329, now seen corresponding path program 21 times [2018-10-04 09:26:07,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:07,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:07,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:07,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:07,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:07,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:07,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:07,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:08,208 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 09:26:08,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:08,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:08,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:08,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 09:26:08,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:26:08,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:26:08,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:26:08,263 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 36 states. [2018-10-04 09:26:08,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:08,393 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2018-10-04 09:26:08,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:26:08,393 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 101 [2018-10-04 09:26:08,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:08,394 INFO L225 Difference]: With dead ends: 110 [2018-10-04 09:26:08,394 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 09:26:08,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:26:08,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 09:26:08,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 09:26:08,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 09:26:08,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-04 09:26:08,399 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2018-10-04 09:26:08,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:08,399 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-04 09:26:08,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:26:08,399 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-04 09:26:08,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 09:26:08,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:08,400 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1] [2018-10-04 09:26:08,400 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:08,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:08,400 INFO L82 PathProgramCache]: Analyzing trace with hash 875431701, now seen corresponding path program 33 times [2018-10-04 09:26:08,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:08,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:08,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:08,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:08,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 34 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:09,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:09,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:09,243 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:09,300 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-10-04 09:26:09,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:09,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:10,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:10,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-04 09:26:10,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 09:26:10,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 09:26:10,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:26:10,231 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 71 states. [2018-10-04 09:26:12,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:12,687 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2018-10-04 09:26:12,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 09:26:12,688 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 104 [2018-10-04 09:26:12,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:12,689 INFO L225 Difference]: With dead ends: 113 [2018-10-04 09:26:12,689 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 09:26:12,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3433 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6123, Invalid=13059, Unknown=0, NotChecked=0, Total=19182 [2018-10-04 09:26:12,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 09:26:12,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 09:26:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 09:26:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-10-04 09:26:12,693 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2018-10-04 09:26:12,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:12,694 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-10-04 09:26:12,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 09:26:12,694 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-10-04 09:26:12,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 09:26:12,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:12,695 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1] [2018-10-04 09:26:12,695 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:12,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:12,695 INFO L82 PathProgramCache]: Analyzing trace with hash 945822217, now seen corresponding path program 34 times [2018-10-04 09:26:12,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:12,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:12,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:12,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:12,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:13,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:13,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:13,258 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:13,292 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:13,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:13,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:13,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:13,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 09:26:13,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 09:26:13,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 09:26:13,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:26:13,330 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 37 states. [2018-10-04 09:26:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:13,445 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2018-10-04 09:26:13,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:26:13,446 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2018-10-04 09:26:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:13,447 INFO L225 Difference]: With dead ends: 114 [2018-10-04 09:26:13,447 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 09:26:13,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:26:13,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 09:26:13,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 09:26:13,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 09:26:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-04 09:26:13,452 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-10-04 09:26:13,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:13,452 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-04 09:26:13,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 09:26:13,452 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-04 09:26:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 09:26:13,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:13,453 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1] [2018-10-04 09:26:13,453 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:13,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:13,453 INFO L82 PathProgramCache]: Analyzing trace with hash 945822279, now seen corresponding path program 22 times [2018-10-04 09:26:13,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:13,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:13,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:13,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:13,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:15,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:15,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:15,798 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:15,845 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:15,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:15,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:15,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:15,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 09:26:15,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:26:15,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:26:15,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:26:15,884 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 38 states. [2018-10-04 09:26:15,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:15,974 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-10-04 09:26:15,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:26:15,974 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2018-10-04 09:26:15,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:15,975 INFO L225 Difference]: With dead ends: 116 [2018-10-04 09:26:15,975 INFO L226 Difference]: Without dead ends: 112 [2018-10-04 09:26:15,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:26:15,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-04 09:26:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-04 09:26:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 09:26:15,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-04 09:26:15,979 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-10-04 09:26:15,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:15,979 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-04 09:26:15,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:26:15,979 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-04 09:26:15,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 09:26:15,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:15,980 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1] [2018-10-04 09:26:15,980 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:15,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:15,980 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643925, now seen corresponding path program 35 times [2018-10-04 09:26:15,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:15,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:15,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:15,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:15,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:16,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:16,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:16,812 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:16,874 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 09:26:16,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:16,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:16,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:16,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 09:26:16,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:26:16,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:26:16,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:26:16,923 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 38 states. [2018-10-04 09:26:17,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:17,021 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2018-10-04 09:26:17,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:26:17,022 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2018-10-04 09:26:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:17,023 INFO L225 Difference]: With dead ends: 117 [2018-10-04 09:26:17,023 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 09:26:17,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:26:17,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 09:26:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 09:26:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 09:26:17,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-10-04 09:26:17,027 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-10-04 09:26:17,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:17,028 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-10-04 09:26:17,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:26:17,028 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-10-04 09:26:17,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 09:26:17,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:17,029 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1] [2018-10-04 09:26:17,029 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:17,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:17,029 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643987, now seen corresponding path program 23 times [2018-10-04 09:26:17,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:17,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:17,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:17,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:17,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:17,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:17,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:17,650 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:17,713 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 09:26:17,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:17,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:17,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:17,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 09:26:17,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 09:26:17,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 09:26:17,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:26:17,757 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 39 states. [2018-10-04 09:26:17,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:17,852 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2018-10-04 09:26:17,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:26:17,853 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 110 [2018-10-04 09:26:17,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:17,854 INFO L225 Difference]: With dead ends: 119 [2018-10-04 09:26:17,854 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 09:26:17,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:26:17,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 09:26:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 09:26:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 09:26:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-04 09:26:17,858 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 110 [2018-10-04 09:26:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:17,858 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-04 09:26:17,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 09:26:17,858 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-04 09:26:17,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 09:26:17,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:17,859 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1] [2018-10-04 09:26:17,859 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:17,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:17,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1445413239, now seen corresponding path program 36 times [2018-10-04 09:26:17,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:17,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:17,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:17,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:17,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 37 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:18,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:18,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:18,635 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:18,698 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-04 09:26:18,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:18,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:19,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:19,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-04 09:26:19,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 09:26:19,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 09:26:19,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=4332, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 09:26:19,896 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 77 states. [2018-10-04 09:26:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:22,840 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2018-10-04 09:26:22,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 09:26:22,840 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 113 [2018-10-04 09:26:22,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:22,842 INFO L225 Difference]: With dead ends: 122 [2018-10-04 09:26:22,842 INFO L226 Difference]: Without dead ends: 118 [2018-10-04 09:26:22,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7218, Invalid=15432, Unknown=0, NotChecked=0, Total=22650 [2018-10-04 09:26:22,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-04 09:26:22,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-04 09:26:22,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-04 09:26:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-10-04 09:26:22,848 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 113 [2018-10-04 09:26:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:22,848 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-10-04 09:26:22,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 09:26:22,848 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-10-04 09:26:22,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 09:26:22,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:22,849 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1] [2018-10-04 09:26:22,849 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:22,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:22,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745685, now seen corresponding path program 37 times [2018-10-04 09:26:22,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:22,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:22,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:22,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:22,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:23,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:23,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:23,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:23,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:23,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:23,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 09:26:23,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:26:23,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:26:23,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:26:23,672 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 40 states. [2018-10-04 09:26:24,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:24,655 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2018-10-04 09:26:24,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:26:24,656 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2018-10-04 09:26:24,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:24,657 INFO L225 Difference]: With dead ends: 123 [2018-10-04 09:26:24,657 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 09:26:24,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:26:24,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 09:26:24,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-04 09:26:24,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 09:26:24,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-10-04 09:26:24,662 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-10-04 09:26:24,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:24,662 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-10-04 09:26:24,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:26:24,662 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-10-04 09:26:24,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 09:26:24,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:24,663 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1] [2018-10-04 09:26:24,664 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:24,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:24,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745747, now seen corresponding path program 24 times [2018-10-04 09:26:24,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:24,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:24,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:24,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:24,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:26,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:26,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:26,880 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:26,958 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-10-04 09:26:26,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:26,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:27,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:27,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 09:26:27,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:26:27,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:26:27,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:26:27,017 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 41 states. [2018-10-04 09:26:27,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:27,176 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2018-10-04 09:26:27,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:26:27,176 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 116 [2018-10-04 09:26:27,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:27,177 INFO L225 Difference]: With dead ends: 125 [2018-10-04 09:26:27,177 INFO L226 Difference]: Without dead ends: 121 [2018-10-04 09:26:27,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:26:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-04 09:26:27,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-04 09:26:27,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 09:26:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-10-04 09:26:27,183 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2018-10-04 09:26:27,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:27,183 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-10-04 09:26:27,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:26:27,183 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-10-04 09:26:27,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-04 09:26:27,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:27,184 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1] [2018-10-04 09:26:27,184 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:27,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:27,185 INFO L82 PathProgramCache]: Analyzing trace with hash 308544265, now seen corresponding path program 38 times [2018-10-04 09:26:27,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:27,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:27,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:27,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:27,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:28,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:28,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:28,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:28,905 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:28,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:28,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:28,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:28,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 09:26:28,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:26:28,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:26:28,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:26:28,960 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 41 states. [2018-10-04 09:26:29,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:29,061 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2018-10-04 09:26:29,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:26:29,061 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 119 [2018-10-04 09:26:29,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:29,063 INFO L225 Difference]: With dead ends: 126 [2018-10-04 09:26:29,063 INFO L226 Difference]: Without dead ends: 122 [2018-10-04 09:26:29,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:26:29,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-04 09:26:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-04 09:26:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-04 09:26:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-04 09:26:29,068 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2018-10-04 09:26:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:29,068 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-04 09:26:29,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:26:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-04 09:26:29,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-04 09:26:29,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:29,069 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1] [2018-10-04 09:26:29,069 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:29,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:29,070 INFO L82 PathProgramCache]: Analyzing trace with hash 308544327, now seen corresponding path program 25 times [2018-10-04 09:26:29,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:29,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:29,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:29,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:29,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:29,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:29,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:29,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:29,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:30,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:30,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 09:26:30,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:26:30,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:26:30,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:26:30,008 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 42 states. [2018-10-04 09:26:30,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:30,571 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2018-10-04 09:26:30,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:26:30,572 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 119 [2018-10-04 09:26:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:30,573 INFO L225 Difference]: With dead ends: 128 [2018-10-04 09:26:30,573 INFO L226 Difference]: Without dead ends: 124 [2018-10-04 09:26:30,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:26:30,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-04 09:26:30,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-04 09:26:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-04 09:26:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-10-04 09:26:30,576 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2018-10-04 09:26:30,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:30,576 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-10-04 09:26:30,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:26:30,576 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-10-04 09:26:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 09:26:30,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:30,577 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1] [2018-10-04 09:26:30,577 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:30,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:30,577 INFO L82 PathProgramCache]: Analyzing trace with hash 613624213, now seen corresponding path program 39 times [2018-10-04 09:26:30,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:30,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:30,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:30,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:30,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 40 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:31,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:31,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:31,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:31,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-10-04 09:26:31,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:31,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:32,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:32,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-04 09:26:32,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 09:26:32,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 09:26:32,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1763, Invalid=5043, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 09:26:32,884 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 83 states. [2018-10-04 09:26:36,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:36,037 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2018-10-04 09:26:36,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 09:26:36,037 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 122 [2018-10-04 09:26:36,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:36,038 INFO L225 Difference]: With dead ends: 131 [2018-10-04 09:26:36,039 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 09:26:36,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4759 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8403, Invalid=18003, Unknown=0, NotChecked=0, Total=26406 [2018-10-04 09:26:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 09:26:36,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-04 09:26:36,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-04 09:26:36,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-10-04 09:26:36,044 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2018-10-04 09:26:36,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:36,045 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-10-04 09:26:36,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 09:26:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-10-04 09:26:36,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-04 09:26:36,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:36,045 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1] [2018-10-04 09:26:36,046 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:36,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:36,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556745, now seen corresponding path program 40 times [2018-10-04 09:26:36,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:36,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:36,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:36,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:36,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:37,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:37,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:37,132 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:37,168 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:37,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:37,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:37,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:37,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 09:26:37,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 09:26:37,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 09:26:37,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:26:37,226 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 43 states. [2018-10-04 09:26:37,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:37,412 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2018-10-04 09:26:37,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:26:37,413 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 125 [2018-10-04 09:26:37,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:37,414 INFO L225 Difference]: With dead ends: 132 [2018-10-04 09:26:37,414 INFO L226 Difference]: Without dead ends: 128 [2018-10-04 09:26:37,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:26:37,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-04 09:26:37,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-04 09:26:37,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-04 09:26:37,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2018-10-04 09:26:37,419 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2018-10-04 09:26:37,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:37,419 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2018-10-04 09:26:37,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 09:26:37,419 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2018-10-04 09:26:37,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-04 09:26:37,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:37,420 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1] [2018-10-04 09:26:37,420 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:37,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:37,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556807, now seen corresponding path program 26 times [2018-10-04 09:26:37,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:37,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:37,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:37,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:37,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:38,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:38,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:38,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:38,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:38,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:38,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:38,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:38,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 09:26:38,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:26:38,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:26:38,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:26:38,241 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 44 states. [2018-10-04 09:26:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:38,997 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2018-10-04 09:26:38,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:26:38,997 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 125 [2018-10-04 09:26:38,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:38,998 INFO L225 Difference]: With dead ends: 134 [2018-10-04 09:26:38,998 INFO L226 Difference]: Without dead ends: 130 [2018-10-04 09:26:38,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:26:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-04 09:26:39,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-04 09:26:39,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-04 09:26:39,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-10-04 09:26:39,003 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 125 [2018-10-04 09:26:39,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:39,003 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-10-04 09:26:39,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:26:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-10-04 09:26:39,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 09:26:39,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:39,004 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1] [2018-10-04 09:26:39,005 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:39,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:39,005 INFO L82 PathProgramCache]: Analyzing trace with hash -819137259, now seen corresponding path program 41 times [2018-10-04 09:26:39,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:39,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:39,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:39,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:39,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:40,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:40,796 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:40,804 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:40,879 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 09:26:40,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:40,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:40,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:40,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 09:26:40,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:26:40,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:26:40,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:26:40,942 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 44 states. [2018-10-04 09:26:41,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:41,130 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2018-10-04 09:26:41,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:26:41,130 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2018-10-04 09:26:41,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:41,131 INFO L225 Difference]: With dead ends: 135 [2018-10-04 09:26:41,132 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 09:26:41,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:26:41,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 09:26:41,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-04 09:26:41,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 09:26:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-10-04 09:26:41,136 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-10-04 09:26:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:41,136 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-10-04 09:26:41,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:26:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-10-04 09:26:41,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 09:26:41,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:41,137 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1] [2018-10-04 09:26:41,138 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:41,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:41,138 INFO L82 PathProgramCache]: Analyzing trace with hash -819137197, now seen corresponding path program 27 times [2018-10-04 09:26:41,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:41,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:41,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:41,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:41,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:42,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:42,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:42,224 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:42,303 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2018-10-04 09:26:42,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:42,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:42,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:42,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 09:26:42,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 09:26:42,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 09:26:42,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:26:42,364 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 45 states. [2018-10-04 09:26:42,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:42,485 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2018-10-04 09:26:42,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:26:42,485 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 128 [2018-10-04 09:26:42,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:42,486 INFO L225 Difference]: With dead ends: 137 [2018-10-04 09:26:42,486 INFO L226 Difference]: Without dead ends: 133 [2018-10-04 09:26:42,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:26:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-04 09:26:42,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-04 09:26:42,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 09:26:42,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-04 09:26:42,490 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-10-04 09:26:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:42,490 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-04 09:26:42,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 09:26:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-04 09:26:42,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-04 09:26:42,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:42,491 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1] [2018-10-04 09:26:42,491 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:42,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:42,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1087532041, now seen corresponding path program 42 times [2018-10-04 09:26:42,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:42,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:42,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:42,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:42,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 43 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:43,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:43,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:43,427 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:43,501 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-04 09:26:43,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:43,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:44,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:44,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-04 09:26:44,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 09:26:44,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 09:26:44,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=5808, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 09:26:44,921 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 89 states. [2018-10-04 09:26:48,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:48,793 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2018-10-04 09:26:48,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 09:26:48,794 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 131 [2018-10-04 09:26:48,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:48,795 INFO L225 Difference]: With dead ends: 140 [2018-10-04 09:26:48,795 INFO L226 Difference]: Without dead ends: 136 [2018-10-04 09:26:48,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9678, Invalid=20772, Unknown=0, NotChecked=0, Total=30450 [2018-10-04 09:26:48,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-04 09:26:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-04 09:26:48,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-04 09:26:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-04 09:26:48,800 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 131 [2018-10-04 09:26:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:48,800 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-04 09:26:48,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 09:26:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-04 09:26:48,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 09:26:48,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:48,801 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1] [2018-10-04 09:26:48,801 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:48,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:48,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158741, now seen corresponding path program 43 times [2018-10-04 09:26:48,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:48,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:48,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:48,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:48,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:49,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:49,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:49,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:49,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:49,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:49,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 09:26:49,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:26:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:26:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:26:49,718 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 46 states. [2018-10-04 09:26:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:49,862 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2018-10-04 09:26:49,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:26:49,862 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2018-10-04 09:26:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:49,863 INFO L225 Difference]: With dead ends: 141 [2018-10-04 09:26:49,864 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 09:26:49,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:26:49,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 09:26:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-04 09:26:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-04 09:26:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-10-04 09:26:49,868 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-10-04 09:26:49,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:49,868 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-10-04 09:26:49,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:26:49,868 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-10-04 09:26:49,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 09:26:49,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:49,869 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1] [2018-10-04 09:26:49,869 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:49,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:49,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158803, now seen corresponding path program 28 times [2018-10-04 09:26:49,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:49,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:49,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:49,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:49,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:50,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:50,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:50,684 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:50,726 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:50,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:50,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:50,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:50,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 09:26:50,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:26:50,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:26:50,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:26:50,769 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 47 states. [2018-10-04 09:26:50,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:50,835 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2018-10-04 09:26:50,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:26:50,835 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 134 [2018-10-04 09:26:50,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:50,837 INFO L225 Difference]: With dead ends: 143 [2018-10-04 09:26:50,837 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 09:26:50,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:26:50,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 09:26:50,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-04 09:26:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 09:26:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-10-04 09:26:50,841 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 134 [2018-10-04 09:26:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:50,842 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-10-04 09:26:50,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:26:50,842 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-10-04 09:26:50,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-04 09:26:50,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:50,842 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1] [2018-10-04 09:26:50,842 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:50,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:50,843 INFO L82 PathProgramCache]: Analyzing trace with hash -742027127, now seen corresponding path program 44 times [2018-10-04 09:26:50,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:50,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:50,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:50,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:50,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:51,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:51,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:51,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:51,659 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:51,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:51,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:51,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:51,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 09:26:51,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:26:51,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:26:51,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:26:51,749 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 47 states. [2018-10-04 09:26:52,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:52,094 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2018-10-04 09:26:52,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:26:52,094 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 137 [2018-10-04 09:26:52,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:52,096 INFO L225 Difference]: With dead ends: 144 [2018-10-04 09:26:52,096 INFO L226 Difference]: Without dead ends: 140 [2018-10-04 09:26:52,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:26:52,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-04 09:26:52,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-04 09:26:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-04 09:26:52,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-10-04 09:26:52,100 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2018-10-04 09:26:52,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:52,100 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-10-04 09:26:52,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:26:52,100 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-10-04 09:26:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-04 09:26:52,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:52,101 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1] [2018-10-04 09:26:52,102 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:52,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:52,102 INFO L82 PathProgramCache]: Analyzing trace with hash -742027065, now seen corresponding path program 29 times [2018-10-04 09:26:52,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:52,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:52,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:52,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:52,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:52,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:52,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:52,894 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:52,974 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 09:26:52,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:52,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:53,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:53,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 09:26:53,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:26:53,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:26:53,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:26:53,021 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 48 states. [2018-10-04 09:26:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:53,138 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2018-10-04 09:26:53,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:26:53,139 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 137 [2018-10-04 09:26:53,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:53,140 INFO L225 Difference]: With dead ends: 146 [2018-10-04 09:26:53,140 INFO L226 Difference]: Without dead ends: 142 [2018-10-04 09:26:53,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:26:53,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-04 09:26:53,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-04 09:26:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-04 09:26:53,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2018-10-04 09:26:53,145 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 137 [2018-10-04 09:26:53,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:53,145 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2018-10-04 09:26:53,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:26:53,145 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2018-10-04 09:26:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 09:26:53,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:53,146 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1] [2018-10-04 09:26:53,146 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:53,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:53,147 INFO L82 PathProgramCache]: Analyzing trace with hash 467971093, now seen corresponding path program 45 times [2018-10-04 09:26:53,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:53,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:53,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:53,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:53,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:54,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:54,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:54,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:54,105 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-10-04 09:26:54,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:54,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:54,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:54,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 09:26:54,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:26:54,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:26:54,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:26:54,156 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 48 states. [2018-10-04 09:26:54,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:54,219 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2018-10-04 09:26:54,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:26:54,220 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2018-10-04 09:26:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:54,221 INFO L225 Difference]: With dead ends: 147 [2018-10-04 09:26:54,221 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 09:26:54,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:26:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 09:26:54,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-04 09:26:54,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 09:26:54,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-10-04 09:26:54,225 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-10-04 09:26:54,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:54,226 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-10-04 09:26:54,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:26:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-10-04 09:26:54,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 09:26:54,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:54,227 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1] [2018-10-04 09:26:54,227 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:54,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:54,227 INFO L82 PathProgramCache]: Analyzing trace with hash 467971155, now seen corresponding path program 30 times [2018-10-04 09:26:54,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:54,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:54,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:54,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:54,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:55,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:55,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:55,250 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:55,334 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-10-04 09:26:55,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:55,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:55,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:55,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 09:26:55,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 09:26:55,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 09:26:55,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:26:55,400 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 49 states. [2018-10-04 09:26:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:56,203 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-10-04 09:26:56,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:26:56,204 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 140 [2018-10-04 09:26:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:56,205 INFO L225 Difference]: With dead ends: 149 [2018-10-04 09:26:56,205 INFO L226 Difference]: Without dead ends: 145 [2018-10-04 09:26:56,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:26:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-04 09:26:56,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-04 09:26:56,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 09:26:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-10-04 09:26:56,211 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2018-10-04 09:26:56,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:56,211 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-10-04 09:26:56,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 09:26:56,212 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-10-04 09:26:56,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-04 09:26:56,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:56,212 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1] [2018-10-04 09:26:56,213 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:56,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:56,213 INFO L82 PathProgramCache]: Analyzing trace with hash -135572215, now seen corresponding path program 46 times [2018-10-04 09:26:56,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:56,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:56,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:56,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:56,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 47 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:57,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:57,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:57,461 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:57,506 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:57,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:57,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:59,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:59,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-04 09:26:59,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 09:26:59,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 09:26:59,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2400, Invalid=6912, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 09:26:59,296 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 97 states. [2018-10-04 09:27:03,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:03,887 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2018-10-04 09:27:03,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 09:27:03,887 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 143 [2018-10-04 09:27:03,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:03,889 INFO L225 Difference]: With dead ends: 152 [2018-10-04 09:27:03,889 INFO L226 Difference]: Without dead ends: 148 [2018-10-04 09:27:03,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6579 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=11518, Invalid=24772, Unknown=0, NotChecked=0, Total=36290 [2018-10-04 09:27:03,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-04 09:27:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-04 09:27:03,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-04 09:27:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2018-10-04 09:27:03,895 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2018-10-04 09:27:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:03,895 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2018-10-04 09:27:03,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 09:27:03,895 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2018-10-04 09:27:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 09:27:03,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:03,896 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1] [2018-10-04 09:27:03,897 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:03,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:03,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159787, now seen corresponding path program 47 times [2018-10-04 09:27:03,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:03,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:03,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:03,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:03,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:04,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:04,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:04,857 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:04,948 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 09:27:04,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:04,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:05,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:05,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 09:27:05,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:27:05,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:27:05,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:27:05,017 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 50 states. [2018-10-04 09:27:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:05,160 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2018-10-04 09:27:05,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:27:05,160 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2018-10-04 09:27:05,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:05,161 INFO L225 Difference]: With dead ends: 153 [2018-10-04 09:27:05,162 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 09:27:05,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:27:05,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 09:27:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-04 09:27:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 09:27:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-10-04 09:27:05,166 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-10-04 09:27:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:05,166 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-10-04 09:27:05,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:27:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-10-04 09:27:05,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 09:27:05,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:05,167 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1] [2018-10-04 09:27:05,167 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:05,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:05,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159725, now seen corresponding path program 31 times [2018-10-04 09:27:05,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:05,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:05,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:05,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:05,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:06,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:06,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:06,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:06,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:06,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:06,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 09:27:06,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 09:27:06,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 09:27:06,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:27:06,148 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 51 states. [2018-10-04 09:27:06,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:06,283 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-10-04 09:27:06,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:27:06,283 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 146 [2018-10-04 09:27:06,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:06,284 INFO L225 Difference]: With dead ends: 155 [2018-10-04 09:27:06,284 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 09:27:06,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:27:06,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 09:27:06,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-04 09:27:06,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 09:27:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-10-04 09:27:06,290 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2018-10-04 09:27:06,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:06,290 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-10-04 09:27:06,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 09:27:06,290 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-10-04 09:27:06,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-04 09:27:06,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:06,291 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1] [2018-10-04 09:27:06,291 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:06,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:06,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1691072905, now seen corresponding path program 48 times [2018-10-04 09:27:06,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:06,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:06,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:06,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:06,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 49 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:07,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:07,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:07,525 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:07,615 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-10-04 09:27:07,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:07,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 3577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:09,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:09,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-04 09:27:09,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-04 09:27:09,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-04 09:27:09,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2600, Invalid=7500, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 09:27:09,393 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 101 states. [2018-10-04 09:27:14,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:14,163 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2018-10-04 09:27:14,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 09:27:14,164 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 149 [2018-10-04 09:27:14,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:14,165 INFO L225 Difference]: With dead ends: 158 [2018-10-04 09:27:14,165 INFO L226 Difference]: Without dead ends: 154 [2018-10-04 09:27:14,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7153 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=12498, Invalid=26904, Unknown=0, NotChecked=0, Total=39402 [2018-10-04 09:27:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-04 09:27:14,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-04 09:27:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-04 09:27:14,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2018-10-04 09:27:14,169 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 149 [2018-10-04 09:27:14,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:14,169 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2018-10-04 09:27:14,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-04 09:27:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2018-10-04 09:27:14,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 09:27:14,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:14,170 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1] [2018-10-04 09:27:14,170 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:14,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:14,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030187, now seen corresponding path program 49 times [2018-10-04 09:27:14,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:14,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:14,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:14,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:14,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:15,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:15,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:15,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:15,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:15,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:15,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 09:27:15,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:27:15,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:27:15,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:27:15,215 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 52 states. [2018-10-04 09:27:15,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:15,486 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2018-10-04 09:27:15,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:27:15,486 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 152 [2018-10-04 09:27:15,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:15,487 INFO L225 Difference]: With dead ends: 159 [2018-10-04 09:27:15,487 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 09:27:15,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:27:15,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 09:27:15,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-04 09:27:15,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 09:27:15,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-10-04 09:27:15,493 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-10-04 09:27:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:15,493 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-10-04 09:27:15,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:27:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-10-04 09:27:15,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 09:27:15,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:15,494 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1] [2018-10-04 09:27:15,494 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:15,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:15,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030125, now seen corresponding path program 32 times [2018-10-04 09:27:15,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:15,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:15,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:15,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:15,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:16,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:16,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:16,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:16,545 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:16,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:16,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:16,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:16,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 09:27:16,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:27:16,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:27:16,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:27:16,601 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 53 states. [2018-10-04 09:27:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:16,695 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2018-10-04 09:27:16,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:27:16,696 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 152 [2018-10-04 09:27:16,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:16,697 INFO L225 Difference]: With dead ends: 161 [2018-10-04 09:27:16,697 INFO L226 Difference]: Without dead ends: 157 [2018-10-04 09:27:16,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:27:16,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-04 09:27:16,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-04 09:27:16,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 09:27:16,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-10-04 09:27:16,702 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 152 [2018-10-04 09:27:16,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:16,702 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-10-04 09:27:16,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:27:16,703 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-10-04 09:27:16,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-04 09:27:16,704 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:16,704 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1] [2018-10-04 09:27:16,704 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:16,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:16,704 INFO L82 PathProgramCache]: Analyzing trace with hash 200195593, now seen corresponding path program 50 times [2018-10-04 09:27:16,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:16,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:16,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:16,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:16,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:17,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:17,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:17,954 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:18,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:18,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:18,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:18,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:18,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 09:27:18,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:27:18,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:27:18,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:27:18,064 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 53 states. [2018-10-04 09:27:18,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:18,206 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2018-10-04 09:27:18,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:27:18,206 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 155 [2018-10-04 09:27:18,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:18,207 INFO L225 Difference]: With dead ends: 162 [2018-10-04 09:27:18,207 INFO L226 Difference]: Without dead ends: 158 [2018-10-04 09:27:18,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:27:18,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-04 09:27:18,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-04 09:27:18,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-04 09:27:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2018-10-04 09:27:18,210 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 155 [2018-10-04 09:27:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:18,210 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2018-10-04 09:27:18,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:27:18,211 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2018-10-04 09:27:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-04 09:27:18,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:18,211 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1] [2018-10-04 09:27:18,211 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:18,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:18,212 INFO L82 PathProgramCache]: Analyzing trace with hash 200195655, now seen corresponding path program 33 times [2018-10-04 09:27:18,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:18,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:18,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:18,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:18,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:19,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:19,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:19,233 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:19,324 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-04 09:27:19,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:19,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:19,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:19,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 09:27:19,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:27:19,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:27:19,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:27:19,387 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 54 states. [2018-10-04 09:27:19,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:19,517 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2018-10-04 09:27:19,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:27:19,518 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 155 [2018-10-04 09:27:19,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:19,519 INFO L225 Difference]: With dead ends: 164 [2018-10-04 09:27:19,519 INFO L226 Difference]: Without dead ends: 160 [2018-10-04 09:27:19,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:27:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-04 09:27:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-04 09:27:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-04 09:27:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-10-04 09:27:19,524 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2018-10-04 09:27:19,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:19,524 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-10-04 09:27:19,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:27:19,524 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-10-04 09:27:19,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 09:27:19,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:19,525 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1] [2018-10-04 09:27:19,525 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:19,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:19,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1681224043, now seen corresponding path program 51 times [2018-10-04 09:27:19,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:19,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:19,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:19,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:19,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 52 proven. 3978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:20,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:20,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:20,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:20,681 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-10-04 09:27:20,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:20,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:23,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:23,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-04 09:27:23,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-04 09:27:23,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-04 09:27:23,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2915, Invalid=8427, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 09:27:23,015 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 107 states. [2018-10-04 09:27:28,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:28,285 INFO L93 Difference]: Finished difference Result 167 states and 174 transitions. [2018-10-04 09:27:28,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 09:27:28,285 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 158 [2018-10-04 09:27:28,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:28,287 INFO L225 Difference]: With dead ends: 167 [2018-10-04 09:27:28,287 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 09:27:28,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8059 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=14043, Invalid=30267, Unknown=0, NotChecked=0, Total=44310 [2018-10-04 09:27:28,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 09:27:28,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-04 09:27:28,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-04 09:27:28,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-10-04 09:27:28,293 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 158 [2018-10-04 09:27:28,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:28,293 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-10-04 09:27:28,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-04 09:27:28,293 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-10-04 09:27:28,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-04 09:27:28,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:28,294 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1] [2018-10-04 09:27:28,295 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:28,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:28,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387319, now seen corresponding path program 52 times [2018-10-04 09:27:28,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:28,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:28,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:28,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:28,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:29,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:29,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:29,372 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:29,424 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:29,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:29,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:29,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:29,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 09:27:29,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 09:27:29,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 09:27:29,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:27:29,473 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 55 states. [2018-10-04 09:27:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:29,613 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2018-10-04 09:27:29,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:27:29,614 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 161 [2018-10-04 09:27:29,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:29,615 INFO L225 Difference]: With dead ends: 168 [2018-10-04 09:27:29,615 INFO L226 Difference]: Without dead ends: 164 [2018-10-04 09:27:29,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:27:29,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-04 09:27:29,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-04 09:27:29,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-04 09:27:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-10-04 09:27:29,619 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 161 [2018-10-04 09:27:29,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:29,620 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-10-04 09:27:29,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 09:27:29,620 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-10-04 09:27:29,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-04 09:27:29,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:29,620 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1] [2018-10-04 09:27:29,621 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:29,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:29,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387257, now seen corresponding path program 34 times [2018-10-04 09:27:29,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:29,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:29,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:29,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:29,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:30,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:30,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:30,723 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:30,770 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:30,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:30,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:30,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:30,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 09:27:30,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:27:30,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:27:30,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:27:30,839 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 56 states. [2018-10-04 09:27:31,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:31,151 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2018-10-04 09:27:31,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:27:31,151 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 161 [2018-10-04 09:27:31,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:31,152 INFO L225 Difference]: With dead ends: 170 [2018-10-04 09:27:31,152 INFO L226 Difference]: Without dead ends: 166 [2018-10-04 09:27:31,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:27:31,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-04 09:27:31,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-04 09:27:31,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-04 09:27:31,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-10-04 09:27:31,158 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 161 [2018-10-04 09:27:31,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:31,158 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-10-04 09:27:31,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:27:31,158 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-10-04 09:27:31,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 09:27:31,159 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:31,159 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1] [2018-10-04 09:27:31,159 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:31,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:31,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694699, now seen corresponding path program 53 times [2018-10-04 09:27:31,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:31,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:31,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:31,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:31,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:32,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:32,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:32,248 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:32,350 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-04 09:27:32,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:32,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:32,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:32,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 09:27:32,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:27:32,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:27:32,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:27:32,408 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 56 states. [2018-10-04 09:27:32,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:32,496 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2018-10-04 09:27:32,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:27:32,496 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 164 [2018-10-04 09:27:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:32,497 INFO L225 Difference]: With dead ends: 171 [2018-10-04 09:27:32,497 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 09:27:32,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:27:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 09:27:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-04 09:27:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 09:27:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-10-04 09:27:32,502 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-10-04 09:27:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:32,502 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-10-04 09:27:32,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:27:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-10-04 09:27:32,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 09:27:32,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:32,504 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1] [2018-10-04 09:27:32,504 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:32,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:32,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694637, now seen corresponding path program 35 times [2018-10-04 09:27:32,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:32,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:32,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:32,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:32,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:33,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:33,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:33,997 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:34,098 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-04 09:27:34,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:34,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:34,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:34,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 09:27:34,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 09:27:34,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 09:27:34,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 09:27:34,150 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 57 states. [2018-10-04 09:27:34,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:34,301 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-10-04 09:27:34,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:27:34,302 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 164 [2018-10-04 09:27:34,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:34,303 INFO L225 Difference]: With dead ends: 173 [2018-10-04 09:27:34,303 INFO L226 Difference]: Without dead ends: 169 [2018-10-04 09:27:34,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 09:27:34,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-04 09:27:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-04 09:27:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-04 09:27:34,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-10-04 09:27:34,308 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 164 [2018-10-04 09:27:34,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:34,308 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-10-04 09:27:34,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 09:27:34,308 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-10-04 09:27:34,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-04 09:27:34,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:34,309 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1] [2018-10-04 09:27:34,309 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:34,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash -249780471, now seen corresponding path program 54 times [2018-10-04 09:27:34,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:34,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:34,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:34,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:34,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 55 proven. 4455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:35,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:35,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:35,446 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:35,545 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-10-04 09:27:35,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:35,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 4510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:37,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:37,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-04 09:27:37,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-04 09:27:37,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-04 09:27:37,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3248, Invalid=9408, Unknown=0, NotChecked=0, Total=12656 [2018-10-04 09:27:37,865 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 113 states. [2018-10-04 09:27:44,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:44,021 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2018-10-04 09:27:44,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-04 09:27:44,022 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 167 [2018-10-04 09:27:44,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:44,023 INFO L225 Difference]: With dead ends: 176 [2018-10-04 09:27:44,023 INFO L226 Difference]: Without dead ends: 172 [2018-10-04 09:27:44,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9019 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=15678, Invalid=33828, Unknown=0, NotChecked=0, Total=49506 [2018-10-04 09:27:44,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-10-04 09:27:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-10-04 09:27:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-04 09:27:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2018-10-04 09:27:44,029 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2018-10-04 09:27:44,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:44,030 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2018-10-04 09:27:44,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-04 09:27:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2018-10-04 09:27:44,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 09:27:44,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:44,031 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1] [2018-10-04 09:27:44,033 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:44,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:44,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751445, now seen corresponding path program 55 times [2018-10-04 09:27:44,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:44,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:44,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:44,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:44,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:45,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:45,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:45,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:45,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:45,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:45,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 09:27:45,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:27:45,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:27:45,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:27:45,844 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand 58 states. [2018-10-04 09:27:45,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:45,993 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2018-10-04 09:27:45,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:27:45,994 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 170 [2018-10-04 09:27:45,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:45,995 INFO L225 Difference]: With dead ends: 177 [2018-10-04 09:27:45,995 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 09:27:45,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:27:45,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 09:27:45,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-04 09:27:46,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-04 09:27:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-10-04 09:27:46,000 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-10-04 09:27:46,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:46,000 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-10-04 09:27:46,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:27:46,000 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-10-04 09:27:46,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 09:27:46,001 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:46,001 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1] [2018-10-04 09:27:46,001 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:46,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:46,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751507, now seen corresponding path program 36 times [2018-10-04 09:27:46,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:46,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:46,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:46,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:46,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:47,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:47,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:47,206 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:47,315 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2018-10-04 09:27:47,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:47,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:47,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:47,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 09:27:47,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 09:27:47,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 09:27:47,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:27:47,372 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 59 states. [2018-10-04 09:27:47,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:47,527 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2018-10-04 09:27:47,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:27:47,528 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 170 [2018-10-04 09:27:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:47,528 INFO L225 Difference]: With dead ends: 179 [2018-10-04 09:27:47,529 INFO L226 Difference]: Without dead ends: 175 [2018-10-04 09:27:47,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:27:47,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-04 09:27:47,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-04 09:27:47,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 09:27:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-04 09:27:47,532 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-10-04 09:27:47,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:47,532 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-04 09:27:47,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 09:27:47,532 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-04 09:27:47,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-04 09:27:47,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:47,533 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1] [2018-10-04 09:27:47,533 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:47,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:47,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428215, now seen corresponding path program 56 times [2018-10-04 09:27:47,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:47,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:47,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:47,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:47,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:49,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:49,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:49,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:49,175 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:49,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:49,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:49,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:49,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 09:27:49,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 09:27:49,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 09:27:49,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:27:49,226 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 59 states. [2018-10-04 09:27:49,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:49,387 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2018-10-04 09:27:49,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:27:49,387 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 173 [2018-10-04 09:27:49,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:49,389 INFO L225 Difference]: With dead ends: 180 [2018-10-04 09:27:49,389 INFO L226 Difference]: Without dead ends: 176 [2018-10-04 09:27:49,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:27:49,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-04 09:27:49,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-10-04 09:27:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-04 09:27:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-10-04 09:27:49,393 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 173 [2018-10-04 09:27:49,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:49,393 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-10-04 09:27:49,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 09:27:49,394 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-10-04 09:27:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-04 09:27:49,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:49,395 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1] [2018-10-04 09:27:49,395 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:49,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:49,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428153, now seen corresponding path program 37 times [2018-10-04 09:27:49,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:49,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:49,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:49,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:49,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:50,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:50,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:50,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:50,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:50,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:50,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 09:27:50,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 09:27:50,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 09:27:50,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:27:50,748 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 60 states. [2018-10-04 09:27:50,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:50,857 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2018-10-04 09:27:50,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 09:27:50,858 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 173 [2018-10-04 09:27:50,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:50,859 INFO L225 Difference]: With dead ends: 182 [2018-10-04 09:27:50,859 INFO L226 Difference]: Without dead ends: 178 [2018-10-04 09:27:50,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:27:50,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-10-04 09:27:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-10-04 09:27:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-04 09:27:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-10-04 09:27:50,865 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 173 [2018-10-04 09:27:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:50,865 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-10-04 09:27:50,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 09:27:50,865 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-10-04 09:27:50,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-04 09:27:50,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:50,866 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1] [2018-10-04 09:27:50,867 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:50,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:50,867 INFO L82 PathProgramCache]: Analyzing trace with hash 200069397, now seen corresponding path program 57 times [2018-10-04 09:27:50,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:50,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:50,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:50,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:50,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 58 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:52,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:52,416 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:52,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:52,530 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-10-04 09:27:52,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:52,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:55,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:55,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-04 09:27:55,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-10-04 09:27:55,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-10-04 09:27:55,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3599, Invalid=10443, Unknown=0, NotChecked=0, Total=14042 [2018-10-04 09:27:55,296 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 119 states. [2018-10-04 09:28:01,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:01,655 INFO L93 Difference]: Finished difference Result 185 states and 192 transitions. [2018-10-04 09:28:01,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-10-04 09:28:01,656 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 176 [2018-10-04 09:28:01,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:01,657 INFO L225 Difference]: With dead ends: 185 [2018-10-04 09:28:01,657 INFO L226 Difference]: Without dead ends: 181 [2018-10-04 09:28:01,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10033 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=17403, Invalid=37587, Unknown=0, NotChecked=0, Total=54990 [2018-10-04 09:28:01,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-04 09:28:01,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-04 09:28:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-04 09:28:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-10-04 09:28:01,664 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 176 [2018-10-04 09:28:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:01,665 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-10-04 09:28:01,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-10-04 09:28:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-10-04 09:28:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-04 09:28:01,666 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:01,666 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1] [2018-10-04 09:28:01,666 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:01,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:01,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761783, now seen corresponding path program 58 times [2018-10-04 09:28:01,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:01,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:01,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:01,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:01,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:03,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:03,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:03,079 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:03,132 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:03,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:03,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:03,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:03,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 09:28:03,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 09:28:03,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 09:28:03,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 09:28:03,183 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 61 states. [2018-10-04 09:28:03,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:03,299 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2018-10-04 09:28:03,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 09:28:03,300 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 179 [2018-10-04 09:28:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:03,301 INFO L225 Difference]: With dead ends: 186 [2018-10-04 09:28:03,301 INFO L226 Difference]: Without dead ends: 182 [2018-10-04 09:28:03,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 09:28:03,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-04 09:28:03,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-10-04 09:28:03,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-04 09:28:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-10-04 09:28:03,305 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 179 [2018-10-04 09:28:03,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:03,306 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-10-04 09:28:03,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 09:28:03,306 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-10-04 09:28:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-04 09:28:03,306 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:03,306 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1] [2018-10-04 09:28:03,307 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:03,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:03,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761721, now seen corresponding path program 38 times [2018-10-04 09:28:03,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:03,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:03,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:03,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:03,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:04,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:04,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:04,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:04,989 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:04,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:04,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:05,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:05,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 09:28:05,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 09:28:05,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 09:28:05,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:28:05,051 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 62 states. [2018-10-04 09:28:05,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:05,229 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2018-10-04 09:28:05,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 09:28:05,230 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 179 [2018-10-04 09:28:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:05,231 INFO L225 Difference]: With dead ends: 188 [2018-10-04 09:28:05,231 INFO L226 Difference]: Without dead ends: 184 [2018-10-04 09:28:05,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:28:05,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-10-04 09:28:05,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-10-04 09:28:05,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-04 09:28:05,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2018-10-04 09:28:05,234 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 179 [2018-10-04 09:28:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:05,234 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2018-10-04 09:28:05,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 09:28:05,234 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2018-10-04 09:28:05,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 09:28:05,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:05,235 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1] [2018-10-04 09:28:05,235 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:05,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:05,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1282737003, now seen corresponding path program 59 times [2018-10-04 09:28:05,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:05,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:05,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:05,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:05,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:06,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:06,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:06,618 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:06,734 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-10-04 09:28:06,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:06,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:06,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:06,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 09:28:06,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 09:28:06,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 09:28:06,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:28:06,791 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 62 states. [2018-10-04 09:28:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:06,913 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2018-10-04 09:28:06,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 09:28:06,913 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 182 [2018-10-04 09:28:06,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:06,914 INFO L225 Difference]: With dead ends: 189 [2018-10-04 09:28:06,914 INFO L226 Difference]: Without dead ends: 185 [2018-10-04 09:28:06,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:28:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-04 09:28:06,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-04 09:28:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 09:28:06,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-04 09:28:06,919 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-10-04 09:28:06,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:06,919 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-04 09:28:06,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 09:28:06,919 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-04 09:28:06,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 09:28:06,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:06,920 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1] [2018-10-04 09:28:06,920 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:06,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:06,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1282736941, now seen corresponding path program 39 times [2018-10-04 09:28:06,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:06,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:06,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:06,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:06,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:08,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:08,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:08,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:08,466 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2018-10-04 09:28:08,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:08,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:08,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:08,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 09:28:08,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 09:28:08,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 09:28:08,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 09:28:08,524 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 63 states. [2018-10-04 09:28:08,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:08,792 INFO L93 Difference]: Finished difference Result 191 states and 197 transitions. [2018-10-04 09:28:08,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 09:28:08,792 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 182 [2018-10-04 09:28:08,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:08,793 INFO L225 Difference]: With dead ends: 191 [2018-10-04 09:28:08,793 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 09:28:08,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 09:28:08,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 09:28:08,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-04 09:28:08,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-04 09:28:08,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-10-04 09:28:08,799 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2018-10-04 09:28:08,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:08,799 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-10-04 09:28:08,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 09:28:08,799 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-10-04 09:28:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-04 09:28:08,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:08,800 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1] [2018-10-04 09:28:08,801 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:08,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:08,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1692584823, now seen corresponding path program 60 times [2018-10-04 09:28:08,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:08,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:08,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:08,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:08,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 61 proven. 5490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:10,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:10,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:10,251 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:10,366 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-10-04 09:28:10,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:10,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 5551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:13,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:13,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-04 09:28:13,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-10-04 09:28:13,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-10-04 09:28:13,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3968, Invalid=11532, Unknown=0, NotChecked=0, Total=15500 [2018-10-04 09:28:13,133 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 125 states. [2018-10-04 09:28:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:20,410 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2018-10-04 09:28:20,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-10-04 09:28:20,410 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 185 [2018-10-04 09:28:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:20,411 INFO L225 Difference]: With dead ends: 194 [2018-10-04 09:28:20,411 INFO L226 Difference]: Without dead ends: 190 [2018-10-04 09:28:20,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11101 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=19218, Invalid=41544, Unknown=0, NotChecked=0, Total=60762 [2018-10-04 09:28:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-04 09:28:20,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-10-04 09:28:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-04 09:28:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-10-04 09:28:20,418 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 185 [2018-10-04 09:28:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:20,418 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-10-04 09:28:20,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-10-04 09:28:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-10-04 09:28:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 09:28:20,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:20,419 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1] [2018-10-04 09:28:20,419 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:20,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:20,420 INFO L82 PathProgramCache]: Analyzing trace with hash -876967915, now seen corresponding path program 61 times [2018-10-04 09:28:20,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:20,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:20,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:20,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:20,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:21,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:21,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:28:21,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:21,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:21,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:21,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 09:28:21,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 09:28:21,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 09:28:21,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:28:21,951 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 64 states. [2018-10-04 09:28:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:22,152 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2018-10-04 09:28:22,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 09:28:22,153 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 188 [2018-10-04 09:28:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:22,154 INFO L225 Difference]: With dead ends: 195 [2018-10-04 09:28:22,155 INFO L226 Difference]: Without dead ends: 191 [2018-10-04 09:28:22,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:28:22,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-04 09:28:22,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-04 09:28:22,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-04 09:28:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-10-04 09:28:22,160 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-10-04 09:28:22,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:22,160 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-10-04 09:28:22,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 09:28:22,160 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-10-04 09:28:22,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 09:28:22,161 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:22,162 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1] [2018-10-04 09:28:22,162 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:22,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:22,162 INFO L82 PathProgramCache]: Analyzing trace with hash -876967853, now seen corresponding path program 40 times [2018-10-04 09:28:22,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:22,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:22,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:22,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:22,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:23,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:23,656 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 [2018-10-04 09:28:23,663 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:23,718 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:23,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:23,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:23,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:23,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 09:28:23,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 09:28:23,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 09:28:23,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:28:23,777 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 65 states. [2018-10-04 09:28:24,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:24,012 INFO L93 Difference]: Finished difference Result 197 states and 203 transitions. [2018-10-04 09:28:24,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 09:28:24,012 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 188 [2018-10-04 09:28:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:24,013 INFO L225 Difference]: With dead ends: 197 [2018-10-04 09:28:24,013 INFO L226 Difference]: Without dead ends: 193 [2018-10-04 09:28:24,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:28:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-04 09:28:24,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-04 09:28:24,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-04 09:28:24,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-10-04 09:28:24,018 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 188 [2018-10-04 09:28:24,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:24,018 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-10-04 09:28:24,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 09:28:24,018 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-10-04 09:28:24,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-04 09:28:24,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:24,019 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1] [2018-10-04 09:28:24,019 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:24,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:24,020 INFO L82 PathProgramCache]: Analyzing trace with hash 536344841, now seen corresponding path program 62 times [2018-10-04 09:28:24,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:24,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:24,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:24,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:24,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:25,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:25,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:28:25,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:25,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:25,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:25,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:25,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:25,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 09:28:25,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 09:28:25,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 09:28:25,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:28:25,723 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 65 states. [2018-10-04 09:28:25,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:25,884 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2018-10-04 09:28:25,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 09:28:25,884 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 191 [2018-10-04 09:28:25,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:25,885 INFO L225 Difference]: With dead ends: 198 [2018-10-04 09:28:25,885 INFO L226 Difference]: Without dead ends: 194 [2018-10-04 09:28:25,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:28:25,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-04 09:28:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-10-04 09:28:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-04 09:28:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2018-10-04 09:28:25,888 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 191 [2018-10-04 09:28:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:25,889 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2018-10-04 09:28:25,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 09:28:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2018-10-04 09:28:25,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-04 09:28:25,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:25,890 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1] [2018-10-04 09:28:25,890 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:25,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:25,890 INFO L82 PathProgramCache]: Analyzing trace with hash 536344903, now seen corresponding path program 41 times [2018-10-04 09:28:25,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:25,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:25,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:25,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:25,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:27,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:27,513 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 [2018-10-04 09:28:27,520 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:27,645 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-10-04 09:28:27,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:27,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:27,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:27,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 09:28:27,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 09:28:27,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 09:28:27,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:28:27,724 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 66 states. [2018-10-04 09:28:27,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:27,908 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2018-10-04 09:28:27,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 09:28:27,908 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 191 [2018-10-04 09:28:27,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:27,909 INFO L225 Difference]: With dead ends: 200 [2018-10-04 09:28:27,909 INFO L226 Difference]: Without dead ends: 196 [2018-10-04 09:28:27,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:28:27,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-04 09:28:27,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-10-04 09:28:27,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-04 09:28:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-10-04 09:28:27,914 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 191 [2018-10-04 09:28:27,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:27,914 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-10-04 09:28:27,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 09:28:27,914 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-10-04 09:28:27,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-04 09:28:27,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:27,915 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1] [2018-10-04 09:28:27,915 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:27,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:27,916 INFO L82 PathProgramCache]: Analyzing trace with hash 972256149, now seen corresponding path program 63 times [2018-10-04 09:28:27,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:27,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:27,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:27,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:27,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 64 proven. 6048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:29,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:29,690 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 [2018-10-04 09:28:29,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:29,822 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-10-04 09:28:29,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:29,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:32,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:32,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-10-04 09:28:32,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-10-04 09:28:32,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-10-04 09:28:32,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4355, Invalid=12675, Unknown=0, NotChecked=0, Total=17030 [2018-10-04 09:28:32,846 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 131 states. [2018-10-04 09:28:40,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:40,853 INFO L93 Difference]: Finished difference Result 203 states and 210 transitions. [2018-10-04 09:28:40,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-10-04 09:28:40,854 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 194 [2018-10-04 09:28:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:40,854 INFO L225 Difference]: With dead ends: 203 [2018-10-04 09:28:40,855 INFO L226 Difference]: Without dead ends: 199 [2018-10-04 09:28:40,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12223 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=21123, Invalid=45699, Unknown=0, NotChecked=0, Total=66822 [2018-10-04 09:28:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-04 09:28:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-04 09:28:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-04 09:28:40,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-10-04 09:28:40,861 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2018-10-04 09:28:40,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:40,861 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-10-04 09:28:40,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-10-04 09:28:40,861 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-10-04 09:28:40,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-04 09:28:40,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:40,862 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1] [2018-10-04 09:28:40,862 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:40,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:40,862 INFO L82 PathProgramCache]: Analyzing trace with hash -775070327, now seen corresponding path program 64 times [2018-10-04 09:28:40,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:40,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:40,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:40,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:40,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:42,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:42,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:28:42,415 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:42,473 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:42,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:42,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:42,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:42,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 09:28:42,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 09:28:42,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 09:28:42,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 09:28:42,531 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 67 states. [2018-10-04 09:28:42,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:42,644 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2018-10-04 09:28:42,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 09:28:42,645 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 197 [2018-10-04 09:28:42,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:42,646 INFO L225 Difference]: With dead ends: 204 [2018-10-04 09:28:42,646 INFO L226 Difference]: Without dead ends: 200 [2018-10-04 09:28:42,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 09:28:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-10-04 09:28:42,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-10-04 09:28:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-04 09:28:42,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-10-04 09:28:42,651 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 197 [2018-10-04 09:28:42,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:42,652 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-10-04 09:28:42,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 09:28:42,652 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-10-04 09:28:42,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-04 09:28:42,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:42,653 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1] [2018-10-04 09:28:42,653 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:42,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:42,653 INFO L82 PathProgramCache]: Analyzing trace with hash -775070265, now seen corresponding path program 42 times [2018-10-04 09:28:42,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:42,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:42,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:42,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:42,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:44,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:44,282 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 [2018-10-04 09:28:44,289 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:44,428 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2018-10-04 09:28:44,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:44,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:44,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:44,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 09:28:44,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 09:28:44,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 09:28:44,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:28:44,487 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 68 states. [2018-10-04 09:28:44,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:44,743 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2018-10-04 09:28:44,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 09:28:44,744 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 197 [2018-10-04 09:28:44,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:44,744 INFO L225 Difference]: With dead ends: 206 [2018-10-04 09:28:44,744 INFO L226 Difference]: Without dead ends: 202 [2018-10-04 09:28:44,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:28:44,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-10-04 09:28:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-10-04 09:28:44,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-10-04 09:28:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2018-10-04 09:28:44,748 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 197 [2018-10-04 09:28:44,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:44,749 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2018-10-04 09:28:44,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 09:28:44,749 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2018-10-04 09:28:44,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-04 09:28:44,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:44,749 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1] [2018-10-04 09:28:44,750 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:44,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:44,750 INFO L82 PathProgramCache]: Analyzing trace with hash -374489323, now seen corresponding path program 65 times [2018-10-04 09:28:44,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:44,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:44,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:44,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:44,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:46,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:46,342 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 [2018-10-04 09:28:46,349 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:46,477 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-10-04 09:28:46,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:46,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:46,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:46,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 09:28:46,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 09:28:46,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 09:28:46,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:28:46,536 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand 68 states. [2018-10-04 09:28:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:46,715 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2018-10-04 09:28:46,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 09:28:46,715 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 200 [2018-10-04 09:28:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:46,716 INFO L225 Difference]: With dead ends: 207 [2018-10-04 09:28:46,716 INFO L226 Difference]: Without dead ends: 203 [2018-10-04 09:28:46,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:28:46,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-04 09:28:46,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-04 09:28:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-04 09:28:46,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-10-04 09:28:46,719 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-10-04 09:28:46,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:46,720 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-10-04 09:28:46,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 09:28:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-10-04 09:28:46,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-04 09:28:46,720 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:46,721 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1] [2018-10-04 09:28:46,721 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:46,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:46,721 INFO L82 PathProgramCache]: Analyzing trace with hash -374489261, now seen corresponding path program 43 times [2018-10-04 09:28:46,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:46,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:46,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:46,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:46,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:48,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:48,437 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 [2018-10-04 09:28:48,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:48,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:48,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:48,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 09:28:48,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 09:28:48,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 09:28:48,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 09:28:48,561 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 69 states. [2018-10-04 09:28:48,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:48,709 INFO L93 Difference]: Finished difference Result 209 states and 215 transitions. [2018-10-04 09:28:48,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 09:28:48,710 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 200 [2018-10-04 09:28:48,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:48,711 INFO L225 Difference]: With dead ends: 209 [2018-10-04 09:28:48,711 INFO L226 Difference]: Without dead ends: 205 [2018-10-04 09:28:48,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 09:28:48,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-04 09:28:48,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-04 09:28:48,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-04 09:28:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-10-04 09:28:48,715 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 200 [2018-10-04 09:28:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:48,716 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-10-04 09:28:48,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 09:28:48,716 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-10-04 09:28:48,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-04 09:28:48,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:48,717 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1] [2018-10-04 09:28:48,717 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:48,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:48,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1915052553, now seen corresponding path program 66 times [2018-10-04 09:28:48,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:48,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:48,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:48,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:48,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 67 proven. 6633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:50,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:50,677 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 [2018-10-04 09:28:50,685 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:50,811 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-10-04 09:28:50,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:50,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 6700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:54,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:54,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-10-04 09:28:54,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-10-04 09:28:54,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-10-04 09:28:54,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4760, Invalid=13872, Unknown=0, NotChecked=0, Total=18632 [2018-10-04 09:28:54,064 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 137 states. [2018-10-04 09:29:02,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:02,587 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2018-10-04 09:29:02,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-10-04 09:29:02,588 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 203 [2018-10-04 09:29:02,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:02,589 INFO L225 Difference]: With dead ends: 212 [2018-10-04 09:29:02,589 INFO L226 Difference]: Without dead ends: 208 [2018-10-04 09:29:02,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13399 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=23118, Invalid=50052, Unknown=0, NotChecked=0, Total=73170 [2018-10-04 09:29:02,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-10-04 09:29:02,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-10-04 09:29:02,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-04 09:29:02,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2018-10-04 09:29:02,596 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 203 [2018-10-04 09:29:02,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:02,596 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2018-10-04 09:29:02,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-10-04 09:29:02,596 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2018-10-04 09:29:02,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-04 09:29:02,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:02,597 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1] [2018-10-04 09:29:02,598 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:02,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:02,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452693, now seen corresponding path program 67 times [2018-10-04 09:29:02,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:02,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:02,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:02,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:02,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:04,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:04,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:29:04,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:04,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:04,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:04,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 09:29:04,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 09:29:04,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 09:29:04,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:29:04,478 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand 70 states. [2018-10-04 09:29:04,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:04,599 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2018-10-04 09:29:04,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 09:29:04,599 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 206 [2018-10-04 09:29:04,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:04,600 INFO L225 Difference]: With dead ends: 213 [2018-10-04 09:29:04,600 INFO L226 Difference]: Without dead ends: 209 [2018-10-04 09:29:04,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:29:04,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-04 09:29:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-10-04 09:29:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-04 09:29:04,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-10-04 09:29:04,605 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-10-04 09:29:04,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:04,605 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-10-04 09:29:04,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 09:29:04,606 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-10-04 09:29:04,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-04 09:29:04,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:04,606 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1] [2018-10-04 09:29:04,606 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:04,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:04,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452755, now seen corresponding path program 44 times [2018-10-04 09:29:04,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:04,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:04,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:04,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:04,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:06,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:06,677 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 [2018-10-04 09:29:06,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:29:06,746 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:29:06,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:06,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:06,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:06,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 09:29:06,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 09:29:06,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 09:29:06,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:29:06,806 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 71 states. [2018-10-04 09:29:06,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:06,996 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2018-10-04 09:29:06,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 09:29:06,996 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 206 [2018-10-04 09:29:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:06,997 INFO L225 Difference]: With dead ends: 215 [2018-10-04 09:29:06,997 INFO L226 Difference]: Without dead ends: 211 [2018-10-04 09:29:06,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:29:06,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-04 09:29:07,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-04 09:29:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-04 09:29:07,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-10-04 09:29:07,001 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 206 [2018-10-04 09:29:07,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:07,001 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-10-04 09:29:07,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 09:29:07,001 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-10-04 09:29:07,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-04 09:29:07,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:07,002 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1] [2018-10-04 09:29:07,002 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:07,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:07,002 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289353, now seen corresponding path program 68 times [2018-10-04 09:29:07,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:07,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:07,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:07,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:07,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:08,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:08,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:29:08,781 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:29:08,856 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:29:08,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:08,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:08,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:08,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 09:29:08,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 09:29:08,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 09:29:08,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:29:08,944 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 71 states. [2018-10-04 09:29:09,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:09,143 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2018-10-04 09:29:09,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 09:29:09,143 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 209 [2018-10-04 09:29:09,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:09,144 INFO L225 Difference]: With dead ends: 216 [2018-10-04 09:29:09,144 INFO L226 Difference]: Without dead ends: 212 [2018-10-04 09:29:09,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:29:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-04 09:29:09,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-10-04 09:29:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-10-04 09:29:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2018-10-04 09:29:09,148 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 209 [2018-10-04 09:29:09,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:09,148 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2018-10-04 09:29:09,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 09:29:09,148 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2018-10-04 09:29:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-04 09:29:09,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:09,149 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1] [2018-10-04 09:29:09,149 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:09,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:09,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289415, now seen corresponding path program 45 times [2018-10-04 09:29:09,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:09,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:09,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:09,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:09,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:11,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:11,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:29:11,261 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:29:11,422 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-04 09:29:11,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:11,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:11,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:11,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 09:29:11,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 09:29:11,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 09:29:11,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 09:29:11,486 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand 72 states. [2018-10-04 09:29:11,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:11,705 INFO L93 Difference]: Finished difference Result 218 states and 224 transitions. [2018-10-04 09:29:11,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 09:29:11,706 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 209 [2018-10-04 09:29:11,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:11,707 INFO L225 Difference]: With dead ends: 218 [2018-10-04 09:29:11,707 INFO L226 Difference]: Without dead ends: 214 [2018-10-04 09:29:11,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 09:29:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-10-04 09:29:11,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-10-04 09:29:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-04 09:29:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2018-10-04 09:29:11,711 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 209 [2018-10-04 09:29:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:11,712 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2018-10-04 09:29:11,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 09:29:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2018-10-04 09:29:11,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-04 09:29:11,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:11,712 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1] [2018-10-04 09:29:11,712 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:11,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:11,713 INFO L82 PathProgramCache]: Analyzing trace with hash -645499371, now seen corresponding path program 69 times [2018-10-04 09:29:11,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:11,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:11,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:11,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:11,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 70 proven. 7245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:13,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:13,568 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 [2018-10-04 09:29:13,577 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:29:13,724 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-10-04 09:29:13,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:13,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-04 09:29:14,596 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-04 09:29:14,797 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:14,797 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:29:14,802 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:29:14,803 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:29:14 BoogieIcfgContainer [2018-10-04 09:29:14,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:29:14,804 INFO L168 Benchmark]: Toolchain (without parser) took 234073.17 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 217.6 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -84.7 MB). Peak memory consumption was 132.9 MB. Max. memory is 7.1 GB. [2018-10-04 09:29:14,805 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:29:14,805 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.94 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. [2018-10-04 09:29:14,806 INFO L168 Benchmark]: Boogie Preprocessor took 25.65 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. [2018-10-04 09:29:14,806 INFO L168 Benchmark]: RCFGBuilder took 298.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:29:14,806 INFO L168 Benchmark]: TraceAbstraction took 233695.04 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 217.6 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -105.8 MB). Peak memory consumption was 111.7 MB. Max. memory is 7.1 GB. [2018-10-04 09:29:14,808 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.94 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 25.65 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 298.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233695.04 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 217.6 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -105.8 MB). Peak memory consumption was 111.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 30). Cancelled while BasicCegarLoop was analyzing trace of length 213 with TraceHistMax 70, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 96 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 233.6s OverallTime, 116 OverallIterations, 70 TraceHistogramMax, 90.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 667 SDtfs, 2487 SDslu, 11223 SDs, 0 SdLazy, 12781 SolverSat, 1111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17913 GetRequests, 11381 SyntacticMatches, 0 SemanticMatches, 6532 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108474 ImplicationChecksByTransitivity, 191.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=115, 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: 0.4s AutomataMinimizationTime, 115 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 7.1s SatisfiabilityAnalysisTime, 126.3s InterpolantComputationTime, 24537 NumberOfCodeBlocks, 24537 NumberOfCodeBlocksAsserted, 2247 NumberOfCheckSat, 24309 ConstructedInterpolants, 0 QuantifiedInterpolants, 10237847 SizeOfPredicates, 0 NumberOfNonLiveVariables, 29108 ConjunctsInSsa, 4195 ConjunctsInUnsatCore, 228 InterpolantComputations, 2 PerfectInterpolantSequences, 4013/558041 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/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-29-14-817.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-29-14-817.csv Completed graceful shutdown