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/doubleLoopUniformIterations.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 08:56:53,691 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:56:53,693 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:56:53,705 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:56:53,706 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:56:53,707 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:56:53,708 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:56:53,710 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:56:53,711 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:56:53,712 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:56:53,713 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-03 08:56:53,737 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 [2018-10-03 08:56:53,752 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:56:53,753 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:56:53,754 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:56:53,754 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:56:53,755 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:56:53,755 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:56:53,755 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:56:53,755 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:56:53,755 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:56:53,756 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:56:53,756 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:56:53,756 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:56:53,756 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:56:53,756 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:56:53,757 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:56:53,757 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:56:53,757 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:56:53,757 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:56:53,758 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:56:53,758 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:56:53,758 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:56:53,758 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:56:53,758 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:56:53,759 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:56:53,759 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:56:53,759 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:56:53,759 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:56:53,759 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:56:53,760 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:56:53,760 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:56:53,814 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:56:53,827 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:56:53,830 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:56:53,832 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:56:53,833 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:56:53,834 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl [2018-10-03 08:56:53,835 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl' [2018-10-03 08:56:53,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:56:53,891 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:56:53,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:56:53,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:56:53,892 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:56:53,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:53" (1/1) ... [2018-10-03 08:56:53,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:53" (1/1) ... [2018-10-03 08:56:53,934 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-03 08:56:53,934 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-03 08:56:53,934 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-03 08:56:53,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:56:53,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:56:53,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:56:53,938 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:56:53,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:53" (1/1) ... [2018-10-03 08:56:53,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:53" (1/1) ... [2018-10-03 08:56:53,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:53" (1/1) ... [2018-10-03 08:56:53,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:53" (1/1) ... [2018-10-03 08:56:53,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:53" (1/1) ... [2018-10-03 08:56:53,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:53" (1/1) ... [2018-10-03 08:56:53,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:53" (1/1) ... [2018-10-03 08:56:53,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:56:53,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:56:53,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:56:53,966 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:56:53,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:53" (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 [2018-10-03 08:56:54,040 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2018-10-03 08:56:54,041 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2018-10-03 08:56:54,207 INFO L337 CfgBuilder]: Using library mode [2018-10-03 08:56:54,208 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:56:54 BoogieIcfgContainer [2018-10-03 08:56:54,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:56:54,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:56:54,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:56:54,212 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:56:54,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:53" (1/2) ... [2018-10-03 08:56:54,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba9c70e and model type doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:56:54, skipping insertion in model container [2018-10-03 08:56:54,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:56:54" (2/2) ... [2018-10-03 08:56:54,216 INFO L112 eAbstractionObserver]: Analyzing ICFG doubleLoopUniformIterations.bpl [2018-10-03 08:56:54,226 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:56:54,234 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-10-03 08:56:54,287 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:56:54,288 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:56:54,288 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:56:54,288 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:56:54,288 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:56:54,288 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:56:54,289 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:56:54,289 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:56:54,289 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:56:54,304 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-03 08:56:54,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-03 08:56:54,311 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:54,312 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-03 08:56:54,313 INFO L423 AbstractCegarLoop]: === Iteration 1 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:54,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:54,320 INFO L82 PathProgramCache]: Analyzing trace with hash 926725, now seen corresponding path program 1 times [2018-10-03 08:56:54,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:54,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:54,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:54,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:54,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:54,460 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:56:54,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-03 08:56:54,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:56:54,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:56:54,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:56:54,481 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-10-03 08:56:54,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:54,588 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-10-03 08:56:54,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:56:54,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-03 08:56:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:54,618 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:56:54,618 INFO L226 Difference]: Without dead ends: 8 [2018-10-03 08:56:54,630 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 [2018-10-03 08:56:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-03 08:56:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-03 08:56:54,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-03 08:56:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-03 08:56:54,706 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2018-10-03 08:56:54,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:54,707 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-03 08:56:54,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:56:54,707 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-03 08:56:54,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-03 08:56:54,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:54,708 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-03 08:56:54,708 INFO L423 AbstractCegarLoop]: === Iteration 2 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:54,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:54,709 INFO L82 PathProgramCache]: Analyzing trace with hash 28728519, now seen corresponding path program 1 times [2018-10-03 08:56:54,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:54,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:54,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:54,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:54,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:54,737 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:56:54,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-03 08:56:54,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:56:54,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:56:54,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:56:54,740 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2018-10-03 08:56:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:54,770 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-03 08:56:54,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:56:54,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-10-03 08:56:54,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:54,775 INFO L225 Difference]: With dead ends: 11 [2018-10-03 08:56:54,776 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 08:56:54,777 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 [2018-10-03 08:56:54,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 08:56:54,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 08:56:54,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 08:56:54,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-10-03 08:56:54,779 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-10-03 08:56:54,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:54,780 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-10-03 08:56:54,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:56:54,780 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-10-03 08:56:54,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:56:54,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:54,786 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-03 08:56:54,786 INFO L423 AbstractCegarLoop]: === Iteration 3 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:54,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:54,787 INFO L82 PathProgramCache]: Analyzing trace with hash 891297133, now seen corresponding path program 1 times [2018-10-03 08:56:54,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:54,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:54,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:54,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:54,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:54,858 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:56:54,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-03 08:56:54,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:56:54,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:56:54,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:56:54,859 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-10-03 08:56:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:54,911 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-03 08:56:54,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:56:54,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-03 08:56:54,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:54,912 INFO L225 Difference]: With dead ends: 11 [2018-10-03 08:56:54,912 INFO L226 Difference]: Without dead ends: 8 [2018-10-03 08:56:54,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:56:54,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-03 08:56:54,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-03 08:56:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-03 08:56:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-10-03 08:56:54,917 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-10-03 08:56:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:54,917 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-10-03 08:56:54,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:56:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-10-03 08:56:54,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 08:56:54,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:54,918 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:56:54,918 INFO L423 AbstractCegarLoop]: === Iteration 4 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:54,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:54,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1860345825, now seen corresponding path program 1 times [2018-10-03 08:56:54,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:54,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:54,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:54,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:54,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:55,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:55,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:55,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:55,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:55,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:55,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-03 08:56:55,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:56:55,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:56:55,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:56:55,129 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-10-03 08:56:55,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:55,160 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-10-03 08:56:55,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:56:55,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-10-03 08:56:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:55,162 INFO L225 Difference]: With dead ends: 14 [2018-10-03 08:56:55,162 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 08:56:55,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:56:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 08:56:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-10-03 08:56:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 08:56:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-10-03 08:56:55,167 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-10-03 08:56:55,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:55,167 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-10-03 08:56:55,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:56:55,168 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-10-03 08:56:55,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:56:55,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:55,168 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-03 08:56:55,168 INFO L423 AbstractCegarLoop]: === Iteration 5 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:55,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:55,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1836084205, now seen corresponding path program 2 times [2018-10-03 08:56:55,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:55,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:55,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:55,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:55,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:55,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:55,247 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 [2018-10-03 08:56:55,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:55,295 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:55,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:55,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:55,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:55,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:56:55,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:56:55,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:56:55,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:56:55,333 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2018-10-03 08:56:55,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:55,390 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-10-03 08:56:55,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:56:55,391 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-03 08:56:55,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:55,392 INFO L225 Difference]: With dead ends: 15 [2018-10-03 08:56:55,392 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 08:56:55,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:56:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 08:56:55,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 08:56:55,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 08:56:55,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-03 08:56:55,396 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2018-10-03 08:56:55,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:55,396 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-03 08:56:55,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:56:55,396 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-03 08:56:55,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:56:55,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:55,397 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-03 08:56:55,398 INFO L423 AbstractCegarLoop]: === Iteration 6 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:55,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:55,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1860095751, now seen corresponding path program 3 times [2018-10-03 08:56:55,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:55,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:55,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:55,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:55,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:55,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:55,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:55,613 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:55,626 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-03 08:56:55,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:55,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:55,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:55,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:56:55,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:56:55,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:56:55,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:56:55,656 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-03 08:56:55,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:55,735 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-03 08:56:55,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:56:55,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-03 08:56:55,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:55,736 INFO L225 Difference]: With dead ends: 13 [2018-10-03 08:56:55,736 INFO L226 Difference]: Without dead ends: 10 [2018-10-03 08:56:55,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:56:55,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-03 08:56:55,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-03 08:56:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 08:56:55,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-10-03 08:56:55,740 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-10-03 08:56:55,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:55,741 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-10-03 08:56:55,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:56:55,741 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-10-03 08:56:55,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:56:55,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:55,742 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2018-10-03 08:56:55,742 INFO L423 AbstractCegarLoop]: === Iteration 7 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:55,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:55,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1828331911, now seen corresponding path program 4 times [2018-10-03 08:56:55,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:55,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:55,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:55,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:55,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:55,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:55,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:55,892 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:55,910 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:55,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:55,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:55,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:55,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 08:56:55,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:56:55,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:56:55,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:56:55,947 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2018-10-03 08:56:56,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:56,039 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-10-03 08:56:56,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:56:56,041 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-10-03 08:56:56,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:56,041 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:56:56,042 INFO L226 Difference]: Without dead ends: 14 [2018-10-03 08:56:56,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:56:56,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-03 08:56:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2018-10-03 08:56:56,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 08:56:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-03 08:56:56,049 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-03 08:56:56,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:56,049 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-03 08:56:56,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:56:56,049 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-03 08:56:56,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 08:56:56,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:56,050 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-10-03 08:56:56,050 INFO L423 AbstractCegarLoop]: === Iteration 8 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:56,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:56,051 INFO L82 PathProgramCache]: Analyzing trace with hash 843652871, now seen corresponding path program 5 times [2018-10-03 08:56:56,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:56,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:56,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:56,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:56,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:56,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:56,129 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 [2018-10-03 08:56:56,137 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:56,149 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-10-03 08:56:56,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:56,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:56,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:56,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:56:56,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:56:56,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:56:56,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:56:56,185 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2018-10-03 08:56:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:56,221 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-10-03 08:56:56,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:56:56,222 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-03 08:56:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:56,223 INFO L225 Difference]: With dead ends: 18 [2018-10-03 08:56:56,223 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 08:56:56,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:56:56,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 08:56:56,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 08:56:56,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 08:56:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-03 08:56:56,227 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-10-03 08:56:56,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:56,227 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-03 08:56:56,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:56:56,228 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-03 08:56:56,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 08:56:56,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:56,228 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-10-03 08:56:56,229 INFO L423 AbstractCegarLoop]: === Iteration 9 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:56,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:56,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1588010797, now seen corresponding path program 6 times [2018-10-03 08:56:56,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:56,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:56,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:56,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:56,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:56,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:56,318 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 [2018-10-03 08:56:56,325 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:56,335 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-03 08:56:56,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:56,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:56,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:56,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:56:56,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:56:56,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:56:56,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:56:56,374 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-10-03 08:56:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:56,409 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-10-03 08:56:56,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:56:56,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-03 08:56:56,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:56,410 INFO L225 Difference]: With dead ends: 15 [2018-10-03 08:56:56,411 INFO L226 Difference]: Without dead ends: 12 [2018-10-03 08:56:56,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:56:56,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-03 08:56:56,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-03 08:56:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 08:56:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-10-03 08:56:56,415 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-10-03 08:56:56,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:56,415 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-10-03 08:56:56,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:56:56,415 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-10-03 08:56:56,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:56:56,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:56,416 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:56:56,416 INFO L423 AbstractCegarLoop]: === Iteration 10 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:56,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:56,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1983632929, now seen corresponding path program 7 times [2018-10-03 08:56:56,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:56,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:56,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:56,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:56,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:56,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:56,572 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 [2018-10-03 08:56:56,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:56,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:56,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:56,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:56:56,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:56:56,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:56:56,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:56:56,688 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2018-10-03 08:56:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:56,977 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-03 08:56:56,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:56:56,978 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-10-03 08:56:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:56,978 INFO L225 Difference]: With dead ends: 20 [2018-10-03 08:56:56,978 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:56:56,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:56:56,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:56:56,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-03 08:56:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:56:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-03 08:56:56,982 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-10-03 08:56:56,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:56,982 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-03 08:56:56,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:56:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-03 08:56:56,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 08:56:56,983 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:56,983 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-10-03 08:56:56,983 INFO L423 AbstractCegarLoop]: === Iteration 11 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:56,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:56,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1363017133, now seen corresponding path program 8 times [2018-10-03 08:56:56,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:56,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:56,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:56,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:56,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:57,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:57,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:57,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:57,077 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:57,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:57,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:57,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:57,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:56:57,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:56:57,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:56:57,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:56:57,111 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2018-10-03 08:56:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:57,152 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-10-03 08:56:57,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:56:57,152 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-03 08:56:57,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:57,153 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:56:57,153 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:56:57,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:56:57,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:56:57,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 08:56:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 08:56:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-03 08:56:57,157 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2018-10-03 08:56:57,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:57,157 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-03 08:56:57,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:56:57,158 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-03 08:56:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 08:56:57,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:57,158 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-10-03 08:56:57,159 INFO L423 AbstractCegarLoop]: === Iteration 12 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:57,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:57,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1331690937, now seen corresponding path program 9 times [2018-10-03 08:56:57,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:57,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:57,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:57,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:57,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:57,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:57,261 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 [2018-10-03 08:56:57,272 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:57,282 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-03 08:56:57,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:57,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:57,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:57,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:56:57,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:56:57,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:56:57,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:56:57,324 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-10-03 08:56:57,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:57,364 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-03 08:56:57,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:56:57,365 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-03 08:56:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:57,366 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:56:57,366 INFO L226 Difference]: Without dead ends: 14 [2018-10-03 08:56:57,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:56:57,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-03 08:56:57,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-03 08:56:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:56:57,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-03 08:56:57,370 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-10-03 08:56:57,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:57,371 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-03 08:56:57,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:56:57,371 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-03 08:56:57,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:56:57,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:57,371 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2018-10-03 08:56:57,372 INFO L423 AbstractCegarLoop]: === Iteration 13 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:57,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:57,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1667192391, now seen corresponding path program 10 times [2018-10-03 08:56:57,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:57,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:57,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:57,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:57,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:57,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:57,627 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 [2018-10-03 08:56:57,637 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:57,656 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:57,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:57,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:57,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:57,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:56:57,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:56:57,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:56:57,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:56:57,688 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-10-03 08:56:57,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:57,807 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-10-03 08:56:57,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:56:57,808 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-10-03 08:56:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:57,809 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:56:57,809 INFO L226 Difference]: Without dead ends: 20 [2018-10-03 08:56:57,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:56:57,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-03 08:56:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2018-10-03 08:56:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:56:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-03 08:56:57,814 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-10-03 08:56:57,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:57,814 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-03 08:56:57,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:56:57,814 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-03 08:56:57,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 08:56:57,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:57,815 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-10-03 08:56:57,816 INFO L423 AbstractCegarLoop]: === Iteration 14 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:57,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:57,816 INFO L82 PathProgramCache]: Analyzing trace with hash 143295047, now seen corresponding path program 11 times [2018-10-03 08:56:57,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:57,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:57,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:57,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:57,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:57,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:57,917 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 [2018-10-03 08:56:57,931 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:57,962 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 08:56:57,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:57,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:57,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:57,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:56:57,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:56:57,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:56:57,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:56:57,996 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2018-10-03 08:56:58,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:58,058 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-10-03 08:56:58,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:56:58,058 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-03 08:56:58,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:58,059 INFO L225 Difference]: With dead ends: 24 [2018-10-03 08:56:58,059 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:56:58,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:56:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:56:58,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 08:56:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 08:56:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-03 08:56:58,062 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-10-03 08:56:58,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:58,063 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-03 08:56:58,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:56:58,063 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-03 08:56:58,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 08:56:58,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:58,064 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-10-03 08:56:58,064 INFO L423 AbstractCegarLoop]: === Iteration 15 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:58,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:58,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1788276499, now seen corresponding path program 12 times [2018-10-03 08:56:58,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:58,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:58,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:58,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:58,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:58,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:58,173 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 [2018-10-03 08:56:58,181 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:58,202 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-03 08:56:58,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:58,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:58,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:58,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:56:58,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:56:58,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:56:58,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:56:58,232 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-10-03 08:56:58,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:58,273 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-10-03 08:56:58,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:56:58,274 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-03 08:56:58,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:58,274 INFO L225 Difference]: With dead ends: 19 [2018-10-03 08:56:58,275 INFO L226 Difference]: Without dead ends: 16 [2018-10-03 08:56:58,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:56:58,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-03 08:56:58,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-03 08:56:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:56:58,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-03 08:56:58,279 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2018-10-03 08:56:58,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:58,279 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-03 08:56:58,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:56:58,280 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-03 08:56:58,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:56:58,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:58,280 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2018-10-03 08:56:58,281 INFO L423 AbstractCegarLoop]: === Iteration 16 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:58,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:58,281 INFO L82 PathProgramCache]: Analyzing trace with hash 397941857, now seen corresponding path program 13 times [2018-10-03 08:56:58,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:58,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:58,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:58,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:58,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:58,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:58,480 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 [2018-10-03 08:56:58,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:58,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:58,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:58,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:56:58,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:56:58,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:56:58,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:56:58,557 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-10-03 08:56:58,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:58,659 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-03 08:56:58,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:56:58,660 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-10-03 08:56:58,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:58,661 INFO L225 Difference]: With dead ends: 26 [2018-10-03 08:56:58,661 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:56:58,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:56:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:56:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-10-03 08:56:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:56:58,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-10-03 08:56:58,666 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2018-10-03 08:56:58,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:58,666 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-10-03 08:56:58,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:56:58,666 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-10-03 08:56:58,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 08:56:58,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:58,667 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-10-03 08:56:58,667 INFO L423 AbstractCegarLoop]: === Iteration 17 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:58,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:58,667 INFO L82 PathProgramCache]: Analyzing trace with hash -548765843, now seen corresponding path program 14 times [2018-10-03 08:56:58,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:58,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:58,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:58,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:58,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:58,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:58,744 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 [2018-10-03 08:56:58,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:58,765 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:58,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:58,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:58,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:58,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:56:58,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:56:58,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:56:58,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:56:58,801 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2018-10-03 08:56:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:58,838 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-10-03 08:56:58,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:56:58,838 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-03 08:56:58,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:58,839 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:56:58,839 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:56:58,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:56:58,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:56:58,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 08:56:58,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 08:56:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-03 08:56:58,844 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2018-10-03 08:56:58,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:58,845 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-03 08:56:58,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:56:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-03 08:56:58,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 08:56:58,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:58,846 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-10-03 08:56:58,846 INFO L423 AbstractCegarLoop]: === Iteration 18 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:58,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:58,847 INFO L82 PathProgramCache]: Analyzing trace with hash -297941625, now seen corresponding path program 15 times [2018-10-03 08:56:58,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:58,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:58,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:58,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:58,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:59,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:59,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:59,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:59,085 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-03 08:56:59,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:59,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:59,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:59,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:56:59,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:56:59,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:56:59,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:56:59,125 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-03 08:56:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:59,180 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-03 08:56:59,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:56:59,181 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-03 08:56:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:59,181 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:56:59,181 INFO L226 Difference]: Without dead ends: 18 [2018-10-03 08:56:59,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:56:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-03 08:56:59,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-03 08:56:59,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:56:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-03 08:56:59,185 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2018-10-03 08:56:59,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:59,185 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-03 08:56:59,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:56:59,186 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-03 08:56:59,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:56:59,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:59,186 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2018-10-03 08:56:59,187 INFO L423 AbstractCegarLoop]: === Iteration 19 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:59,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:59,187 INFO L82 PathProgramCache]: Analyzing trace with hash -646317305, now seen corresponding path program 16 times [2018-10-03 08:56:59,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:59,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:59,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:59,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:59,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:59,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:59,325 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:59,333 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:59,357 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:59,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:59,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:59,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:59,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:56:59,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:56:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:56:59,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:56:59,457 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2018-10-03 08:56:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:59,727 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-10-03 08:56:59,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:56:59,727 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-10-03 08:56:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:59,728 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:56:59,728 INFO L226 Difference]: Without dead ends: 26 [2018-10-03 08:56:59,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:56:59,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-03 08:56:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-10-03 08:56:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:56:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-03 08:56:59,734 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-10-03 08:56:59,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:59,734 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-03 08:56:59,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:56:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-03 08:56:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:56:59,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:59,735 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-10-03 08:56:59,736 INFO L423 AbstractCegarLoop]: === Iteration 20 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:59,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:59,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1438938503, now seen corresponding path program 17 times [2018-10-03 08:56:59,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:59,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:59,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:59,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:59,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:59,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:59,846 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 [2018-10-03 08:56:59,873 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:59,893 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-03 08:56:59,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:59,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:59,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:59,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:56:59,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:56:59,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:56:59,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:56:59,923 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-10-03 08:57:00,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:00,021 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-10-03 08:57:00,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:57:00,022 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-03 08:57:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:00,022 INFO L225 Difference]: With dead ends: 30 [2018-10-03 08:57:00,022 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:57:00,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:57:00,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:57:00,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 08:57:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:57:00,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-03 08:57:00,026 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2018-10-03 08:57:00,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:00,026 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-03 08:57:00,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:57:00,026 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-03 08:57:00,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:57:00,027 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:00,027 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-10-03 08:57:00,027 INFO L423 AbstractCegarLoop]: === Iteration 21 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:00,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:00,027 INFO L82 PathProgramCache]: Analyzing trace with hash 624554669, now seen corresponding path program 18 times [2018-10-03 08:57:00,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:00,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:00,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:00,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:00,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:00,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:00,127 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 [2018-10-03 08:57:00,135 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:00,147 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-03 08:57:00,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:00,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:00,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:00,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:57:00,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:57:00,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:57:00,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:57:00,194 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-10-03 08:57:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:00,252 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-10-03 08:57:00,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:57:00,253 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-03 08:57:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:00,253 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:57:00,254 INFO L226 Difference]: Without dead ends: 20 [2018-10-03 08:57:00,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:57:00,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-03 08:57:00,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-03 08:57:00,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:57:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-03 08:57:00,258 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2018-10-03 08:57:00,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:00,258 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-03 08:57:00,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:57:00,259 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-03 08:57:00,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:00,259 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:00,259 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2018-10-03 08:57:00,260 INFO L423 AbstractCegarLoop]: === Iteration 22 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:00,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:00,260 INFO L82 PathProgramCache]: Analyzing trace with hash -2113703263, now seen corresponding path program 19 times [2018-10-03 08:57:00,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:00,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:00,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:00,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:00,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:00,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:00,445 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 [2018-10-03 08:57:00,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:00,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:00,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:00,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:57:00,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:57:00,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:57:00,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:57:00,563 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2018-10-03 08:57:00,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:00,781 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-03 08:57:00,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:57:00,782 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-10-03 08:57:00,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:00,782 INFO L225 Difference]: With dead ends: 32 [2018-10-03 08:57:00,782 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:57:00,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:57:00,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:57:00,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-03 08:57:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:57:00,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-03 08:57:00,786 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2018-10-03 08:57:00,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:00,786 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-03 08:57:00,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:57:00,787 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-03 08:57:00,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 08:57:00,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:00,787 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-10-03 08:57:00,788 INFO L423 AbstractCegarLoop]: === Iteration 23 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:00,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:00,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1100353235, now seen corresponding path program 20 times [2018-10-03 08:57:00,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:00,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:00,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:00,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:00,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:01,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:01,057 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 [2018-10-03 08:57:01,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:01,078 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:01,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:01,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:01,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:01,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:01,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:01,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:01,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:01,120 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2018-10-03 08:57:01,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:01,404 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-03 08:57:01,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:01,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-03 08:57:01,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:01,405 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:57:01,405 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:57:01,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:01,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:57:01,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 08:57:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 08:57:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-03 08:57:01,411 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-10-03 08:57:01,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:01,412 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-03 08:57:01,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-03 08:57:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 08:57:01,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:01,412 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-10-03 08:57:01,413 INFO L423 AbstractCegarLoop]: === Iteration 24 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:01,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:01,413 INFO L82 PathProgramCache]: Analyzing trace with hash -576448313, now seen corresponding path program 21 times [2018-10-03 08:57:01,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:01,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:01,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:01,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:01,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:01,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:01,618 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 [2018-10-03 08:57:01,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:01,660 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-03 08:57:01,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:01,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:01,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:01,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:01,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:01,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:01,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:01,703 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-10-03 08:57:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:01,761 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-03 08:57:01,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:01,762 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-03 08:57:01,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:01,763 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:57:01,763 INFO L226 Difference]: Without dead ends: 22 [2018-10-03 08:57:01,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:01,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-03 08:57:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-03 08:57:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:57:01,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-03 08:57:01,767 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-10-03 08:57:01,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:01,768 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-03 08:57:01,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-03 08:57:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-03 08:57:01,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:01,769 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2018-10-03 08:57:01,769 INFO L423 AbstractCegarLoop]: === Iteration 25 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:01,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:01,769 INFO L82 PathProgramCache]: Analyzing trace with hash -690090041, now seen corresponding path program 22 times [2018-10-03 08:57:01,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:01,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:01,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:01,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:01,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:02,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:02,028 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 [2018-10-03 08:57:02,041 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:02,061 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:02,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:02,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:02,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:02,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:57:02,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:02,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:02,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:02,148 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2018-10-03 08:57:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:02,304 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-10-03 08:57:02,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:02,304 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2018-10-03 08:57:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:02,305 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:57:02,305 INFO L226 Difference]: Without dead ends: 32 [2018-10-03 08:57:02,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:02,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-03 08:57:02,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2018-10-03 08:57:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:57:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-03 08:57:02,311 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2018-10-03 08:57:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:02,312 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-03 08:57:02,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:02,312 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-03 08:57:02,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:57:02,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:02,313 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-10-03 08:57:02,313 INFO L423 AbstractCegarLoop]: === Iteration 26 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:02,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:02,313 INFO L82 PathProgramCache]: Analyzing trace with hash 81983687, now seen corresponding path program 23 times [2018-10-03 08:57:02,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:02,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:02,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:02,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:02,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:02,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:02,569 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 [2018-10-03 08:57:02,576 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:02,622 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-03 08:57:02,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:02,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:02,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:02,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 08:57:02,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:57:02,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:57:02,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:57:02,666 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2018-10-03 08:57:02,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:02,737 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-10-03 08:57:02,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:57:02,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-03 08:57:02,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:02,738 INFO L225 Difference]: With dead ends: 36 [2018-10-03 08:57:02,739 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:57:02,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:57:02,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:57:02,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 08:57:02,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 08:57:02,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-03 08:57:02,744 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2018-10-03 08:57:02,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:02,744 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-03 08:57:02,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:57:02,745 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-03 08:57:02,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:57:02,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:02,746 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-10-03 08:57:02,746 INFO L423 AbstractCegarLoop]: === Iteration 27 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:02,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:02,746 INFO L82 PathProgramCache]: Analyzing trace with hash -856832915, now seen corresponding path program 24 times [2018-10-03 08:57:02,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:02,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:02,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:02,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:02,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:03,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:03,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:03,022 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:03,035 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-03 08:57:03,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:03,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:03,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:03,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 08:57:03,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:57:03,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:57:03,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:57:03,071 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-10-03 08:57:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:03,110 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-10-03 08:57:03,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:57:03,111 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-03 08:57:03,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:03,112 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:57:03,112 INFO L226 Difference]: Without dead ends: 24 [2018-10-03 08:57:03,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:57:03,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-03 08:57:03,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-03 08:57:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:57:03,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-03 08:57:03,117 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-10-03 08:57:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:03,117 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-03 08:57:03,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:57:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-03 08:57:03,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-03 08:57:03,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:03,118 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2018-10-03 08:57:03,118 INFO L423 AbstractCegarLoop]: === Iteration 28 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:03,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:03,119 INFO L82 PathProgramCache]: Analyzing trace with hash -792078111, now seen corresponding path program 25 times [2018-10-03 08:57:03,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:03,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:03,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:03,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:03,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:03,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:03,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:03,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:03,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:03,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:03,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:03,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:57:03,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:57:03,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:57:03,982 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2018-10-03 08:57:04,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:04,281 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-03 08:57:04,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:57:04,281 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-10-03 08:57:04,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:04,282 INFO L225 Difference]: With dead ends: 38 [2018-10-03 08:57:04,282 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:57:04,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:57:04,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:57:04,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-03 08:57:04,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:57:04,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-03 08:57:04,285 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2018-10-03 08:57:04,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:04,286 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-03 08:57:04,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:57:04,286 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-03 08:57:04,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 08:57:04,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:04,287 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-10-03 08:57:04,287 INFO L423 AbstractCegarLoop]: === Iteration 29 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:04,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:04,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1215320813, now seen corresponding path program 26 times [2018-10-03 08:57:04,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:04,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:04,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:04,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:04,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:04,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:04,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:04,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:04,703 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:04,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:04,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:04,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:04,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 08:57:04,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:57:04,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:57:04,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:57:04,742 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2018-10-03 08:57:04,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:04,797 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-10-03 08:57:04,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:57:04,798 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-03 08:57:04,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:04,798 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:57:04,798 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:57:04,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:57:04,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:57:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 08:57:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 08:57:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-03 08:57:04,803 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2018-10-03 08:57:04,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:04,804 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-03 08:57:04,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:57:04,804 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-03 08:57:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 08:57:04,804 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:04,804 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-10-03 08:57:04,805 INFO L423 AbstractCegarLoop]: === Iteration 30 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:04,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:04,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2118190073, now seen corresponding path program 27 times [2018-10-03 08:57:04,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:04,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:04,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:04,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:04,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:04,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:04,915 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 [2018-10-03 08:57:04,924 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:04,942 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 08:57:04,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:04,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:04,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:04,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 08:57:04,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:57:04,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:57:04,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:57:04,981 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2018-10-03 08:57:05,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:05,035 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-03 08:57:05,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:57:05,036 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-03 08:57:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:05,036 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:57:05,036 INFO L226 Difference]: Without dead ends: 26 [2018-10-03 08:57:05,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:57:05,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-03 08:57:05,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-03 08:57:05,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:57:05,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-10-03 08:57:05,041 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2018-10-03 08:57:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:05,041 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-10-03 08:57:05,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:57:05,042 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-10-03 08:57:05,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-03 08:57:05,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:05,042 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2018-10-03 08:57:05,042 INFO L423 AbstractCegarLoop]: === Iteration 31 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:05,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:05,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1239444345, now seen corresponding path program 28 times [2018-10-03 08:57:05,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:05,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:05,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:05,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:05,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:05,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:05,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:05,313 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:05,325 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:05,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:05,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:05,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:05,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 08:57:05,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:57:05,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:57:05,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:57:05,357 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2018-10-03 08:57:05,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:05,553 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-03 08:57:05,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:57:05,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-10-03 08:57:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:05,554 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:57:05,555 INFO L226 Difference]: Without dead ends: 38 [2018-10-03 08:57:05,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:57:05,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-03 08:57:05,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2018-10-03 08:57:05,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:57:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-03 08:57:05,559 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2018-10-03 08:57:05,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:05,560 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-03 08:57:05,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:57:05,560 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-03 08:57:05,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:57:05,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:05,561 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-10-03 08:57:05,561 INFO L423 AbstractCegarLoop]: === Iteration 32 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:05,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:05,561 INFO L82 PathProgramCache]: Analyzing trace with hash 231869447, now seen corresponding path program 29 times [2018-10-03 08:57:05,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:05,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:05,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:05,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:05,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:05,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:05,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:05,808 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:05,829 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:57:05,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:05,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:05,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:05,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 08:57:05,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:57:05,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:57:05,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:57:05,866 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-03 08:57:05,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:05,982 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-10-03 08:57:05,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:57:05,982 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-03 08:57:05,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:05,983 INFO L225 Difference]: With dead ends: 42 [2018-10-03 08:57:05,983 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:57:05,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:57:05,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:57:05,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 08:57:05,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 08:57:05,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-03 08:57:05,987 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2018-10-03 08:57:05,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:05,988 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-03 08:57:05,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:57:05,988 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-03 08:57:05,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:57:05,988 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:05,989 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-10-03 08:57:05,989 INFO L423 AbstractCegarLoop]: === Iteration 33 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:05,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:05,989 INFO L82 PathProgramCache]: Analyzing trace with hash -27752915, now seen corresponding path program 30 times [2018-10-03 08:57:05,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:05,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:05,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:05,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:05,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:06,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:06,194 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 [2018-10-03 08:57:06,202 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:06,220 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:57:06,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:06,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:06,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:06,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 08:57:06,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:57:06,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:57:06,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:57:06,268 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-10-03 08:57:06,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:06,366 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-03 08:57:06,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:57:06,366 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-03 08:57:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:06,367 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:57:06,367 INFO L226 Difference]: Without dead ends: 28 [2018-10-03 08:57:06,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:57:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-03 08:57:06,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-03 08:57:06,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:57:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-10-03 08:57:06,372 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2018-10-03 08:57:06,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:06,372 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-10-03 08:57:06,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:57:06,372 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-10-03 08:57:06,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-03 08:57:06,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:06,373 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1] [2018-10-03 08:57:06,373 INFO L423 AbstractCegarLoop]: === Iteration 34 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:06,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:06,373 INFO L82 PathProgramCache]: Analyzing trace with hash -860401887, now seen corresponding path program 31 times [2018-10-03 08:57:06,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:06,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:06,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:06,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:06,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:07,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:07,099 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 [2018-10-03 08:57:07,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:07,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:07,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:07,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 08:57:07,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:57:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:57:07,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:57:07,191 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2018-10-03 08:57:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:07,473 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-03 08:57:07,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:57:07,473 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-03 08:57:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:07,474 INFO L225 Difference]: With dead ends: 44 [2018-10-03 08:57:07,474 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:57:07,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:57:07,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:57:07,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-03 08:57:07,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:57:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-10-03 08:57:07,478 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2018-10-03 08:57:07,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:07,478 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-10-03 08:57:07,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:57:07,479 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-10-03 08:57:07,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:57:07,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:07,479 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-10-03 08:57:07,479 INFO L423 AbstractCegarLoop]: === Iteration 35 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:07,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:07,480 INFO L82 PathProgramCache]: Analyzing trace with hash -902716243, now seen corresponding path program 32 times [2018-10-03 08:57:07,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:07,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:07,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:07,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:07,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:09,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:09,064 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 [2018-10-03 08:57:09,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:09,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:09,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:09,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:09,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:09,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 08:57:09,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:57:09,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:57:09,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:57:09,145 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2018-10-03 08:57:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:09,286 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-10-03 08:57:09,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:57:09,286 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-03 08:57:09,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:09,287 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:57:09,287 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:57:09,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:57:09,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:57:09,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 08:57:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 08:57:09,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-03 08:57:09,290 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2018-10-03 08:57:09,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:09,290 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-03 08:57:09,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:57:09,290 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-03 08:57:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:57:09,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:09,291 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-10-03 08:57:09,291 INFO L423 AbstractCegarLoop]: === Iteration 36 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:09,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:09,291 INFO L82 PathProgramCache]: Analyzing trace with hash -361074873, now seen corresponding path program 33 times [2018-10-03 08:57:09,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:09,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:09,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:09,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:09,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:09,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:09,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:09,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:09,587 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-03 08:57:09,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:09,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:09,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:09,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 08:57:09,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:57:09,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:57:09,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:57:09,618 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2018-10-03 08:57:09,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:09,936 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-03 08:57:09,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:57:09,936 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-03 08:57:09,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:09,937 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:57:09,937 INFO L226 Difference]: Without dead ends: 30 [2018-10-03 08:57:09,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:57:09,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-03 08:57:09,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-03 08:57:09,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:57:09,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-03 08:57:09,942 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2018-10-03 08:57:09,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:09,943 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-03 08:57:09,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:57:09,943 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-03 08:57:09,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-03 08:57:09,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:09,943 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1] [2018-10-03 08:57:09,944 INFO L423 AbstractCegarLoop]: === Iteration 37 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:09,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:09,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1691519303, now seen corresponding path program 34 times [2018-10-03 08:57:09,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:09,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:09,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:09,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:09,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:10,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:10,429 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 [2018-10-03 08:57:10,435 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:10,451 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:10,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:10,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:10,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:10,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 08:57:10,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:57:10,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:57:10,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:57:10,484 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-10-03 08:57:10,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:10,735 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-10-03 08:57:10,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:57:10,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-10-03 08:57:10,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:10,736 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:57:10,736 INFO L226 Difference]: Without dead ends: 44 [2018-10-03 08:57:10,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:57:10,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-03 08:57:10,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2018-10-03 08:57:10,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:57:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-03 08:57:10,740 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-10-03 08:57:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:10,740 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-03 08:57:10,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:57:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-03 08:57:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:57:10,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:10,741 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-10-03 08:57:10,741 INFO L423 AbstractCegarLoop]: === Iteration 38 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:10,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:10,742 INFO L82 PathProgramCache]: Analyzing trace with hash 897429319, now seen corresponding path program 35 times [2018-10-03 08:57:10,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:10,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:10,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:10,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:10,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:11,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:11,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:11,137 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:11,156 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:57:11,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:11,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:11,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:11,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 08:57:11,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:57:11,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:57:11,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:57:11,185 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2018-10-03 08:57:11,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:11,283 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-10-03 08:57:11,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:57:11,284 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-03 08:57:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:11,284 INFO L225 Difference]: With dead ends: 48 [2018-10-03 08:57:11,284 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:57:11,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:57:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:57:11,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 08:57:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:57:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-03 08:57:11,289 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 30 [2018-10-03 08:57:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:11,289 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-03 08:57:11,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:57:11,289 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-03 08:57:11,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:57:11,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:11,289 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-10-03 08:57:11,290 INFO L423 AbstractCegarLoop]: === Iteration 39 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:11,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:11,290 INFO L82 PathProgramCache]: Analyzing trace with hash 508442605, now seen corresponding path program 36 times [2018-10-03 08:57:11,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:11,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:11,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:11,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:11,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:11,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:11,424 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 [2018-10-03 08:57:11,432 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:11,450 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:57:11,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:11,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:11,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:11,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 08:57:11,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:57:11,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:57:11,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:57:11,484 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-10-03 08:57:11,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:11,533 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-10-03 08:57:11,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:57:11,533 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-03 08:57:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:11,534 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:57:11,534 INFO L226 Difference]: Without dead ends: 32 [2018-10-03 08:57:11,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:57:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-03 08:57:11,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-03 08:57:11,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:57:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-10-03 08:57:11,538 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2018-10-03 08:57:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:11,538 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-10-03 08:57:11,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:57:11,538 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-10-03 08:57:11,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-03 08:57:11,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:11,539 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1] [2018-10-03 08:57:11,539 INFO L423 AbstractCegarLoop]: === Iteration 40 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:11,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:11,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1418209951, now seen corresponding path program 37 times [2018-10-03 08:57:11,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:11,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:11,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:11,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:11,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:11,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:11,793 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 [2018-10-03 08:57:11,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:11,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:11,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:11,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 08:57:11,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:57:11,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:57:11,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:57:11,853 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2018-10-03 08:57:12,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:12,110 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-03 08:57:12,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:57:12,110 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-10-03 08:57:12,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:12,111 INFO L225 Difference]: With dead ends: 50 [2018-10-03 08:57:12,111 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:57:12,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:57:12,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:57:12,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-03 08:57:12,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-03 08:57:12,115 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2018-10-03 08:57:12,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:12,115 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-03 08:57:12,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:57:12,116 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-03 08:57:12,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 08:57:12,116 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:12,116 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-10-03 08:57:12,116 INFO L423 AbstractCegarLoop]: === Iteration 41 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:12,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:12,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1014897043, now seen corresponding path program 38 times [2018-10-03 08:57:12,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:12,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:12,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:12,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:12,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:12,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:12,506 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 [2018-10-03 08:57:12,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:12,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:12,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:12,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:12,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:12,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 08:57:12,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:57:12,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:57:12,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:57:12,577 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2018-10-03 08:57:12,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:12,704 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-10-03 08:57:12,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:57:12,705 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-03 08:57:12,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:12,705 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:57:12,706 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:57:12,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:57:12,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:57:12,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 08:57:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 08:57:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-03 08:57:12,709 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2018-10-03 08:57:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:12,710 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-03 08:57:12,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:57:12,710 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-03 08:57:12,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 08:57:12,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:12,710 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-10-03 08:57:12,711 INFO L423 AbstractCegarLoop]: === Iteration 42 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:12,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:12,711 INFO L82 PathProgramCache]: Analyzing trace with hash -188583289, now seen corresponding path program 39 times [2018-10-03 08:57:12,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:12,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:12,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:12,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:12,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:12,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:12,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:12,989 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:13,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:57:13,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:13,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:13,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:13,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 08:57:13,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:57:13,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:57:13,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:57:13,043 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-10-03 08:57:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:13,169 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-03 08:57:13,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:57:13,169 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-03 08:57:13,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:13,170 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:57:13,170 INFO L226 Difference]: Without dead ends: 34 [2018-10-03 08:57:13,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:57:13,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-03 08:57:13,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-03 08:57:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:13,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-10-03 08:57:13,173 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2018-10-03 08:57:13,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:13,174 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-10-03 08:57:13,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:57:13,174 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-10-03 08:57:13,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-03 08:57:13,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:13,174 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2018-10-03 08:57:13,174 INFO L423 AbstractCegarLoop]: === Iteration 43 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:13,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:13,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1551176185, now seen corresponding path program 40 times [2018-10-03 08:57:13,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:13,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:13,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:13,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:13,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:13,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:13,479 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 [2018-10-03 08:57:13,486 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:13,506 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:13,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:13,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:13,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:13,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 08:57:13,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:57:13,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:57:13,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:57:13,535 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 17 states. [2018-10-03 08:57:13,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:13,838 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-10-03 08:57:13,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:57:13,839 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2018-10-03 08:57:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:13,839 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:57:13,839 INFO L226 Difference]: Without dead ends: 50 [2018-10-03 08:57:13,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:57:13,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-03 08:57:13,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2018-10-03 08:57:13,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-03 08:57:13,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-10-03 08:57:13,843 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2018-10-03 08:57:13,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:13,844 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-10-03 08:57:13,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:57:13,844 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-10-03 08:57:13,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:57:13,844 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:13,844 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-10-03 08:57:13,844 INFO L423 AbstractCegarLoop]: === Iteration 44 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:13,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:13,845 INFO L82 PathProgramCache]: Analyzing trace with hash -841883001, now seen corresponding path program 41 times [2018-10-03 08:57:13,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:13,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:13,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:13,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:13,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:14,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:14,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:14,068 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:14,096 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:57:14,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:14,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:14,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:14,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 08:57:14,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:57:14,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:57:14,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:57:14,128 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 18 states. [2018-10-03 08:57:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:14,229 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-10-03 08:57:14,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:57:14,230 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-03 08:57:14,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:14,232 INFO L225 Difference]: With dead ends: 54 [2018-10-03 08:57:14,232 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:57:14,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:57:14,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:57:14,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 08:57:14,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:57:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-03 08:57:14,236 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 34 [2018-10-03 08:57:14,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:14,236 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-03 08:57:14,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:57:14,236 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-03 08:57:14,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:57:14,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:14,237 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-10-03 08:57:14,237 INFO L423 AbstractCegarLoop]: === Iteration 45 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:14,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:14,238 INFO L82 PathProgramCache]: Analyzing trace with hash -995960403, now seen corresponding path program 42 times [2018-10-03 08:57:14,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:14,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:14,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:14,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:14,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:14,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:14,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:14,572 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:14,598 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:57:14,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:14,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:14,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:14,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 08:57:14,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:57:14,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:57:14,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:57:14,633 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-10-03 08:57:14,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:14,707 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-10-03 08:57:14,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:57:14,708 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-03 08:57:14,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:14,708 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:57:14,708 INFO L226 Difference]: Without dead ends: 36 [2018-10-03 08:57:14,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:57:14,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-03 08:57:14,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-03 08:57:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-03 08:57:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-03 08:57:14,726 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2018-10-03 08:57:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:14,727 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-03 08:57:14,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:57:14,727 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-03 08:57:14,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-03 08:57:14,727 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:14,727 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1] [2018-10-03 08:57:14,728 INFO L423 AbstractCegarLoop]: === Iteration 46 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:14,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:14,728 INFO L82 PathProgramCache]: Analyzing trace with hash -810062943, now seen corresponding path program 43 times [2018-10-03 08:57:14,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:14,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:14,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:14,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:14,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:15,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:15,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:15,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:15,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:15,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:15,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 08:57:15,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:57:15,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:57:15,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:57:15,117 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 18 states. [2018-10-03 08:57:15,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:15,544 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-03 08:57:15,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:57:15,544 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2018-10-03 08:57:15,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:15,545 INFO L225 Difference]: With dead ends: 56 [2018-10-03 08:57:15,545 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:57:15,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:57:15,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:57:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-10-03 08:57:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-03 08:57:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-03 08:57:15,549 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2018-10-03 08:57:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:15,549 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-03 08:57:15,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:57:15,550 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-03 08:57:15,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 08:57:15,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:15,550 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-10-03 08:57:15,550 INFO L423 AbstractCegarLoop]: === Iteration 47 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:15,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:15,551 INFO L82 PathProgramCache]: Analyzing trace with hash 657791021, now seen corresponding path program 44 times [2018-10-03 08:57:15,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:15,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:15,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:15,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:15,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:15,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:15,692 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 [2018-10-03 08:57:15,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:15,720 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:15,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:15,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:15,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:15,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 08:57:15,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:57:15,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:57:15,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:57:15,761 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 19 states. [2018-10-03 08:57:15,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:15,847 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-10-03 08:57:15,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:57:15,847 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-03 08:57:15,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:15,848 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:57:15,848 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:57:15,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:57:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:57:15,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 08:57:15,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 08:57:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-03 08:57:15,852 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2018-10-03 08:57:15,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:15,852 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-03 08:57:15,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:57:15,852 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-03 08:57:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 08:57:15,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:15,853 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-10-03 08:57:15,853 INFO L423 AbstractCegarLoop]: === Iteration 48 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:15,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:15,853 INFO L82 PathProgramCache]: Analyzing trace with hash 176358855, now seen corresponding path program 45 times [2018-10-03 08:57:15,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:15,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:15,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:15,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:15,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:16,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:16,124 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 [2018-10-03 08:57:16,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:16,156 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:57:16,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:16,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:16,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:16,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 08:57:16,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:57:16,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:57:16,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:57:16,188 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2018-10-03 08:57:16,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:16,254 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-03 08:57:16,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:57:16,254 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-03 08:57:16,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:16,255 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:57:16,255 INFO L226 Difference]: Without dead ends: 38 [2018-10-03 08:57:16,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:57:16,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-03 08:57:16,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-03 08:57:16,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-03 08:57:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-10-03 08:57:16,259 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2018-10-03 08:57:16,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:16,260 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-10-03 08:57:16,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:57:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-10-03 08:57:16,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-03 08:57:16,260 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:16,260 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1] [2018-10-03 08:57:16,261 INFO L423 AbstractCegarLoop]: === Iteration 49 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:16,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:16,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1172095687, now seen corresponding path program 46 times [2018-10-03 08:57:16,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:16,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:16,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:16,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:16,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:16,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:16,650 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 [2018-10-03 08:57:16,658 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:16,678 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:16,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:16,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:16,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:16,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 08:57:16,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:57:16,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:57:16,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:57:16,709 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 19 states. [2018-10-03 08:57:17,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:17,395 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-10-03 08:57:17,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:57:17,395 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2018-10-03 08:57:17,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:17,396 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:57:17,396 INFO L226 Difference]: Without dead ends: 56 [2018-10-03 08:57:17,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:57:17,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-03 08:57:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-10-03 08:57:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-03 08:57:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-03 08:57:17,400 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2018-10-03 08:57:17,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:17,401 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-03 08:57:17,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:57:17,401 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-03 08:57:17,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:57:17,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:17,401 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-10-03 08:57:17,402 INFO L423 AbstractCegarLoop]: === Iteration 50 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:17,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:17,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1975166407, now seen corresponding path program 47 times [2018-10-03 08:57:17,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:17,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:17,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:17,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:17,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:18,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:18,157 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 [2018-10-03 08:57:18,164 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:18,195 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-03 08:57:18,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:18,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:18,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:18,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 08:57:18,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:57:18,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:57:18,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:57:18,240 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2018-10-03 08:57:18,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:18,807 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-10-03 08:57:18,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:57:18,807 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-03 08:57:18,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:18,808 INFO L225 Difference]: With dead ends: 60 [2018-10-03 08:57:18,808 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:57:18,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:57:18,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:57:18,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 08:57:18,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:57:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-03 08:57:18,811 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2018-10-03 08:57:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:18,811 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-03 08:57:18,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:57:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-03 08:57:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:57:18,811 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:18,812 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-10-03 08:57:18,812 INFO L423 AbstractCegarLoop]: === Iteration 51 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:18,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:18,812 INFO L82 PathProgramCache]: Analyzing trace with hash -64328851, now seen corresponding path program 48 times [2018-10-03 08:57:18,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:18,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:18,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:18,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:18,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:19,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:19,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:19,140 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:19,166 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-03 08:57:19,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:19,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:19,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:19,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 08:57:19,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:57:19,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:57:19,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:57:19,196 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-10-03 08:57:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:19,259 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-03 08:57:19,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:57:19,259 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-03 08:57:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:19,260 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:57:19,261 INFO L226 Difference]: Without dead ends: 40 [2018-10-03 08:57:19,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:57:19,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-03 08:57:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-03 08:57:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-03 08:57:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-10-03 08:57:19,264 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2018-10-03 08:57:19,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:19,265 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-10-03 08:57:19,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:57:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-10-03 08:57:19,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-03 08:57:19,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:19,265 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1] [2018-10-03 08:57:19,266 INFO L423 AbstractCegarLoop]: === Iteration 52 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:19,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:19,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1994255903, now seen corresponding path program 49 times [2018-10-03 08:57:19,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:19,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:19,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:19,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:19,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:19,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:19,851 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 [2018-10-03 08:57:19,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:19,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:19,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:19,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 08:57:19,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:57:19,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:57:19,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:57:19,913 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 20 states. [2018-10-03 08:57:20,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:20,344 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-03 08:57:20,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:57:20,344 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2018-10-03 08:57:20,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:20,345 INFO L225 Difference]: With dead ends: 62 [2018-10-03 08:57:20,345 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:57:20,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:57:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:57:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-10-03 08:57:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-03 08:57:20,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-03 08:57:20,349 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2018-10-03 08:57:20,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:20,349 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-03 08:57:20,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:57:20,350 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-03 08:57:20,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 08:57:20,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:20,350 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-10-03 08:57:20,350 INFO L423 AbstractCegarLoop]: === Iteration 53 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:20,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:20,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1692452371, now seen corresponding path program 50 times [2018-10-03 08:57:20,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:20,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:20,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:20,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:20,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:20,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:20,846 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 [2018-10-03 08:57:20,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:20,880 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:20,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:20,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:20,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:20,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 08:57:20,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:57:20,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:57:20,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:57:20,920 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2018-10-03 08:57:21,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:21,031 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-10-03 08:57:21,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:57:21,032 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-03 08:57:21,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:21,033 INFO L225 Difference]: With dead ends: 63 [2018-10-03 08:57:21,033 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:57:21,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:57:21,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:57:21,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 08:57:21,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 08:57:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-03 08:57:21,038 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 40 [2018-10-03 08:57:21,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:21,038 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-03 08:57:21,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:57:21,038 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-03 08:57:21,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 08:57:21,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:21,039 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-10-03 08:57:21,039 INFO L423 AbstractCegarLoop]: === Iteration 54 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:21,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:21,040 INFO L82 PathProgramCache]: Analyzing trace with hash -492295929, now seen corresponding path program 51 times [2018-10-03 08:57:21,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:21,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:21,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:21,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:21,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:21,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:21,351 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 [2018-10-03 08:57:21,363 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:21,426 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-03 08:57:21,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:21,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:21,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:21,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 08:57:21,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:57:21,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:57:21,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:57:21,460 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2018-10-03 08:57:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:21,527 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-03 08:57:21,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:57:21,528 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-03 08:57:21,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:21,528 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:57:21,528 INFO L226 Difference]: Without dead ends: 42 [2018-10-03 08:57:21,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:57:21,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-03 08:57:21,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-03 08:57:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-03 08:57:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-03 08:57:21,534 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-10-03 08:57:21,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:21,534 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-03 08:57:21,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:57:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-03 08:57:21,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-03 08:57:21,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:21,535 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1] [2018-10-03 08:57:21,535 INFO L423 AbstractCegarLoop]: === Iteration 55 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:21,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:21,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1918633863, now seen corresponding path program 52 times [2018-10-03 08:57:21,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:21,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:21,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:21,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:21,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:21,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:21,860 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 [2018-10-03 08:57:21,873 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:21,896 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:21,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:21,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:21,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:21,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 08:57:21,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:57:21,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:57:21,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:57:21,963 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-10-03 08:57:22,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:22,437 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-10-03 08:57:22,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:57:22,437 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-10-03 08:57:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:22,438 INFO L225 Difference]: With dead ends: 65 [2018-10-03 08:57:22,438 INFO L226 Difference]: Without dead ends: 62 [2018-10-03 08:57:22,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:57:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-03 08:57:22,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2018-10-03 08:57:22,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-03 08:57:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-10-03 08:57:22,442 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2018-10-03 08:57:22,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:22,443 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-10-03 08:57:22,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:57:22,443 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-10-03 08:57:22,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:57:22,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:22,443 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-10-03 08:57:22,443 INFO L423 AbstractCegarLoop]: === Iteration 56 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:22,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:22,444 INFO L82 PathProgramCache]: Analyzing trace with hash -651953913, now seen corresponding path program 53 times [2018-10-03 08:57:22,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:22,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:22,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:22,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:22,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:23,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:23,080 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 [2018-10-03 08:57:23,090 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:23,121 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-10-03 08:57:23,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:23,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:23,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:23,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 08:57:23,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:57:23,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:57:23,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:57:23,152 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 22 states. [2018-10-03 08:57:23,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:23,267 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-10-03 08:57:23,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:57:23,268 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-03 08:57:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:23,269 INFO L225 Difference]: With dead ends: 66 [2018-10-03 08:57:23,269 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:57:23,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:57:23,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:57:23,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 08:57:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 08:57:23,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-03 08:57:23,272 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 42 [2018-10-03 08:57:23,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:23,272 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-03 08:57:23,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:57:23,272 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-03 08:57:23,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:57:23,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:23,273 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-10-03 08:57:23,273 INFO L423 AbstractCegarLoop]: === Iteration 57 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:23,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:23,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2101809875, now seen corresponding path program 54 times [2018-10-03 08:57:23,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:23,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:23,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:23,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:23,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:23,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:23,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:23,520 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:23,550 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-03 08:57:23,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:23,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:23,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:23,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 08:57:23,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:57:23,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:57:23,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:57:23,586 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-10-03 08:57:23,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:23,650 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-10-03 08:57:23,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:57:23,651 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-03 08:57:23,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:23,651 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:57:23,652 INFO L226 Difference]: Without dead ends: 44 [2018-10-03 08:57:23,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:57:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-03 08:57:23,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-03 08:57:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-03 08:57:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-10-03 08:57:23,655 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-10-03 08:57:23,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:23,656 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-10-03 08:57:23,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:57:23,656 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-10-03 08:57:23,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-03 08:57:23,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:23,656 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1] [2018-10-03 08:57:23,656 INFO L423 AbstractCegarLoop]: === Iteration 58 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:23,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:23,657 INFO L82 PathProgramCache]: Analyzing trace with hash -731658207, now seen corresponding path program 55 times [2018-10-03 08:57:23,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:23,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:23,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:23,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:23,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:23,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:23,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:23,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:24,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:24,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:24,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 08:57:24,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:57:24,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:57:24,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:57:24,042 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 22 states. [2018-10-03 08:57:24,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:24,655 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-03 08:57:24,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:57:24,655 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2018-10-03 08:57:24,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:24,655 INFO L225 Difference]: With dead ends: 68 [2018-10-03 08:57:24,656 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 08:57:24,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:57:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 08:57:24,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2018-10-03 08:57:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-03 08:57:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-03 08:57:24,659 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2018-10-03 08:57:24,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:24,660 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-03 08:57:24,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:57:24,660 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-03 08:57:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 08:57:24,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:24,660 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-10-03 08:57:24,660 INFO L423 AbstractCegarLoop]: === Iteration 59 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:24,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:24,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1206629459, now seen corresponding path program 56 times [2018-10-03 08:57:24,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:24,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:24,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:24,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:24,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:25,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:25,508 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 [2018-10-03 08:57:25,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:25,541 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:25,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:25,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:25,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:25,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 08:57:25,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:57:25,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:57:25,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:57:25,573 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 23 states. [2018-10-03 08:57:25,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:25,715 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-10-03 08:57:25,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:57:25,715 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-03 08:57:25,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:25,716 INFO L225 Difference]: With dead ends: 69 [2018-10-03 08:57:25,716 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:57:25,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:57:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:57:25,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 08:57:25,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 08:57:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-03 08:57:25,720 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2018-10-03 08:57:25,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:25,720 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-03 08:57:25,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:57:25,720 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-03 08:57:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 08:57:25,720 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:25,721 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-10-03 08:57:25,721 INFO L423 AbstractCegarLoop]: === Iteration 60 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:25,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:25,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1092475975, now seen corresponding path program 57 times [2018-10-03 08:57:25,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:25,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:25,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:25,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:25,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:25,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:25,971 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 [2018-10-03 08:57:25,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:26,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-03 08:57:26,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:26,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:26,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:26,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 08:57:26,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:57:26,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:57:26,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:57:26,044 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 23 states. [2018-10-03 08:57:26,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:26,109 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-03 08:57:26,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:57:26,110 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-03 08:57:26,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:26,110 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:57:26,111 INFO L226 Difference]: Without dead ends: 46 [2018-10-03 08:57:26,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:57:26,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-03 08:57:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-03 08:57:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-03 08:57:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-03 08:57:26,115 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-10-03 08:57:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:26,115 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-03 08:57:26,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:57:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-03 08:57:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-03 08:57:26,116 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:26,116 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1] [2018-10-03 08:57:26,116 INFO L423 AbstractCegarLoop]: === Iteration 61 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:26,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:26,117 INFO L82 PathProgramCache]: Analyzing trace with hash -493044665, now seen corresponding path program 58 times [2018-10-03 08:57:26,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:26,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:26,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:26,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:26,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:26,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:26,520 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) [2018-10-03 08:57:26,537 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:26,572 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:26,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:26,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:26,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:26,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 08:57:26,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:57:26,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:57:26,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:57:26,608 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 23 states. [2018-10-03 08:57:27,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:27,212 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-10-03 08:57:27,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:57:27,213 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2018-10-03 08:57:27,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:27,214 INFO L225 Difference]: With dead ends: 71 [2018-10-03 08:57:27,214 INFO L226 Difference]: Without dead ends: 68 [2018-10-03 08:57:27,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:57:27,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-03 08:57:27,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2018-10-03 08:57:27,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-03 08:57:27,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-10-03 08:57:27,218 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2018-10-03 08:57:27,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:27,219 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-10-03 08:57:27,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:57:27,219 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-10-03 08:57:27,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 08:57:27,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:27,219 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-10-03 08:57:27,220 INFO L423 AbstractCegarLoop]: === Iteration 62 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:27,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:27,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1895423047, now seen corresponding path program 59 times [2018-10-03 08:57:27,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:27,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:27,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:27,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:27,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:27,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:27,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:27,993 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:28,042 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-03 08:57:28,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:28,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:28,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:28,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 08:57:28,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:57:28,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:57:28,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:57:28,074 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2018-10-03 08:57:28,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:28,192 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-10-03 08:57:28,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:57:28,193 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-03 08:57:28,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:28,193 INFO L225 Difference]: With dead ends: 72 [2018-10-03 08:57:28,194 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:57:28,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:57:28,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:57:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-03 08:57:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 08:57:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-03 08:57:28,198 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 46 [2018-10-03 08:57:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:28,198 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-03 08:57:28,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:57:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-03 08:57:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 08:57:28,199 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:28,199 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-10-03 08:57:28,199 INFO L423 AbstractCegarLoop]: === Iteration 63 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:28,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:28,200 INFO L82 PathProgramCache]: Analyzing trace with hash 153247469, now seen corresponding path program 60 times [2018-10-03 08:57:28,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:28,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:28,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:28,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:28,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:28,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:28,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:28,671 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:28,703 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-03 08:57:28,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:28,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:28,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:28,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 08:57:28,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:57:28,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:57:28,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:57:28,736 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-10-03 08:57:28,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:28,799 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-10-03 08:57:28,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:57:28,799 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-03 08:57:28,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:28,800 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:57:28,800 INFO L226 Difference]: Without dead ends: 48 [2018-10-03 08:57:28,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:57:28,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-03 08:57:28,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-03 08:57:28,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-03 08:57:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-03 08:57:28,805 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2018-10-03 08:57:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:28,805 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-03 08:57:28,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:57:28,805 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-03 08:57:28,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-03 08:57:28,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:28,805 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1] [2018-10-03 08:57:28,806 INFO L423 AbstractCegarLoop]: === Iteration 64 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:28,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:28,806 INFO L82 PathProgramCache]: Analyzing trace with hash 455642721, now seen corresponding path program 61 times [2018-10-03 08:57:28,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:28,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:28,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:28,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:28,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:29,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:29,168 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 [2018-10-03 08:57:29,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:29,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:29,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:29,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 08:57:29,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:57:29,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:57:29,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:57:29,233 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 24 states. [2018-10-03 08:57:30,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:30,064 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-03 08:57:30,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:57:30,064 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2018-10-03 08:57:30,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:30,065 INFO L225 Difference]: With dead ends: 74 [2018-10-03 08:57:30,065 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 08:57:30,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:57:30,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 08:57:30,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-10-03 08:57:30,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-03 08:57:30,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-03 08:57:30,071 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-10-03 08:57:30,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:30,071 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-03 08:57:30,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:57:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-03 08:57:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 08:57:30,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:30,072 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-10-03 08:57:30,072 INFO L423 AbstractCegarLoop]: === Iteration 65 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:30,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:30,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1239960941, now seen corresponding path program 62 times [2018-10-03 08:57:30,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:30,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:30,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:30,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:30,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:30,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:30,544 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 [2018-10-03 08:57:30,552 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:30,581 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:30,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:30,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:30,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:30,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 08:57:30,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:57:30,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:57:30,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:57:30,625 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2018-10-03 08:57:30,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:30,749 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-10-03 08:57:30,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:57:30,750 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-03 08:57:30,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:30,750 INFO L225 Difference]: With dead ends: 75 [2018-10-03 08:57:30,751 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:57:30,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:57:30,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:57:30,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 08:57:30,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 08:57:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-03 08:57:30,754 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 48 [2018-10-03 08:57:30,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:30,754 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-03 08:57:30,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:57:30,755 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-03 08:57:30,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 08:57:30,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:30,755 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-10-03 08:57:30,755 INFO L423 AbstractCegarLoop]: === Iteration 66 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:30,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:30,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1227874425, now seen corresponding path program 63 times [2018-10-03 08:57:30,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:30,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:30,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:30,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:30,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:31,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:31,453 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 [2018-10-03 08:57:31,460 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:31,492 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-03 08:57:31,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:31,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:31,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:31,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 08:57:31,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:57:31,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:57:31,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:57:31,533 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 25 states. [2018-10-03 08:57:31,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:31,607 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-03 08:57:31,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:57:31,607 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-03 08:57:31,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:31,608 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:57:31,608 INFO L226 Difference]: Without dead ends: 50 [2018-10-03 08:57:31,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:57:31,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-03 08:57:31,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-03 08:57:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-03 08:57:31,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-10-03 08:57:31,612 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2018-10-03 08:57:31,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:31,613 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-10-03 08:57:31,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:57:31,613 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-10-03 08:57:31,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-03 08:57:31,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:31,613 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2018-10-03 08:57:31,614 INFO L423 AbstractCegarLoop]: === Iteration 67 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:31,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:31,614 INFO L82 PathProgramCache]: Analyzing trace with hash 590536967, now seen corresponding path program 64 times [2018-10-03 08:57:31,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:31,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:31,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:31,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:31,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:32,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:32,314 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 [2018-10-03 08:57:32,321 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:32,349 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:32,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:32,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:32,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:32,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 08:57:32,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:57:32,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:57:32,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:57:32,382 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 25 states. [2018-10-03 08:57:33,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:33,053 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-10-03 08:57:33,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:57:33,053 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2018-10-03 08:57:33,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:33,054 INFO L225 Difference]: With dead ends: 77 [2018-10-03 08:57:33,054 INFO L226 Difference]: Without dead ends: 74 [2018-10-03 08:57:33,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:57:33,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-03 08:57:33,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2018-10-03 08:57:33,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-03 08:57:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-03 08:57:33,060 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2018-10-03 08:57:33,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:33,060 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-03 08:57:33,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:57:33,060 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-03 08:57:33,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 08:57:33,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:33,061 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-10-03 08:57:33,061 INFO L423 AbstractCegarLoop]: === Iteration 68 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:33,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:33,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1126715271, now seen corresponding path program 65 times [2018-10-03 08:57:33,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:33,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:33,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:33,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:33,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:33,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:33,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:33,293 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:33,327 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 08:57:33,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:33,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:33,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:33,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 08:57:33,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:57:33,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:57:33,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:57:33,359 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-03 08:57:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:33,513 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-10-03 08:57:33,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:57:33,513 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-03 08:57:33,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:33,514 INFO L225 Difference]: With dead ends: 78 [2018-10-03 08:57:33,514 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:57:33,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:57:33,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:57:33,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-03 08:57:33,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 08:57:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-03 08:57:33,517 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 50 [2018-10-03 08:57:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:33,518 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-03 08:57:33,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:57:33,518 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-03 08:57:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 08:57:33,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:33,518 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-10-03 08:57:33,518 INFO L423 AbstractCegarLoop]: === Iteration 69 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:33,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:33,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1933230253, now seen corresponding path program 66 times [2018-10-03 08:57:33,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:33,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:33,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:33,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:33,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:33,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:33,902 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 [2018-10-03 08:57:33,925 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:33,958 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 08:57:33,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:33,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:33,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:33,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 08:57:33,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:57:33,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:57:33,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:57:33,990 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-10-03 08:57:34,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:34,162 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-03 08:57:34,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:57:34,162 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-03 08:57:34,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:34,163 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:57:34,163 INFO L226 Difference]: Without dead ends: 52 [2018-10-03 08:57:34,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:57:34,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-03 08:57:34,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-03 08:57:34,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-03 08:57:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-10-03 08:57:34,167 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2018-10-03 08:57:34,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:34,168 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-10-03 08:57:34,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:57:34,168 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-10-03 08:57:34,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-03 08:57:34,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:34,168 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1] [2018-10-03 08:57:34,168 INFO L423 AbstractCegarLoop]: === Iteration 70 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:34,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:34,169 INFO L82 PathProgramCache]: Analyzing trace with hash -199465823, now seen corresponding path program 67 times [2018-10-03 08:57:34,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:34,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:34,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:34,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:34,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:34,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:34,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:34,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:34,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:34,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:34,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 08:57:34,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:57:34,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:57:34,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:57:34,891 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 26 states. [2018-10-03 08:57:35,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:35,732 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-03 08:57:35,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:57:35,733 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-03 08:57:35,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:35,734 INFO L225 Difference]: With dead ends: 80 [2018-10-03 08:57:35,734 INFO L226 Difference]: Without dead ends: 77 [2018-10-03 08:57:35,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:57:35,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-03 08:57:35,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2018-10-03 08:57:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-03 08:57:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-10-03 08:57:35,738 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2018-10-03 08:57:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:35,738 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-10-03 08:57:35,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:57:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-10-03 08:57:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 08:57:35,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:35,738 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-10-03 08:57:35,738 INFO L423 AbstractCegarLoop]: === Iteration 71 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:35,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:35,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1888534739, now seen corresponding path program 68 times [2018-10-03 08:57:35,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:35,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:35,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:35,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:35,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:36,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:36,139 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 [2018-10-03 08:57:36,146 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:36,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:36,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:36,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:36,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:36,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 08:57:36,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:57:36,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:57:36,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:57:36,207 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 27 states. [2018-10-03 08:57:36,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:36,423 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-10-03 08:57:36,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:57:36,424 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-03 08:57:36,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:36,424 INFO L225 Difference]: With dead ends: 81 [2018-10-03 08:57:36,425 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:57:36,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:57:36,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:57:36,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-03 08:57:36,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 08:57:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-03 08:57:36,429 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2018-10-03 08:57:36,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:36,429 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-03 08:57:36,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:57:36,429 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-03 08:57:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 08:57:36,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:36,430 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-10-03 08:57:36,430 INFO L423 AbstractCegarLoop]: === Iteration 72 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:36,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:36,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1638593223, now seen corresponding path program 69 times [2018-10-03 08:57:36,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:36,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:36,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:36,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:36,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:36,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:36,749 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 [2018-10-03 08:57:36,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:36,944 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-03 08:57:36,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:36,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:36,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:36,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 08:57:36,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:57:36,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:57:36,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:57:36,992 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 27 states. [2018-10-03 08:57:37,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:37,099 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-03 08:57:37,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:57:37,100 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-03 08:57:37,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:37,101 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:57:37,101 INFO L226 Difference]: Without dead ends: 54 [2018-10-03 08:57:37,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:57:37,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-03 08:57:37,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-03 08:57:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-03 08:57:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-03 08:57:37,104 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2018-10-03 08:57:37,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:37,104 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-03 08:57:37,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:57:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-03 08:57:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-03 08:57:37,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:37,105 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1] [2018-10-03 08:57:37,105 INFO L423 AbstractCegarLoop]: === Iteration 73 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:37,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:37,105 INFO L82 PathProgramCache]: Analyzing trace with hash -743279161, now seen corresponding path program 70 times [2018-10-03 08:57:37,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:37,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:37,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:37,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:37,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:37,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:37,480 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 [2018-10-03 08:57:37,488 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:37,519 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:37,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:37,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:37,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:37,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 08:57:37,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:57:37,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:57:37,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:57:37,607 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 27 states. [2018-10-03 08:57:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:38,578 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-10-03 08:57:38,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:57:38,578 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2018-10-03 08:57:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:38,579 INFO L225 Difference]: With dead ends: 83 [2018-10-03 08:57:38,579 INFO L226 Difference]: Without dead ends: 80 [2018-10-03 08:57:38,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:57:38,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-03 08:57:38,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-10-03 08:57:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-03 08:57:38,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-03 08:57:38,585 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-10-03 08:57:38,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:38,585 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-03 08:57:38,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:57:38,585 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-03 08:57:38,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 08:57:38,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:38,586 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-10-03 08:57:38,586 INFO L423 AbstractCegarLoop]: === Iteration 74 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:38,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:38,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1566879033, now seen corresponding path program 71 times [2018-10-03 08:57:38,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:38,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:38,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:38,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:38,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:40,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:40,779 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 [2018-10-03 08:57:40,786 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:40,823 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-03 08:57:40,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:40,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:40,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:40,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 08:57:40,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:57:40,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:57:40,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:57:40,858 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 28 states. [2018-10-03 08:57:41,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:41,064 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-10-03 08:57:41,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:57:41,064 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-03 08:57:41,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:41,065 INFO L225 Difference]: With dead ends: 84 [2018-10-03 08:57:41,065 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:57:41,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:57:41,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:57:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-03 08:57:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 08:57:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-03 08:57:41,069 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 54 [2018-10-03 08:57:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:41,069 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-03 08:57:41,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:57:41,069 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-03 08:57:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 08:57:41,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:41,070 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-10-03 08:57:41,070 INFO L423 AbstractCegarLoop]: === Iteration 75 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:41,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:41,070 INFO L82 PathProgramCache]: Analyzing trace with hash 399905389, now seen corresponding path program 72 times [2018-10-03 08:57:41,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:41,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:41,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:41,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:41,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:42,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:42,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:42,446 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:42,487 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-03 08:57:42,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:42,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:42,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:42,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 08:57:42,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:57:42,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:57:42,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:57:42,539 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-10-03 08:57:42,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:42,739 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-10-03 08:57:42,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:57:42,739 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-03 08:57:42,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:42,740 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:57:42,741 INFO L226 Difference]: Without dead ends: 56 [2018-10-03 08:57:42,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:57:42,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-03 08:57:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-03 08:57:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-03 08:57:42,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-10-03 08:57:42,744 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2018-10-03 08:57:42,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:42,745 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-10-03 08:57:42,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:57:42,745 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-10-03 08:57:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-03 08:57:42,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:42,745 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1] [2018-10-03 08:57:42,745 INFO L423 AbstractCegarLoop]: === Iteration 76 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:42,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:42,746 INFO L82 PathProgramCache]: Analyzing trace with hash -487896351, now seen corresponding path program 73 times [2018-10-03 08:57:42,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:42,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:42,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:42,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:42,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:43,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:43,188 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 [2018-10-03 08:57:43,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:43,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:43,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:43,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 08:57:43,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:57:43,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:57:43,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:57:43,268 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 28 states. [2018-10-03 08:57:44,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:44,113 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-03 08:57:44,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:57:44,113 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2018-10-03 08:57:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:44,114 INFO L225 Difference]: With dead ends: 86 [2018-10-03 08:57:44,114 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:57:44,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:57:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:57:44,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2018-10-03 08:57:44,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-03 08:57:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-10-03 08:57:44,120 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2018-10-03 08:57:44,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:44,120 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-10-03 08:57:44,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:57:44,121 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-10-03 08:57:44,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 08:57:44,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:44,121 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-10-03 08:57:44,121 INFO L423 AbstractCegarLoop]: === Iteration 77 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:44,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:44,122 INFO L82 PathProgramCache]: Analyzing trace with hash 2055020781, now seen corresponding path program 74 times [2018-10-03 08:57:44,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:44,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:44,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:44,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:44,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:44,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:44,445 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 [2018-10-03 08:57:44,452 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:44,486 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:44,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:44,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:44,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:44,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 08:57:44,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:57:44,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:57:44,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:57:44,535 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2018-10-03 08:57:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:45,475 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-10-03 08:57:45,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:57:45,476 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-03 08:57:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:45,477 INFO L225 Difference]: With dead ends: 87 [2018-10-03 08:57:45,477 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:57:45,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:57:45,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:57:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-03 08:57:45,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-03 08:57:45,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-03 08:57:45,483 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 56 [2018-10-03 08:57:45,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:45,483 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-03 08:57:45,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:57:45,483 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-03 08:57:45,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 08:57:45,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:45,484 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-10-03 08:57:45,484 INFO L423 AbstractCegarLoop]: === Iteration 78 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:45,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:45,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1399171577, now seen corresponding path program 75 times [2018-10-03 08:57:45,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:45,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:45,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:45,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:45,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:46,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:46,486 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 [2018-10-03 08:57:46,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:46,532 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-10-03 08:57:46,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:46,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:46,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:46,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 08:57:46,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:57:46,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:57:46,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:57:46,572 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 29 states. [2018-10-03 08:57:46,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:46,666 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-03 08:57:46,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:57:46,667 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-03 08:57:46,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:46,667 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:57:46,668 INFO L226 Difference]: Without dead ends: 58 [2018-10-03 08:57:46,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:57:46,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-03 08:57:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-03 08:57:46,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-03 08:57:46,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-10-03 08:57:46,671 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2018-10-03 08:57:46,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:46,672 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-10-03 08:57:46,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:57:46,672 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-10-03 08:57:46,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-03 08:57:46,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:46,672 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1] [2018-10-03 08:57:46,672 INFO L423 AbstractCegarLoop]: === Iteration 79 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:46,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:46,673 INFO L82 PathProgramCache]: Analyzing trace with hash -424707449, now seen corresponding path program 76 times [2018-10-03 08:57:46,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:46,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:46,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:46,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:46,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:47,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:47,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:47,263 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:47,304 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:47,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:47,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:47,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:47,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 08:57:47,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:57:47,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:57:47,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:57:47,397 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 29 states. [2018-10-03 08:57:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:48,401 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-10-03 08:57:48,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:57:48,401 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-10-03 08:57:48,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:48,402 INFO L225 Difference]: With dead ends: 89 [2018-10-03 08:57:48,402 INFO L226 Difference]: Without dead ends: 86 [2018-10-03 08:57:48,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:57:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-03 08:57:48,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2018-10-03 08:57:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-03 08:57:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-10-03 08:57:48,409 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2018-10-03 08:57:48,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:48,409 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-10-03 08:57:48,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:57:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-10-03 08:57:48,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:57:48,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:48,410 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-10-03 08:57:48,410 INFO L423 AbstractCegarLoop]: === Iteration 80 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:48,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:48,410 INFO L82 PathProgramCache]: Analyzing trace with hash -281090553, now seen corresponding path program 77 times [2018-10-03 08:57:48,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:48,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:48,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:48,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:48,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:49,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:49,630 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 [2018-10-03 08:57:49,637 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:49,677 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-10-03 08:57:49,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:49,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:49,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:49,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 08:57:49,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:57:49,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:57:49,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:57:49,712 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 30 states. [2018-10-03 08:57:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:49,912 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-10-03 08:57:49,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:57:49,913 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-03 08:57:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:49,914 INFO L225 Difference]: With dead ends: 90 [2018-10-03 08:57:49,914 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:57:49,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:57:49,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:57:49,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-03 08:57:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 08:57:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-03 08:57:49,921 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 58 [2018-10-03 08:57:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:49,921 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-03 08:57:49,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:57:49,922 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-03 08:57:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:57:49,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:49,922 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-10-03 08:57:49,923 INFO L423 AbstractCegarLoop]: === Iteration 81 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:49,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:49,923 INFO L82 PathProgramCache]: Analyzing trace with hash 13128749, now seen corresponding path program 78 times [2018-10-03 08:57:49,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:49,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:49,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:49,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:49,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:50,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:50,654 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 [2018-10-03 08:57:50,662 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:50,711 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-03 08:57:50,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:50,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:50,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:50,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 08:57:50,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:57:50,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:57:50,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:57:50,745 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-10-03 08:57:50,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:50,845 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-10-03 08:57:50,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:57:50,845 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-03 08:57:50,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:50,846 INFO L225 Difference]: With dead ends: 63 [2018-10-03 08:57:50,846 INFO L226 Difference]: Without dead ends: 60 [2018-10-03 08:57:50,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:57:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-03 08:57:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-03 08:57:50,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-03 08:57:50,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-03 08:57:50,852 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2018-10-03 08:57:50,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:50,852 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-03 08:57:50,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:57:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-03 08:57:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-03 08:57:50,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:50,853 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1] [2018-10-03 08:57:50,853 INFO L423 AbstractCegarLoop]: === Iteration 82 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:50,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:50,853 INFO L82 PathProgramCache]: Analyzing trace with hash 406929697, now seen corresponding path program 79 times [2018-10-03 08:57:50,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:50,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:50,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:50,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:50,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:51,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:51,535 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 [2018-10-03 08:57:51,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:51,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:51,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:51,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 08:57:51,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:57:51,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:57:51,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:57:51,611 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 30 states. [2018-10-03 08:57:52,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:52,681 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-03 08:57:52,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:57:52,682 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2018-10-03 08:57:52,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:52,682 INFO L225 Difference]: With dead ends: 92 [2018-10-03 08:57:52,683 INFO L226 Difference]: Without dead ends: 89 [2018-10-03 08:57:52,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:57:52,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-03 08:57:52,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-10-03 08:57:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-03 08:57:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-10-03 08:57:52,687 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2018-10-03 08:57:52,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:52,687 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-10-03 08:57:52,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:57:52,687 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-10-03 08:57:52,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 08:57:52,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:52,688 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-10-03 08:57:52,688 INFO L423 AbstractCegarLoop]: === Iteration 83 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:52,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:52,688 INFO L82 PathProgramCache]: Analyzing trace with hash -270142803, now seen corresponding path program 80 times [2018-10-03 08:57:52,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:52,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:52,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:52,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:52,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:53,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:53,043 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 [2018-10-03 08:57:53,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:53,084 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:53,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:53,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:53,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:53,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 08:57:53,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:57:53,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:57:53,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:57:53,117 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 31 states. [2018-10-03 08:57:53,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:53,363 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-10-03 08:57:53,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:57:53,364 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-03 08:57:53,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:53,365 INFO L225 Difference]: With dead ends: 93 [2018-10-03 08:57:53,365 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 08:57:53,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:57:53,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 08:57:53,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 08:57:53,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 08:57:53,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-03 08:57:53,370 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2018-10-03 08:57:53,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:53,370 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-03 08:57:53,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:57:53,370 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-03 08:57:53,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 08:57:53,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:53,371 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-10-03 08:57:53,371 INFO L423 AbstractCegarLoop]: === Iteration 84 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:53,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:53,371 INFO L82 PathProgramCache]: Analyzing trace with hash 260720967, now seen corresponding path program 81 times [2018-10-03 08:57:53,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:53,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:53,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:53,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:53,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:54,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:54,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:54,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:54,110 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 08:57:54,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:54,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:54,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:54,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 08:57:54,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:57:54,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:57:54,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:57:54,158 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 31 states. [2018-10-03 08:57:54,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:54,253 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-03 08:57:54,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:57:54,254 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-03 08:57:54,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:54,254 INFO L225 Difference]: With dead ends: 65 [2018-10-03 08:57:54,255 INFO L226 Difference]: Without dead ends: 62 [2018-10-03 08:57:54,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:57:54,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-03 08:57:54,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-03 08:57:54,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-03 08:57:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-10-03 08:57:54,260 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2018-10-03 08:57:54,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:54,260 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-10-03 08:57:54,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:57:54,260 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-10-03 08:57:54,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-03 08:57:54,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:54,261 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1] [2018-10-03 08:57:54,261 INFO L423 AbstractCegarLoop]: === Iteration 85 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:54,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:54,262 INFO L82 PathProgramCache]: Analyzing trace with hash -507646137, now seen corresponding path program 82 times [2018-10-03 08:57:54,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:54,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:54,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:54,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:54,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:55,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:55,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:55,126 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:55,167 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:55,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:55,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:55,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:55,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 08:57:55,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:57:55,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:57:55,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:57:55,250 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 31 states. [2018-10-03 08:57:56,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:56,435 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2018-10-03 08:57:56,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:57:56,435 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2018-10-03 08:57:56,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:56,436 INFO L225 Difference]: With dead ends: 95 [2018-10-03 08:57:56,437 INFO L226 Difference]: Without dead ends: 92 [2018-10-03 08:57:56,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:57:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-03 08:57:56,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2018-10-03 08:57:56,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-03 08:57:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-10-03 08:57:56,446 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2018-10-03 08:57:56,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:56,446 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-10-03 08:57:56,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:57:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-10-03 08:57:56,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:57:56,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:56,447 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-10-03 08:57:56,449 INFO L423 AbstractCegarLoop]: === Iteration 86 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:56,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:56,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1442777415, now seen corresponding path program 83 times [2018-10-03 08:57:56,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:56,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:56,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:56,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:56,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:57,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:57,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:57,474 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:57,522 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-03 08:57:57,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:57,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:57,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:57,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 08:57:57,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:57:57,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:57:57,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:57:57,574 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2018-10-03 08:57:57,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:57,891 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-10-03 08:57:57,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:57:57,891 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-03 08:57:57,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:57,892 INFO L225 Difference]: With dead ends: 96 [2018-10-03 08:57:57,892 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 08:57:57,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:57:57,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 08:57:57,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-03 08:57:57,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 08:57:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-03 08:57:57,896 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 62 [2018-10-03 08:57:57,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:57,896 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-03 08:57:57,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:57:57,896 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-03 08:57:57,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:57:57,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:57,897 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-10-03 08:57:57,897 INFO L423 AbstractCegarLoop]: === Iteration 87 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:57,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:57,897 INFO L82 PathProgramCache]: Analyzing trace with hash 719685101, now seen corresponding path program 84 times [2018-10-03 08:57:57,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:57,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:57,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:57,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:57,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:58,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:58,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:58,471 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:58,514 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-03 08:57:58,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:58,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:58,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:58,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 08:57:58,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:57:58,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:57:58,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:57:58,547 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-10-03 08:57:58,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:58,646 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-03 08:57:58,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:57:58,646 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-03 08:57:58,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:58,647 INFO L225 Difference]: With dead ends: 67 [2018-10-03 08:57:58,647 INFO L226 Difference]: Without dead ends: 64 [2018-10-03 08:57:58,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:57:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-03 08:57:58,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-03 08:57:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-03 08:57:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-10-03 08:57:58,652 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2018-10-03 08:57:58,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:58,652 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-10-03 08:57:58,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:57:58,653 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-10-03 08:57:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-03 08:57:58,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:58,653 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1] [2018-10-03 08:57:58,653 INFO L423 AbstractCegarLoop]: === Iteration 88 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:58,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:58,653 INFO L82 PathProgramCache]: Analyzing trace with hash 835340129, now seen corresponding path program 85 times [2018-10-03 08:57:58,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:58,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:58,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:58,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:58,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:59,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:59,239 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 [2018-10-03 08:57:59,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:59,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:59,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:59,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 08:57:59,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:57:59,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:57:59,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:57:59,370 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 32 states. [2018-10-03 08:58:00,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:00,661 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-03 08:58:00,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:58:00,661 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2018-10-03 08:58:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:00,662 INFO L225 Difference]: With dead ends: 98 [2018-10-03 08:58:00,662 INFO L226 Difference]: Without dead ends: 95 [2018-10-03 08:58:00,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:58:00,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-03 08:58:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2018-10-03 08:58:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-03 08:58:00,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-03 08:58:00,667 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2018-10-03 08:58:00,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:00,667 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-03 08:58:00,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:58:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-03 08:58:00,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 08:58:00,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:00,668 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-10-03 08:58:00,668 INFO L423 AbstractCegarLoop]: === Iteration 89 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:00,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:00,669 INFO L82 PathProgramCache]: Analyzing trace with hash 125678701, now seen corresponding path program 86 times [2018-10-03 08:58:00,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:00,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:00,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:00,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:00,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:01,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:01,122 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 [2018-10-03 08:58:01,135 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:58:01,183 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:58:01,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:01,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:01,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:01,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-03 08:58:01,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:58:01,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:58:01,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:58:01,233 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2018-10-03 08:58:01,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:01,553 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-10-03 08:58:01,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:58:01,554 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-03 08:58:01,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:01,555 INFO L225 Difference]: With dead ends: 99 [2018-10-03 08:58:01,555 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 08:58:01,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:58:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 08:58:01,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 08:58:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 08:58:01,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-03 08:58:01,560 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 64 [2018-10-03 08:58:01,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:01,561 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-03 08:58:01,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:58:01,561 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-03 08:58:01,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 08:58:01,561 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:01,561 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-10-03 08:58:01,561 INFO L423 AbstractCegarLoop]: === Iteration 90 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:01,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:01,561 INFO L82 PathProgramCache]: Analyzing trace with hash -815346553, now seen corresponding path program 87 times [2018-10-03 08:58:01,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:01,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:01,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:01,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:01,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:01,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:01,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:58:01,963 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:58:02,004 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-03 08:58:02,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:02,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:02,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:02,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-03 08:58:02,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:58:02,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:58:02,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:58:02,041 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 33 states. [2018-10-03 08:58:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:02,131 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-03 08:58:02,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:58:02,132 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-03 08:58:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:02,132 INFO L225 Difference]: With dead ends: 69 [2018-10-03 08:58:02,132 INFO L226 Difference]: Without dead ends: 66 [2018-10-03 08:58:02,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:58:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-03 08:58:02,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-03 08:58:02,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-03 08:58:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-03 08:58:02,137 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2018-10-03 08:58:02,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:02,137 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-03 08:58:02,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:58:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-03 08:58:02,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-03 08:58:02,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:02,138 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1] [2018-10-03 08:58:02,138 INFO L423 AbstractCegarLoop]: === Iteration 91 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:02,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:02,138 INFO L82 PathProgramCache]: Analyzing trace with hash 493999111, now seen corresponding path program 88 times [2018-10-03 08:58:02,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:02,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:02,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:02,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:02,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:02,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:02,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:58:02,713 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:58:02,757 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:58:02,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:02,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:02,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:02,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 08:58:02,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:58:02,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:58:02,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:58:02,823 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 33 states. [2018-10-03 08:58:03,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:03,995 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-10-03 08:58:03,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:58:03,996 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2018-10-03 08:58:03,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:03,997 INFO L225 Difference]: With dead ends: 101 [2018-10-03 08:58:03,997 INFO L226 Difference]: Without dead ends: 98 [2018-10-03 08:58:03,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:58:03,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-03 08:58:04,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2018-10-03 08:58:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-03 08:58:04,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-10-03 08:58:04,003 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-10-03 08:58:04,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:04,003 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-10-03 08:58:04,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:58:04,004 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-10-03 08:58:04,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 08:58:04,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:04,004 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-10-03 08:58:04,004 INFO L423 AbstractCegarLoop]: === Iteration 92 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:04,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:04,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1865958265, now seen corresponding path program 89 times [2018-10-03 08:58:04,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:04,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:04,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:04,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:04,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:04,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:04,396 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 [2018-10-03 08:58:04,403 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:58:04,449 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-10-03 08:58:04,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:04,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:04,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:04,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 08:58:04,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:58:04,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:58:04,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:58:04,503 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 34 states. [2018-10-03 08:58:04,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:04,870 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-10-03 08:58:04,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:58:04,870 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-03 08:58:04,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:04,871 INFO L225 Difference]: With dead ends: 102 [2018-10-03 08:58:04,871 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 08:58:04,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:58:04,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 08:58:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-03 08:58:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 08:58:04,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-03 08:58:04,878 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 66 [2018-10-03 08:58:04,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:04,878 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-03 08:58:04,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:58:04,878 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-03 08:58:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 08:58:04,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:04,879 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-10-03 08:58:04,879 INFO L423 AbstractCegarLoop]: === Iteration 93 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:04,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:04,879 INFO L82 PathProgramCache]: Analyzing trace with hash -972970067, now seen corresponding path program 90 times [2018-10-03 08:58:04,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:04,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:04,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:04,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:04,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:05,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:05,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:58:05,326 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:58:05,433 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-03 08:58:05,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:05,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:05,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:05,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 08:58:05,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:58:05,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:58:05,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:58:05,486 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-10-03 08:58:05,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:05,689 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-10-03 08:58:05,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:58:05,689 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-03 08:58:05,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:05,690 INFO L225 Difference]: With dead ends: 71 [2018-10-03 08:58:05,690 INFO L226 Difference]: Without dead ends: 68 [2018-10-03 08:58:05,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:58:05,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-03 08:58:05,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-03 08:58:05,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-03 08:58:05,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-10-03 08:58:05,693 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 66 [2018-10-03 08:58:05,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:05,694 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-10-03 08:58:05,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:58:05,694 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-10-03 08:58:05,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-03 08:58:05,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:05,694 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1] [2018-10-03 08:58:05,694 INFO L423 AbstractCegarLoop]: === Iteration 94 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:05,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:05,695 INFO L82 PathProgramCache]: Analyzing trace with hash -97362527, now seen corresponding path program 91 times [2018-10-03 08:58:05,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:05,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:05,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:05,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:05,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:06,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:06,276 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 [2018-10-03 08:58:06,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:06,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:06,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:06,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-03 08:58:06,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:58:06,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:58:06,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:58:06,428 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 34 states. [2018-10-03 08:58:07,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:07,922 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-03 08:58:07,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:58:07,922 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2018-10-03 08:58:07,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:07,923 INFO L225 Difference]: With dead ends: 104 [2018-10-03 08:58:07,923 INFO L226 Difference]: Without dead ends: 101 [2018-10-03 08:58:07,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:58:07,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-03 08:58:07,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2018-10-03 08:58:07,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-03 08:58:07,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-03 08:58:07,928 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2018-10-03 08:58:07,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:07,929 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-03 08:58:07,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:58:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-03 08:58:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 08:58:07,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:07,929 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-10-03 08:58:07,929 INFO L423 AbstractCegarLoop]: === Iteration 95 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:07,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:07,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1276667437, now seen corresponding path program 92 times [2018-10-03 08:58:07,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:07,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:07,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:07,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:07,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:08,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:08,337 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 [2018-10-03 08:58:08,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:58:08,385 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:58:08,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:08,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:08,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:08,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 08:58:08,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:58:08,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:58:08,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:58:08,435 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 35 states. [2018-10-03 08:58:09,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:09,864 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-10-03 08:58:09,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:58:09,865 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-03 08:58:09,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:09,866 INFO L225 Difference]: With dead ends: 105 [2018-10-03 08:58:09,866 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 08:58:09,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:58:09,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 08:58:09,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-03 08:58:09,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 08:58:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-03 08:58:09,873 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2018-10-03 08:58:09,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:09,873 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-03 08:58:09,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:58:09,873 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-03 08:58:09,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 08:58:09,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:09,874 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-10-03 08:58:09,874 INFO L423 AbstractCegarLoop]: === Iteration 96 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:09,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:09,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1105469497, now seen corresponding path program 93 times [2018-10-03 08:58:09,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:09,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:09,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:09,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:09,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:11,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:11,362 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 [2018-10-03 08:58:11,371 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:58:11,450 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-10-03 08:58:11,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:11,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:11,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:11,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 08:58:11,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:58:11,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:58:11,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:58:11,504 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 35 states. [2018-10-03 08:58:11,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:11,733 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-03 08:58:11,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:58:11,733 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-03 08:58:11,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:11,734 INFO L225 Difference]: With dead ends: 73 [2018-10-03 08:58:11,734 INFO L226 Difference]: Without dead ends: 70 [2018-10-03 08:58:11,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:58:11,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-03 08:58:11,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-03 08:58:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-03 08:58:11,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-03 08:58:11,739 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2018-10-03 08:58:11,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:11,740 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-03 08:58:11,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:58:11,740 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-03 08:58:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-03 08:58:11,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:11,740 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1] [2018-10-03 08:58:11,740 INFO L423 AbstractCegarLoop]: === Iteration 97 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:11,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash 90122439, now seen corresponding path program 94 times [2018-10-03 08:58:11,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:11,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:11,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:11,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:11,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:12,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:12,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:58:12,539 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:58:12,582 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:58:12,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:12,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:12,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:12,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 08:58:12,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:58:12,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:58:12,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:58:12,622 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 35 states. [2018-10-03 08:58:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:13,964 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-10-03 08:58:13,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:58:13,965 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2018-10-03 08:58:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:13,965 INFO L225 Difference]: With dead ends: 107 [2018-10-03 08:58:13,966 INFO L226 Difference]: Without dead ends: 104 [2018-10-03 08:58:13,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:58:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-03 08:58:13,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2018-10-03 08:58:13,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-03 08:58:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-10-03 08:58:13,971 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2018-10-03 08:58:13,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:13,972 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-10-03 08:58:13,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:58:13,972 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-10-03 08:58:13,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 08:58:13,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:13,972 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-10-03 08:58:13,973 INFO L423 AbstractCegarLoop]: === Iteration 98 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:13,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:13,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1501233209, now seen corresponding path program 95 times [2018-10-03 08:58:13,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:13,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:13,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:13,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:13,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:14,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:14,445 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 [2018-10-03 08:58:14,454 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:58:14,504 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-03 08:58:14,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:14,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:14,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:14,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 08:58:14,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:58:14,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:58:14,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:58:14,539 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 36 states. [2018-10-03 08:58:14,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:14,847 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-10-03 08:58:14,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:58:14,847 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-03 08:58:14,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:14,848 INFO L225 Difference]: With dead ends: 108 [2018-10-03 08:58:14,848 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 08:58:14,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:58:14,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 08:58:14,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-03 08:58:14,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 08:58:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-03 08:58:14,855 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 70 [2018-10-03 08:58:14,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:14,855 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-03 08:58:14,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:58:14,855 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-03 08:58:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 08:58:14,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:14,856 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-10-03 08:58:14,856 INFO L423 AbstractCegarLoop]: === Iteration 99 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:14,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:14,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1961933165, now seen corresponding path program 96 times [2018-10-03 08:58:14,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:14,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:14,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:14,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:14,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:15,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:15,331 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 [2018-10-03 08:58:15,338 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:58:15,383 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-10-03 08:58:15,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:15,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:15,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:15,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 08:58:15,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:58:15,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:58:15,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:58:15,416 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-10-03 08:58:15,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:15,563 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-10-03 08:58:15,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:58:15,563 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-03 08:58:15,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:15,564 INFO L225 Difference]: With dead ends: 75 [2018-10-03 08:58:15,564 INFO L226 Difference]: Without dead ends: 72 [2018-10-03 08:58:15,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:58:15,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-03 08:58:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-03 08:58:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-03 08:58:15,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-03 08:58:15,570 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2018-10-03 08:58:15,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:15,570 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-03 08:58:15,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:58:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-03 08:58:15,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-03 08:58:15,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:15,571 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1] [2018-10-03 08:58:15,571 INFO L423 AbstractCegarLoop]: === Iteration 100 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:15,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:15,571 INFO L82 PathProgramCache]: Analyzing trace with hash 690324449, now seen corresponding path program 97 times [2018-10-03 08:58:15,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:15,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:15,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:15,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:15,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:16,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:16,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:58:16,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:16,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:16,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:16,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 08:58:16,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:58:16,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:58:16,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:58:16,702 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 36 states. [2018-10-03 08:58:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:18,130 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-03 08:58:18,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:58:18,130 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2018-10-03 08:58:18,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:18,131 INFO L225 Difference]: With dead ends: 110 [2018-10-03 08:58:18,131 INFO L226 Difference]: Without dead ends: 107 [2018-10-03 08:58:18,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:58:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-03 08:58:18,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 74. [2018-10-03 08:58:18,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-03 08:58:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2018-10-03 08:58:18,137 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2018-10-03 08:58:18,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:18,137 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2018-10-03 08:58:18,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:58:18,137 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2018-10-03 08:58:18,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 08:58:18,138 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:18,138 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-10-03 08:58:18,138 INFO L423 AbstractCegarLoop]: === Iteration 101 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:18,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:18,138 INFO L82 PathProgramCache]: Analyzing trace with hash -74840083, now seen corresponding path program 98 times [2018-10-03 08:58:18,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:18,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:18,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:18,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:18,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:18,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:18,601 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 [2018-10-03 08:58:18,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:58:18,651 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:58:18,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:18,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:18,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:18,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 08:58:18,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:58:18,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:58:18,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:58:18,699 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2018-10-03 08:58:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:19,017 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-10-03 08:58:19,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:58:19,018 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-03 08:58:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:19,019 INFO L225 Difference]: With dead ends: 111 [2018-10-03 08:58:19,019 INFO L226 Difference]: Without dead ends: 73 [2018-10-03 08:58:19,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:58:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-03 08:58:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-03 08:58:19,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 08:58:19,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-03 08:58:19,024 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 72 [2018-10-03 08:58:19,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:19,024 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-03 08:58:19,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:58:19,025 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-03 08:58:19,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 08:58:19,025 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:19,025 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-10-03 08:58:19,026 INFO L423 AbstractCegarLoop]: === Iteration 102 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:19,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:19,026 INFO L82 PathProgramCache]: Analyzing trace with hash -90864889, now seen corresponding path program 99 times [2018-10-03 08:58:19,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:19,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:19,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:19,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:19,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:19,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:19,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:58:19,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:58:19,594 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-03 08:58:19,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:19,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:19,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:19,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 08:58:19,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:58:19,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:58:19,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:58:19,632 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 37 states. [2018-10-03 08:58:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:19,751 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-03 08:58:19,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:58:19,752 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-03 08:58:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:19,752 INFO L225 Difference]: With dead ends: 77 [2018-10-03 08:58:19,753 INFO L226 Difference]: Without dead ends: 74 [2018-10-03 08:58:19,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:58:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-03 08:58:19,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-03 08:58:19,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-03 08:58:19,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-10-03 08:58:19,758 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2018-10-03 08:58:19,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:19,758 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-10-03 08:58:19,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:58:19,758 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-10-03 08:58:19,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-03 08:58:19,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:19,759 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1] [2018-10-03 08:58:19,759 INFO L423 AbstractCegarLoop]: === Iteration 103 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:19,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:19,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1478094215, now seen corresponding path program 100 times [2018-10-03 08:58:19,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:19,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:19,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:19,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:19,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:20,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:20,472 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 [2018-10-03 08:58:20,479 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:58:20,519 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:58:20,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:20,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:20,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:20,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 08:58:20,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:58:20,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:58:20,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:58:20,563 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 37 states. [2018-10-03 08:58:22,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:22,147 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-10-03 08:58:22,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:58:22,147 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2018-10-03 08:58:22,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:22,148 INFO L225 Difference]: With dead ends: 113 [2018-10-03 08:58:22,148 INFO L226 Difference]: Without dead ends: 110 [2018-10-03 08:58:22,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:58:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-03 08:58:22,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2018-10-03 08:58:22,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-03 08:58:22,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-03 08:58:22,154 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2018-10-03 08:58:22,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:22,154 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-03 08:58:22,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:58:22,154 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-03 08:58:22,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 08:58:22,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:22,154 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-10-03 08:58:22,155 INFO L423 AbstractCegarLoop]: === Iteration 104 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:22,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:22,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1423781113, now seen corresponding path program 101 times [2018-10-03 08:58:22,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:22,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:22,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:22,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:22,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:22,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:22,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:58:22,732 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:58:22,785 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 08:58:22,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:22,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:22,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:22,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 08:58:22,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:58:22,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:58:22,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:58:22,835 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 38 states. [2018-10-03 08:58:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:23,179 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-10-03 08:58:23,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:58:23,180 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-03 08:58:23,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:23,180 INFO L225 Difference]: With dead ends: 114 [2018-10-03 08:58:23,181 INFO L226 Difference]: Without dead ends: 75 [2018-10-03 08:58:23,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:58:23,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-03 08:58:23,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-03 08:58:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 08:58:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-03 08:58:23,188 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 74 [2018-10-03 08:58:23,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:23,188 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-03 08:58:23,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:58:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-03 08:58:23,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 08:58:23,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:23,189 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-10-03 08:58:23,189 INFO L423 AbstractCegarLoop]: === Iteration 105 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:23,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:23,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1920550099, now seen corresponding path program 102 times [2018-10-03 08:58:23,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:23,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:23,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:23,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:23,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:23,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:23,846 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 [2018-10-03 08:58:23,854 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:58:23,907 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 08:58:23,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:23,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:23,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:23,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 08:58:23,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:58:23,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:58:23,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:58:23,944 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-10-03 08:58:24,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:24,049 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-03 08:58:24,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:58:24,050 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-03 08:58:24,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:24,051 INFO L225 Difference]: With dead ends: 79 [2018-10-03 08:58:24,051 INFO L226 Difference]: Without dead ends: 76 [2018-10-03 08:58:24,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:58:24,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-03 08:58:24,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-03 08:58:24,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-03 08:58:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-10-03 08:58:24,057 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2018-10-03 08:58:24,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:24,057 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-10-03 08:58:24,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:58:24,057 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-10-03 08:58:24,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-03 08:58:24,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:24,058 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1] [2018-10-03 08:58:24,058 INFO L423 AbstractCegarLoop]: === Iteration 106 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:24,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:24,058 INFO L82 PathProgramCache]: Analyzing trace with hash 592427553, now seen corresponding path program 103 times [2018-10-03 08:58:24,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:24,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:24,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:24,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:24,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:25,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:25,099 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 [2018-10-03 08:58:25,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:25,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:25,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:25,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 08:58:25,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:58:25,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:58:25,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:58:25,192 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 38 states. [2018-10-03 08:58:26,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:26,843 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-03 08:58:26,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:58:26,844 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2018-10-03 08:58:26,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:26,845 INFO L225 Difference]: With dead ends: 116 [2018-10-03 08:58:26,845 INFO L226 Difference]: Without dead ends: 113 [2018-10-03 08:58:26,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:58:26,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-03 08:58:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2018-10-03 08:58:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-03 08:58:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2018-10-03 08:58:26,852 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2018-10-03 08:58:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:26,852 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2018-10-03 08:58:26,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:58:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2018-10-03 08:58:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-03 08:58:26,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:26,853 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-10-03 08:58:26,853 INFO L423 AbstractCegarLoop]: === Iteration 107 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:26,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:26,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1185323437, now seen corresponding path program 104 times [2018-10-03 08:58:26,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:26,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:26,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:26,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:26,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:27,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:27,409 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 [2018-10-03 08:58:27,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:58:27,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:58:27,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:27,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:27,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:27,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-03 08:58:27,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:58:27,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:58:27,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:58:27,532 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 39 states. [2018-10-03 08:58:27,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:27,900 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-10-03 08:58:27,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:58:27,900 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-03 08:58:27,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:27,901 INFO L225 Difference]: With dead ends: 117 [2018-10-03 08:58:27,901 INFO L226 Difference]: Without dead ends: 77 [2018-10-03 08:58:27,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:58:27,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-03 08:58:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-03 08:58:27,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-03 08:58:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-03 08:58:27,907 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2018-10-03 08:58:27,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:27,907 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-03 08:58:27,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:58:27,907 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-03 08:58:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-03 08:58:27,907 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:27,907 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-10-03 08:58:27,908 INFO L423 AbstractCegarLoop]: === Iteration 108 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:27,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:27,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1329613241, now seen corresponding path program 105 times [2018-10-03 08:58:27,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:27,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:27,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:27,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:27,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:28,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:28,491 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 [2018-10-03 08:58:28,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:58:28,587 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-10-03 08:58:28,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:28,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:28,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:28,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-03 08:58:28,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:58:28,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:58:28,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:58:28,633 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 39 states. [2018-10-03 08:58:28,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:28,751 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-03 08:58:28,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:58:28,752 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-03 08:58:28,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:28,752 INFO L225 Difference]: With dead ends: 81 [2018-10-03 08:58:28,752 INFO L226 Difference]: Without dead ends: 78 [2018-10-03 08:58:28,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:58:28,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-03 08:58:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-03 08:58:28,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-03 08:58:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-03 08:58:28,757 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2018-10-03 08:58:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:28,757 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-03 08:58:28,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:58:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-03 08:58:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-03 08:58:28,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:28,758 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1] [2018-10-03 08:58:28,758 INFO L423 AbstractCegarLoop]: === Iteration 109 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:28,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:28,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1731600967, now seen corresponding path program 106 times [2018-10-03 08:58:28,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:28,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:28,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:28,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:28,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:29,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:29,912 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 [2018-10-03 08:58:29,919 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:58:29,968 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:58:29,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:29,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:30,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:30,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 08:58:30,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:58:30,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:58:30,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:58:30,009 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 39 states. [2018-10-03 08:58:31,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:31,720 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-10-03 08:58:31,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:58:31,720 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2018-10-03 08:58:31,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:31,721 INFO L225 Difference]: With dead ends: 119 [2018-10-03 08:58:31,721 INFO L226 Difference]: Without dead ends: 116 [2018-10-03 08:58:31,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:58:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-03 08:58:31,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-10-03 08:58:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-03 08:58:31,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-03 08:58:31,727 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2018-10-03 08:58:31,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:31,727 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-03 08:58:31,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:58:31,727 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-03 08:58:31,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:58:31,727 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:31,728 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-10-03 08:58:31,728 INFO L423 AbstractCegarLoop]: === Iteration 110 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:31,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:31,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2139960903, now seen corresponding path program 107 times [2018-10-03 08:58:31,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:31,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:31,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:31,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:31,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:32,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:32,549 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 [2018-10-03 08:58:32,557 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:58:32,611 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-10-03 08:58:32,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:32,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:32,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:32,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 08:58:32,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:58:32,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:58:32,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:58:32,658 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2018-10-03 08:58:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:33,095 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-10-03 08:58:33,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:58:33,096 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-03 08:58:33,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:33,096 INFO L225 Difference]: With dead ends: 120 [2018-10-03 08:58:33,096 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 08:58:33,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:58:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 08:58:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-03 08:58:33,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 08:58:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-03 08:58:33,103 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 78 [2018-10-03 08:58:33,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:33,104 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-03 08:58:33,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:58:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-03 08:58:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:58:33,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:33,104 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-10-03 08:58:33,105 INFO L423 AbstractCegarLoop]: === Iteration 111 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:33,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:33,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1486335213, now seen corresponding path program 108 times [2018-10-03 08:58:33,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:33,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:33,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:33,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:33,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:33,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:33,700 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 [2018-10-03 08:58:33,721 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:58:33,775 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-03 08:58:33,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:33,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:33,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:33,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 08:58:33,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:58:33,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:58:33,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:58:33,830 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-10-03 08:58:33,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:33,993 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-10-03 08:58:33,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:58:33,993 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-03 08:58:33,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:33,994 INFO L225 Difference]: With dead ends: 83 [2018-10-03 08:58:33,994 INFO L226 Difference]: Without dead ends: 80 [2018-10-03 08:58:33,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:58:33,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-03 08:58:34,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-03 08:58:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-03 08:58:34,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-10-03 08:58:34,001 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2018-10-03 08:58:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:34,001 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-10-03 08:58:34,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:58:34,001 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-10-03 08:58:34,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-03 08:58:34,001 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:34,002 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1] [2018-10-03 08:58:34,002 INFO L423 AbstractCegarLoop]: === Iteration 112 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:34,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:34,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1168310175, now seen corresponding path program 109 times [2018-10-03 08:58:34,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:34,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:34,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:34,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:34,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:34,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:34,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:58:34,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:34,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:34,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:34,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-03 08:58:34,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:58:34,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:58:34,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:58:34,896 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 40 states. [2018-10-03 08:58:36,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:36,647 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-03 08:58:36,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:58:36,648 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2018-10-03 08:58:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:36,648 INFO L225 Difference]: With dead ends: 122 [2018-10-03 08:58:36,649 INFO L226 Difference]: Without dead ends: 119 [2018-10-03 08:58:36,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:58:36,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-03 08:58:36,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2018-10-03 08:58:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-03 08:58:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-10-03 08:58:36,656 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2018-10-03 08:58:36,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:36,656 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-10-03 08:58:36,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:58:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-10-03 08:58:36,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 08:58:36,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:36,657 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-10-03 08:58:36,657 INFO L423 AbstractCegarLoop]: === Iteration 113 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:36,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:36,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1857938579, now seen corresponding path program 110 times [2018-10-03 08:58:36,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:36,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:36,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:36,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:36,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:37,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:37,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:58:37,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:58:37,401 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:58:37,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:37,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:37,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:37,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 08:58:37,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:58:37,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:58:37,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:58:37,438 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2018-10-03 08:58:37,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:37,842 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-10-03 08:58:37,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:58:37,842 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-03 08:58:37,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:37,843 INFO L225 Difference]: With dead ends: 123 [2018-10-03 08:58:37,843 INFO L226 Difference]: Without dead ends: 81 [2018-10-03 08:58:37,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:58:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-03 08:58:37,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-03 08:58:37,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-03 08:58:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-03 08:58:37,849 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 80 [2018-10-03 08:58:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:37,849 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-03 08:58:37,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:58:37,849 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-03 08:58:37,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 08:58:37,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:37,849 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-10-03 08:58:37,850 INFO L423 AbstractCegarLoop]: === Iteration 114 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:37,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:37,850 INFO L82 PathProgramCache]: Analyzing trace with hash -645498489, now seen corresponding path program 111 times [2018-10-03 08:58:37,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:37,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:37,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:37,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:37,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:38,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:38,450 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 [2018-10-03 08:58:38,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:58:38,515 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-10-03 08:58:38,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:38,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:38,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:38,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 08:58:38,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:58:38,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:58:38,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:58:38,569 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 41 states. [2018-10-03 08:58:38,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:38,684 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-03 08:58:38,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:58:38,685 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-03 08:58:38,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:38,685 INFO L225 Difference]: With dead ends: 85 [2018-10-03 08:58:38,685 INFO L226 Difference]: Without dead ends: 82 [2018-10-03 08:58:38,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:58:38,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-03 08:58:38,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-03 08:58:38,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-03 08:58:38,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-10-03 08:58:38,690 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2018-10-03 08:58:38,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:38,690 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-10-03 08:58:38,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:58:38,690 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-10-03 08:58:38,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-03 08:58:38,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:38,691 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1] [2018-10-03 08:58:38,691 INFO L423 AbstractCegarLoop]: === Iteration 115 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:38,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:38,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1464321799, now seen corresponding path program 112 times [2018-10-03 08:58:38,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:38,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:38,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:38,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:38,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:39,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:39,527 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 [2018-10-03 08:58:39,534 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:58:39,582 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:58:39,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:39,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:39,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:39,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 08:58:39,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:58:39,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:58:39,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:58:39,625 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 41 states. [2018-10-03 08:58:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:41,478 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-10-03 08:58:41,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:58:41,478 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2018-10-03 08:58:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:41,479 INFO L225 Difference]: With dead ends: 125 [2018-10-03 08:58:41,479 INFO L226 Difference]: Without dead ends: 122 [2018-10-03 08:58:41,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:58:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-03 08:58:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2018-10-03 08:58:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-03 08:58:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-03 08:58:41,485 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2018-10-03 08:58:41,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:41,485 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-03 08:58:41,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:58:41,485 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-03 08:58:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 08:58:41,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:41,485 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-10-03 08:58:41,486 INFO L423 AbstractCegarLoop]: === Iteration 116 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:41,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:41,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1850726009, now seen corresponding path program 113 times [2018-10-03 08:58:41,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:41,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:41,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:41,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:41,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:42,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:42,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:58:42,174 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:58:42,235 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-10-03 08:58:42,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:42,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:42,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:42,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 08:58:42,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:58:42,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:58:42,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:58:42,273 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 42 states. [2018-10-03 08:58:42,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:42,750 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-10-03 08:58:42,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:58:42,751 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-03 08:58:42,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:42,751 INFO L225 Difference]: With dead ends: 126 [2018-10-03 08:58:42,752 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:58:42,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:58:42,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:58:42,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-03 08:58:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-03 08:58:42,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-03 08:58:42,757 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 82 [2018-10-03 08:58:42,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:42,758 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-03 08:58:42,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:58:42,758 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-03 08:58:42,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 08:58:42,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:42,758 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-10-03 08:58:42,759 INFO L423 AbstractCegarLoop]: === Iteration 117 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:42,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:42,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1375178413, now seen corresponding path program 114 times [2018-10-03 08:58:42,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:42,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:42,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:42,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:42,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:43,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:43,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:58:43,428 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:58:43,489 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-03 08:58:43,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:43,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:43,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:43,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 08:58:43,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:58:43,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:58:43,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:58:43,526 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-10-03 08:58:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:43,643 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-10-03 08:58:43,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:58:43,643 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-03 08:58:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:43,644 INFO L225 Difference]: With dead ends: 87 [2018-10-03 08:58:43,644 INFO L226 Difference]: Without dead ends: 84 [2018-10-03 08:58:43,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:58:43,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-03 08:58:43,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-03 08:58:43,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-03 08:58:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-10-03 08:58:43,650 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 82 [2018-10-03 08:58:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:43,650 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-10-03 08:58:43,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:58:43,650 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-10-03 08:58:43,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-03 08:58:43,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:43,651 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1] [2018-10-03 08:58:43,651 INFO L423 AbstractCegarLoop]: === Iteration 118 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:43,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:43,651 INFO L82 PathProgramCache]: Analyzing trace with hash -319203679, now seen corresponding path program 115 times [2018-10-03 08:58:43,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:43,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:43,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:43,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:43,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:44,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:44,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:44,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:44,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:44,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:44,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 08:58:44,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:58:44,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:58:44,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:58:44,608 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 42 states. [2018-10-03 08:58:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:46,555 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-03 08:58:46,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:58:46,556 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2018-10-03 08:58:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:46,556 INFO L225 Difference]: With dead ends: 128 [2018-10-03 08:58:46,556 INFO L226 Difference]: Without dead ends: 125 [2018-10-03 08:58:46,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:58:46,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-03 08:58:46,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2018-10-03 08:58:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-03 08:58:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-03 08:58:46,562 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-10-03 08:58:46,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:46,562 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-03 08:58:46,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:58:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-03 08:58:46,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-03 08:58:46,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:46,563 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-10-03 08:58:46,563 INFO L423 AbstractCegarLoop]: === Iteration 119 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:46,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1305440979, now seen corresponding path program 116 times [2018-10-03 08:58:46,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:46,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:46,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:46,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:46,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:47,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:47,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:47,210 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:58:47,260 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:58:47,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:47,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:47,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:47,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 08:58:47,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:58:47,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:58:47,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:58:47,299 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 43 states. [2018-10-03 08:58:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:47,617 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-10-03 08:58:47,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:58:47,618 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-03 08:58:47,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:47,618 INFO L225 Difference]: With dead ends: 129 [2018-10-03 08:58:47,618 INFO L226 Difference]: Without dead ends: 85 [2018-10-03 08:58:47,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:58:47,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-03 08:58:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-03 08:58:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-03 08:58:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-03 08:58:47,626 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2018-10-03 08:58:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:47,626 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-03 08:58:47,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:58:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-03 08:58:47,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-03 08:58:47,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:47,627 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-10-03 08:58:47,627 INFO L423 AbstractCegarLoop]: === Iteration 120 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:47,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:47,627 INFO L82 PathProgramCache]: Analyzing trace with hash -86651705, now seen corresponding path program 117 times [2018-10-03 08:58:47,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:47,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:47,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:47,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:47,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:48,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:48,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:48,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:58:48,531 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-03 08:58:48,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:48,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:48,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:48,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 08:58:48,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:58:48,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:58:48,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:58:48,570 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 43 states. [2018-10-03 08:58:48,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:48,705 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-03 08:58:48,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:58:48,705 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-03 08:58:48,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:48,706 INFO L225 Difference]: With dead ends: 89 [2018-10-03 08:58:48,706 INFO L226 Difference]: Without dead ends: 86 [2018-10-03 08:58:48,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:58:48,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-03 08:58:48,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-03 08:58:48,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-03 08:58:48,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-10-03 08:58:48,713 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2018-10-03 08:58:48,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:48,713 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-10-03 08:58:48,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:58:48,713 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-10-03 08:58:48,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-03 08:58:48,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:48,714 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1] [2018-10-03 08:58:48,714 INFO L423 AbstractCegarLoop]: === Iteration 121 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:48,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:48,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1608702919, now seen corresponding path program 118 times [2018-10-03 08:58:48,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:48,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:48,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:48,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:48,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:49,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:49,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:49,637 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:58:49,683 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:58:49,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:49,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:49,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:49,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 08:58:49,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:58:49,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:58:49,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:58:49,759 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 43 states. [2018-10-03 08:58:51,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:51,806 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-10-03 08:58:51,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:58:51,806 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2018-10-03 08:58:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:51,807 INFO L225 Difference]: With dead ends: 131 [2018-10-03 08:58:51,807 INFO L226 Difference]: Without dead ends: 128 [2018-10-03 08:58:51,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:58:51,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-03 08:58:51,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 88. [2018-10-03 08:58:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-03 08:58:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-10-03 08:58:51,814 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2018-10-03 08:58:51,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:51,814 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-10-03 08:58:51,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:58:51,815 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-10-03 08:58:51,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 08:58:51,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:51,815 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-10-03 08:58:51,815 INFO L423 AbstractCegarLoop]: === Iteration 122 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:51,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:51,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1669878585, now seen corresponding path program 119 times [2018-10-03 08:58:51,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:51,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:51,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:51,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:51,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:52,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:52,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:52,512 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:58:52,578 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-03 08:58:52,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:52,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:52,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:52,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 08:58:52,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:58:52,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:58:52,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:58:52,622 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 44 states. [2018-10-03 08:58:53,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:53,050 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-10-03 08:58:53,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:58:53,050 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-03 08:58:53,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:53,051 INFO L225 Difference]: With dead ends: 132 [2018-10-03 08:58:53,051 INFO L226 Difference]: Without dead ends: 87 [2018-10-03 08:58:53,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:58:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-03 08:58:53,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-03 08:58:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-03 08:58:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-03 08:58:53,057 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 86 [2018-10-03 08:58:53,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:53,057 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-03 08:58:53,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:58:53,057 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-03 08:58:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 08:58:53,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:53,057 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-10-03 08:58:53,058 INFO L423 AbstractCegarLoop]: === Iteration 123 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:53,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:53,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1752850541, now seen corresponding path program 120 times [2018-10-03 08:58:53,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:53,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:53,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:53,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:53,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:53,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:53,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:53,771 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:58:53,829 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-03 08:58:53,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:53,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:53,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:53,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 08:58:53,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:58:53,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:58:53,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:58:53,869 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-10-03 08:58:53,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:53,988 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-10-03 08:58:53,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:58:53,988 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-03 08:58:53,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:53,989 INFO L225 Difference]: With dead ends: 91 [2018-10-03 08:58:53,989 INFO L226 Difference]: Without dead ends: 88 [2018-10-03 08:58:53,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:58:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-03 08:58:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-03 08:58:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-03 08:58:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-10-03 08:58:53,996 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 86 [2018-10-03 08:58:53,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:53,996 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-10-03 08:58:53,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:58:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-10-03 08:58:53,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-03 08:58:53,997 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:53,997 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1] [2018-10-03 08:58:53,997 INFO L423 AbstractCegarLoop]: === Iteration 124 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:53,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:53,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1496269599, now seen corresponding path program 121 times [2018-10-03 08:58:53,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:53,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:53,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:53,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:53,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:54,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:54,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:54,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:55,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:55,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:55,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 08:58:55,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:58:55,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:58:55,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:58:55,063 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 44 states. [2018-10-03 08:58:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:57,261 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-03 08:58:57,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:58:57,262 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2018-10-03 08:58:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:57,262 INFO L225 Difference]: With dead ends: 134 [2018-10-03 08:58:57,263 INFO L226 Difference]: Without dead ends: 131 [2018-10-03 08:58:57,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:58:57,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-03 08:58:57,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2018-10-03 08:58:57,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-03 08:58:57,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-10-03 08:58:57,269 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2018-10-03 08:58:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:57,269 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-10-03 08:58:57,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:58:57,269 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-10-03 08:58:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-03 08:58:57,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:57,269 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-10-03 08:58:57,269 INFO L423 AbstractCegarLoop]: === Iteration 125 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:57,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:57,270 INFO L82 PathProgramCache]: Analyzing trace with hash 860221165, now seen corresponding path program 122 times [2018-10-03 08:58:57,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:57,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:57,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:57,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:57,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:57,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:57,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:57,963 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:58:58,015 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:58:58,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:58,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:58,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:58,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-03 08:58:58,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:58:58,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:58:58,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:58:58,070 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 45 states. [2018-10-03 08:58:58,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:58,687 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-10-03 08:58:58,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:58:58,688 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-03 08:58:58,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:58,688 INFO L225 Difference]: With dead ends: 135 [2018-10-03 08:58:58,688 INFO L226 Difference]: Without dead ends: 89 [2018-10-03 08:58:58,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:58:58,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-03 08:58:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-03 08:58:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-03 08:58:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-03 08:58:58,694 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 88 [2018-10-03 08:58:58,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:58,694 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-03 08:58:58,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:58:58,694 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-03 08:58:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-03 08:58:58,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:58,695 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-10-03 08:58:58,695 INFO L423 AbstractCegarLoop]: === Iteration 126 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:58,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:58,695 INFO L82 PathProgramCache]: Analyzing trace with hash -409358329, now seen corresponding path program 123 times [2018-10-03 08:58:58,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:58,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:58,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:58,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:58,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:59,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:59,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:59,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:58:59,526 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-03 08:58:59,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:59,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:59,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:59,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-03 08:58:59,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:58:59,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:58:59,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:58:59,568 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 45 states. [2018-10-03 08:58:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:59,727 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-03 08:58:59,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:58:59,727 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-03 08:58:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:59,728 INFO L225 Difference]: With dead ends: 93 [2018-10-03 08:58:59,728 INFO L226 Difference]: Without dead ends: 90 [2018-10-03 08:58:59,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:58:59,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-03 08:58:59,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-03 08:58:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-03 08:58:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-10-03 08:58:59,737 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2018-10-03 08:58:59,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:59,737 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-10-03 08:58:59,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:58:59,737 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-10-03 08:58:59,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-03 08:58:59,737 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:59,737 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1] [2018-10-03 08:58:59,737 INFO L423 AbstractCegarLoop]: === Iteration 127 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:59,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:59,738 INFO L82 PathProgramCache]: Analyzing trace with hash 194732167, now seen corresponding path program 124 times [2018-10-03 08:58:59,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:59,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:59,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:59,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:59,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:00,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:00,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:00,708 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:59:00,762 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:59:00,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:00,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:00,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:00,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 08:59:00,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:59:00,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:59:00,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:59:00,806 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 45 states. [2018-10-03 08:59:03,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:03,064 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-10-03 08:59:03,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:59:03,065 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2018-10-03 08:59:03,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:03,066 INFO L225 Difference]: With dead ends: 137 [2018-10-03 08:59:03,066 INFO L226 Difference]: Without dead ends: 134 [2018-10-03 08:59:03,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:59:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-03 08:59:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2018-10-03 08:59:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-03 08:59:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-10-03 08:59:03,071 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-10-03 08:59:03,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:03,071 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-10-03 08:59:03,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:59:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-10-03 08:59:03,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 08:59:03,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:03,072 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-10-03 08:59:03,072 INFO L423 AbstractCegarLoop]: === Iteration 128 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:03,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:03,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1741668359, now seen corresponding path program 125 times [2018-10-03 08:59:03,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:03,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:03,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:03,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:03,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:03,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:03,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:03,774 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:59:03,847 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-03 08:59:03,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:03,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:03,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:03,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 08:59:03,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:59:03,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:59:03,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:59:03,887 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 46 states. [2018-10-03 08:59:04,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:04,463 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-10-03 08:59:04,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:59:04,465 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-03 08:59:04,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:04,465 INFO L225 Difference]: With dead ends: 138 [2018-10-03 08:59:04,466 INFO L226 Difference]: Without dead ends: 91 [2018-10-03 08:59:04,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:59:04,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-03 08:59:04,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-03 08:59:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 08:59:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-03 08:59:04,471 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 90 [2018-10-03 08:59:04,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:04,472 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-03 08:59:04,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:59:04,472 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-03 08:59:04,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 08:59:04,472 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:04,472 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-10-03 08:59:04,473 INFO L423 AbstractCegarLoop]: === Iteration 129 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:04,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:04,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1039409709, now seen corresponding path program 126 times [2018-10-03 08:59:04,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:04,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:04,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:04,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:04,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:05,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:05,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:05,233 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:59:05,295 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-03 08:59:05,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:05,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:05,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:05,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 08:59:05,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:59:05,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:59:05,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:59:05,338 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-10-03 08:59:05,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:05,487 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2018-10-03 08:59:05,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:59:05,488 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-03 08:59:05,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:05,488 INFO L225 Difference]: With dead ends: 95 [2018-10-03 08:59:05,488 INFO L226 Difference]: Without dead ends: 92 [2018-10-03 08:59:05,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:59:05,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-03 08:59:05,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-03 08:59:05,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-03 08:59:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-10-03 08:59:05,494 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 90 [2018-10-03 08:59:05,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:05,494 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-10-03 08:59:05,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:59:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-10-03 08:59:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-03 08:59:05,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:05,495 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1] [2018-10-03 08:59:05,495 INFO L423 AbstractCegarLoop]: === Iteration 130 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:05,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:05,496 INFO L82 PathProgramCache]: Analyzing trace with hash -2138098911, now seen corresponding path program 127 times [2018-10-03 08:59:05,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:05,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:05,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:05,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:05,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:06,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:06,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:06,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:59:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:06,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:06,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:06,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-03 08:59:06,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:59:06,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:59:06,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:59:06,673 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 46 states. [2018-10-03 08:59:09,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:09,043 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-03 08:59:09,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:59:09,044 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2018-10-03 08:59:09,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:09,044 INFO L225 Difference]: With dead ends: 140 [2018-10-03 08:59:09,044 INFO L226 Difference]: Without dead ends: 137 [2018-10-03 08:59:09,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:59:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-03 08:59:09,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2018-10-03 08:59:09,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-03 08:59:09,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-03 08:59:09,051 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2018-10-03 08:59:09,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:09,051 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-03 08:59:09,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:59:09,051 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-03 08:59:09,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-03 08:59:09,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:09,051 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-10-03 08:59:09,052 INFO L423 AbstractCegarLoop]: === Iteration 131 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:09,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:09,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1856618323, now seen corresponding path program 128 times [2018-10-03 08:59:09,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:09,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:09,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:09,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:59:09,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:09,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:09,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:09,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:59:09,843 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:59:09,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:09,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:09,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:09,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 08:59:09,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:59:09,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:59:09,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:59:09,882 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 47 states. [2018-10-03 08:59:10,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:10,475 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-10-03 08:59:10,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:59:10,476 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-03 08:59:10,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:10,476 INFO L225 Difference]: With dead ends: 141 [2018-10-03 08:59:10,476 INFO L226 Difference]: Without dead ends: 93 [2018-10-03 08:59:10,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:59:10,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-03 08:59:10,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-03 08:59:10,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-03 08:59:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-03 08:59:10,483 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 92 [2018-10-03 08:59:10,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:10,483 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-03 08:59:10,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:59:10,483 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-03 08:59:10,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-03 08:59:10,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:10,484 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-10-03 08:59:10,484 INFO L423 AbstractCegarLoop]: === Iteration 132 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:10,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:10,484 INFO L82 PathProgramCache]: Analyzing trace with hash 2143167303, now seen corresponding path program 129 times [2018-10-03 08:59:10,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:10,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:10,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:10,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:10,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:11,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:11,289 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:11,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:59:11,364 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-10-03 08:59:11,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:11,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:11,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:11,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 08:59:11,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:59:11,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:59:11,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:59:11,408 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 47 states. [2018-10-03 08:59:11,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:11,545 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-03 08:59:11,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:59:11,546 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-03 08:59:11,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:11,546 INFO L225 Difference]: With dead ends: 97 [2018-10-03 08:59:11,546 INFO L226 Difference]: Without dead ends: 94 [2018-10-03 08:59:11,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:59:11,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-03 08:59:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-03 08:59:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-03 08:59:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-10-03 08:59:11,555 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2018-10-03 08:59:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:11,555 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-10-03 08:59:11,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:59:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-10-03 08:59:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-03 08:59:11,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:11,556 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1] [2018-10-03 08:59:11,556 INFO L423 AbstractCegarLoop]: === Iteration 133 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:11,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:11,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2013615431, now seen corresponding path program 130 times [2018-10-03 08:59:11,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:11,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:11,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:11,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:11,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:12,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:12,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:12,745 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:59:12,801 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:59:12,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:12,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:12,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:12,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 08:59:12,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:59:12,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:59:12,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:59:12,847 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 47 states. [2018-10-03 08:59:15,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:15,320 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2018-10-03 08:59:15,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:59:15,321 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2018-10-03 08:59:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:15,322 INFO L225 Difference]: With dead ends: 143 [2018-10-03 08:59:15,322 INFO L226 Difference]: Without dead ends: 140 [2018-10-03 08:59:15,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:59:15,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-03 08:59:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2018-10-03 08:59:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-03 08:59:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-10-03 08:59:15,327 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2018-10-03 08:59:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:15,327 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-10-03 08:59:15,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:59:15,327 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-10-03 08:59:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-03 08:59:15,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:15,328 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-10-03 08:59:15,328 INFO L423 AbstractCegarLoop]: === Iteration 134 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:15,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:15,328 INFO L82 PathProgramCache]: Analyzing trace with hash -2002492601, now seen corresponding path program 131 times [2018-10-03 08:59:15,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:15,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:15,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:15,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:15,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:16,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:16,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:16,096 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:59:16,165 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-03 08:59:16,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:16,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:16,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:16,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 08:59:16,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:59:16,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:59:16,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:59:16,205 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2018-10-03 08:59:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:16,598 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2018-10-03 08:59:16,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:59:16,598 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-03 08:59:16,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:16,599 INFO L225 Difference]: With dead ends: 144 [2018-10-03 08:59:16,599 INFO L226 Difference]: Without dead ends: 95 [2018-10-03 08:59:16,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:59:16,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-03 08:59:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-03 08:59:16,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-03 08:59:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-03 08:59:16,605 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 94 [2018-10-03 08:59:16,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:16,605 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-03 08:59:16,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:59:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-03 08:59:16,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-03 08:59:16,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:16,606 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-10-03 08:59:16,606 INFO L423 AbstractCegarLoop]: === Iteration 135 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:16,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:16,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1731777517, now seen corresponding path program 132 times [2018-10-03 08:59:16,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:16,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:16,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:16,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:16,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:17,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:17,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:17,464 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:59:17,530 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-03 08:59:17,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:17,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:17,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:17,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 08:59:17,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:59:17,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:59:17,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:59:17,570 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-10-03 08:59:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:17,706 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2018-10-03 08:59:17,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:59:17,706 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-03 08:59:17,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:17,707 INFO L225 Difference]: With dead ends: 99 [2018-10-03 08:59:17,707 INFO L226 Difference]: Without dead ends: 96 [2018-10-03 08:59:17,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:59:17,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-03 08:59:17,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-03 08:59:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-03 08:59:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-10-03 08:59:17,713 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 94 [2018-10-03 08:59:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:17,714 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-10-03 08:59:17,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:59:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-10-03 08:59:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-03 08:59:17,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:17,714 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1] [2018-10-03 08:59:17,714 INFO L423 AbstractCegarLoop]: === Iteration 136 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:17,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:17,715 INFO L82 PathProgramCache]: Analyzing trace with hash 2145433953, now seen corresponding path program 133 times [2018-10-03 08:59:17,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:17,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:17,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:17,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:17,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:18,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:18,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:18,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:59:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:18,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:18,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:18,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 08:59:18,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:59:18,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:59:18,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:59:18,916 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 48 states. [2018-10-03 08:59:21,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:21,491 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-03 08:59:21,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:59:21,492 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2018-10-03 08:59:21,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:21,492 INFO L225 Difference]: With dead ends: 146 [2018-10-03 08:59:21,492 INFO L226 Difference]: Without dead ends: 143 [2018-10-03 08:59:21,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:59:21,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-03 08:59:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2018-10-03 08:59:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-03 08:59:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2018-10-03 08:59:21,499 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2018-10-03 08:59:21,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:21,499 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2018-10-03 08:59:21,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:59:21,499 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2018-10-03 08:59:21,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-03 08:59:21,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:21,500 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-10-03 08:59:21,500 INFO L423 AbstractCegarLoop]: === Iteration 137 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:21,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:21,500 INFO L82 PathProgramCache]: Analyzing trace with hash 2083881581, now seen corresponding path program 134 times [2018-10-03 08:59:21,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:21,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:21,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:21,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:59:21,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:22,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:22,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:22,320 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:59:22,374 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:59:22,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:22,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:22,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:22,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-03 08:59:22,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:59:22,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:59:22,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:59:22,422 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2018-10-03 08:59:23,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:23,082 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-10-03 08:59:23,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:59:23,083 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-03 08:59:23,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:23,083 INFO L225 Difference]: With dead ends: 147 [2018-10-03 08:59:23,083 INFO L226 Difference]: Without dead ends: 97 [2018-10-03 08:59:23,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:59:23,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-03 08:59:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-03 08:59:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-03 08:59:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-03 08:59:23,090 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 96 [2018-10-03 08:59:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:23,091 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-03 08:59:23,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:59:23,091 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-03 08:59:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-03 08:59:23,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:23,091 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-10-03 08:59:23,091 INFO L423 AbstractCegarLoop]: === Iteration 138 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:23,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:23,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1882138247, now seen corresponding path program 135 times [2018-10-03 08:59:23,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:23,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:23,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:23,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:23,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:23,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:23,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:23,941 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:59:24,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-03 08:59:24,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:24,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:24,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:24,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-03 08:59:24,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:59:24,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:59:24,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:59:24,054 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 49 states. [2018-10-03 08:59:24,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:24,210 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-03 08:59:24,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:59:24,210 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-03 08:59:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:24,211 INFO L225 Difference]: With dead ends: 101 [2018-10-03 08:59:24,211 INFO L226 Difference]: Without dead ends: 98 [2018-10-03 08:59:24,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:59:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-03 08:59:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-03 08:59:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-03 08:59:24,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-10-03 08:59:24,217 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2018-10-03 08:59:24,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:24,217 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-10-03 08:59:24,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:59:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-10-03 08:59:24,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-03 08:59:24,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:24,218 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1] [2018-10-03 08:59:24,218 INFO L423 AbstractCegarLoop]: === Iteration 139 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:24,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:24,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1783318009, now seen corresponding path program 136 times [2018-10-03 08:59:24,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:24,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:24,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:24,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:24,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:25,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:25,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:25,358 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:59:25,413 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:59:25,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:25,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:25,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:25,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 08:59:25,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:59:25,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:59:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:59:25,458 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 49 states. [2018-10-03 08:59:28,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:28,160 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-10-03 08:59:28,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:59:28,161 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 97 [2018-10-03 08:59:28,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:28,161 INFO L225 Difference]: With dead ends: 149 [2018-10-03 08:59:28,161 INFO L226 Difference]: Without dead ends: 146 [2018-10-03 08:59:28,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:59:28,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-03 08:59:28,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2018-10-03 08:59:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-03 08:59:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-03 08:59:28,168 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2018-10-03 08:59:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:28,168 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-03 08:59:28,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:59:28,168 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-03 08:59:28,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 08:59:28,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:28,169 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-10-03 08:59:28,169 INFO L423 AbstractCegarLoop]: === Iteration 140 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:28,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:28,169 INFO L82 PathProgramCache]: Analyzing trace with hash 551655047, now seen corresponding path program 137 times [2018-10-03 08:59:28,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:28,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:28,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:28,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:28,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:29,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:29,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:29,011 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:59:29,086 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-03 08:59:29,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:29,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:29,142 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:29,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 08:59:29,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:59:29,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:59:29,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:59:29,143 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 50 states. [2018-10-03 08:59:29,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:29,860 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-10-03 08:59:29,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:59:29,861 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-03 08:59:29,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:29,861 INFO L225 Difference]: With dead ends: 150 [2018-10-03 08:59:29,861 INFO L226 Difference]: Without dead ends: 99 [2018-10-03 08:59:29,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:59:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-03 08:59:29,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-03 08:59:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-03 08:59:29,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-03 08:59:29,868 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 98 [2018-10-03 08:59:29,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:29,869 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-03 08:59:29,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:59:29,869 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-03 08:59:29,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 08:59:29,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:29,869 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-10-03 08:59:29,869 INFO L423 AbstractCegarLoop]: === Iteration 141 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:29,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:29,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1407421011, now seen corresponding path program 138 times [2018-10-03 08:59:29,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:29,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:29,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:29,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:29,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:30,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:30,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:30,751 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:59:30,825 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-03 08:59:30,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:30,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:30,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:30,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 08:59:30,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:59:30,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:59:30,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:59:30,865 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-10-03 08:59:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:31,037 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-10-03 08:59:31,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:59:31,038 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-03 08:59:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:31,038 INFO L225 Difference]: With dead ends: 103 [2018-10-03 08:59:31,039 INFO L226 Difference]: Without dead ends: 100 [2018-10-03 08:59:31,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:59:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-03 08:59:31,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-03 08:59:31,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-03 08:59:31,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-10-03 08:59:31,045 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 98 [2018-10-03 08:59:31,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:31,045 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-10-03 08:59:31,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:59:31,045 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-10-03 08:59:31,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-03 08:59:31,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:31,046 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1] [2018-10-03 08:59:31,046 INFO L423 AbstractCegarLoop]: === Iteration 142 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:31,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:31,046 INFO L82 PathProgramCache]: Analyzing trace with hash -680439903, now seen corresponding path program 139 times [2018-10-03 08:59:31,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:31,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:31,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:31,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:31,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:32,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:32,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:32,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:59:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:32,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:32,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:32,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-03 08:59:32,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:59:32,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:59:32,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:59:32,336 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 50 states. [2018-10-03 08:59:35,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:35,137 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-03 08:59:35,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:59:35,138 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2018-10-03 08:59:35,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:35,138 INFO L225 Difference]: With dead ends: 152 [2018-10-03 08:59:35,138 INFO L226 Difference]: Without dead ends: 149 [2018-10-03 08:59:35,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:59:35,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-03 08:59:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2018-10-03 08:59:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-03 08:59:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2018-10-03 08:59:35,145 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2018-10-03 08:59:35,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:35,145 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2018-10-03 08:59:35,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:59:35,146 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2018-10-03 08:59:35,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-03 08:59:35,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:35,146 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-10-03 08:59:35,146 INFO L423 AbstractCegarLoop]: === Iteration 143 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:35,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:35,146 INFO L82 PathProgramCache]: Analyzing trace with hash 381137965, now seen corresponding path program 140 times [2018-10-03 08:59:35,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:35,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:35,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:35,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:59:35,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:36,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:36,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:36,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:59:36,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:59:36,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:36,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:36,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:36,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-03 08:59:36,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:59:36,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:59:36,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:59:36,119 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 51 states. [2018-10-03 08:59:36,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:36,825 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2018-10-03 08:59:36,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:59:36,826 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-03 08:59:36,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:36,826 INFO L225 Difference]: With dead ends: 153 [2018-10-03 08:59:36,827 INFO L226 Difference]: Without dead ends: 101 [2018-10-03 08:59:36,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:59:36,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-03 08:59:36,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-03 08:59:36,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 08:59:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-03 08:59:36,834 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 100 [2018-10-03 08:59:36,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:36,835 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-03 08:59:36,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:59:36,835 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-03 08:59:36,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-03 08:59:36,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:36,835 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-10-03 08:59:36,836 INFO L423 AbstractCegarLoop]: === Iteration 144 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:36,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:36,836 INFO L82 PathProgramCache]: Analyzing trace with hash -220677689, now seen corresponding path program 141 times [2018-10-03 08:59:36,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:36,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:36,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:36,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:36,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:37,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:37,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:37,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:59:37,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-03 08:59:37,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:37,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:38,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:38,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-03 08:59:38,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:59:38,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:59:38,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:59:38,014 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 51 states. [2018-10-03 08:59:38,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:38,179 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-03 08:59:38,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:59:38,179 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-03 08:59:38,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:38,180 INFO L225 Difference]: With dead ends: 105 [2018-10-03 08:59:38,180 INFO L226 Difference]: Without dead ends: 102 [2018-10-03 08:59:38,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:59:38,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-03 08:59:38,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-03 08:59:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-03 08:59:38,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-10-03 08:59:38,186 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2018-10-03 08:59:38,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:38,187 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-10-03 08:59:38,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:59:38,187 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-10-03 08:59:38,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-03 08:59:38,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:38,187 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1] [2018-10-03 08:59:38,187 INFO L423 AbstractCegarLoop]: === Iteration 145 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:38,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:38,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1748864711, now seen corresponding path program 142 times [2018-10-03 08:59:38,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:38,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:38,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:38,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:38,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:39,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:39,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:39,438 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:59:39,500 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:59:39,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:39,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:39,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:39,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 08:59:39,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:59:39,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:59:39,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:59:39,549 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 51 states. [2018-10-03 08:59:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:42,493 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2018-10-03 08:59:42,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:59:42,494 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 101 [2018-10-03 08:59:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:42,494 INFO L225 Difference]: With dead ends: 155 [2018-10-03 08:59:42,495 INFO L226 Difference]: Without dead ends: 152 [2018-10-03 08:59:42,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:59:42,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-03 08:59:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2018-10-03 08:59:42,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-03 08:59:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-10-03 08:59:42,501 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-10-03 08:59:42,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:42,501 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-10-03 08:59:42,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:59:42,501 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-10-03 08:59:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-03 08:59:42,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:42,502 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-10-03 08:59:42,502 INFO L423 AbstractCegarLoop]: === Iteration 146 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:42,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:42,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1619830329, now seen corresponding path program 143 times [2018-10-03 08:59:42,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:42,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:42,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:42,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:42,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:43,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:43,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:43,417 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:59:43,497 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-03 08:59:43,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:43,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:43,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:43,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 08:59:43,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:59:43,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:59:43,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:59:43,539 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 52 states. [2018-10-03 08:59:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:44,283 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-10-03 08:59:44,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:59:44,283 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-03 08:59:44,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:44,284 INFO L225 Difference]: With dead ends: 156 [2018-10-03 08:59:44,284 INFO L226 Difference]: Without dead ends: 103 [2018-10-03 08:59:44,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:59:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-03 08:59:44,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-03 08:59:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-03 08:59:44,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-03 08:59:44,291 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 102 [2018-10-03 08:59:44,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:44,292 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-03 08:59:44,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:59:44,292 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-03 08:59:44,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-03 08:59:44,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:44,292 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-10-03 08:59:44,292 INFO L423 AbstractCegarLoop]: === Iteration 147 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:44,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:44,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1198720877, now seen corresponding path program 144 times [2018-10-03 08:59:44,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:44,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:44,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:44,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:44,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:45,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:45,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:45,266 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:59:45,341 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-03 08:59:45,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:45,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:45,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:45,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 08:59:45,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:59:45,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:59:45,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:59:45,383 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-10-03 08:59:45,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:45,530 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2018-10-03 08:59:45,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:59:45,530 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-03 08:59:45,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:45,531 INFO L225 Difference]: With dead ends: 107 [2018-10-03 08:59:45,531 INFO L226 Difference]: Without dead ends: 104 [2018-10-03 08:59:45,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:59:45,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-03 08:59:45,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-03 08:59:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-03 08:59:45,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-10-03 08:59:45,538 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 102 [2018-10-03 08:59:45,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:45,538 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-10-03 08:59:45,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:59:45,538 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-10-03 08:59:45,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-03 08:59:45,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:45,538 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1] [2018-10-03 08:59:45,539 INFO L423 AbstractCegarLoop]: === Iteration 148 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:45,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:45,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1494419999, now seen corresponding path program 145 times [2018-10-03 08:59:45,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:45,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:45,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:45,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:45,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:46,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:46,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:46,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:59:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:46,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:46,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:46,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-03 08:59:46,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:59:46,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:59:46,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:59:46,935 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 52 states. [2018-10-03 08:59:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:49,998 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-03 08:59:49,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:59:49,998 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 103 [2018-10-03 08:59:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:49,999 INFO L225 Difference]: With dead ends: 158 [2018-10-03 08:59:49,999 INFO L226 Difference]: Without dead ends: 155 [2018-10-03 08:59:49,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:59:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-03 08:59:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 106. [2018-10-03 08:59:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-03 08:59:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-03 08:59:50,006 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2018-10-03 08:59:50,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:50,006 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-03 08:59:50,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:59:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-03 08:59:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-03 08:59:50,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:50,006 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-10-03 08:59:50,006 INFO L423 AbstractCegarLoop]: === Iteration 149 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:50,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash 917558765, now seen corresponding path program 146 times [2018-10-03 08:59:50,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:50,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:50,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:50,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:59:50,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:50,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:50,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:50,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:50,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:59:51,023 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:59:51,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:51,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:51,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:51,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 08:59:51,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:59:51,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:59:51,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:59:51,066 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 53 states. [2018-10-03 08:59:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:51,537 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2018-10-03 08:59:51,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:59:51,537 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-03 08:59:51,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:51,538 INFO L225 Difference]: With dead ends: 159 [2018-10-03 08:59:51,538 INFO L226 Difference]: Without dead ends: 105 [2018-10-03 08:59:51,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:59:51,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-03 08:59:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-03 08:59:51,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-03 08:59:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-03 08:59:51,545 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 104 [2018-10-03 08:59:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:51,546 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-03 08:59:51,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:59:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-03 08:59:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-03 08:59:51,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:51,546 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-10-03 08:59:51,546 INFO L423 AbstractCegarLoop]: === Iteration 150 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:51,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:51,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1901667065, now seen corresponding path program 147 times [2018-10-03 08:59:51,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:51,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:51,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:51,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:51,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:52,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:52,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:52,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:59:52,644 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-10-03 08:59:52,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:52,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:52,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:52,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 08:59:52,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:59:52,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:59:52,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:59:52,687 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 53 states. [2018-10-03 08:59:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:52,836 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-03 08:59:52,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:59:52,837 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-03 08:59:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:52,837 INFO L225 Difference]: With dead ends: 109 [2018-10-03 08:59:52,837 INFO L226 Difference]: Without dead ends: 106 [2018-10-03 08:59:52,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:59:52,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-03 08:59:52,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-03 08:59:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-03 08:59:52,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-10-03 08:59:52,844 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2018-10-03 08:59:52,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:52,844 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-10-03 08:59:52,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:59:52,845 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-10-03 08:59:52,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-03 08:59:52,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:52,845 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1] [2018-10-03 08:59:52,845 INFO L423 AbstractCegarLoop]: === Iteration 151 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:52,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:52,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1177801607, now seen corresponding path program 148 times [2018-10-03 08:59:52,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:52,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:52,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:52,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:52,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:54,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:54,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:54,240 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:59:54,308 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:59:54,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:54,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:54,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:54,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 08:59:54,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:59:54,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:59:54,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:59:54,359 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 53 states. [2018-10-03 08:59:57,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:57,560 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-10-03 08:59:57,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:59:57,561 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 105 [2018-10-03 08:59:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:57,561 INFO L225 Difference]: With dead ends: 161 [2018-10-03 08:59:57,562 INFO L226 Difference]: Without dead ends: 158 [2018-10-03 08:59:57,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:59:57,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-03 08:59:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2018-10-03 08:59:57,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-03 08:59:57,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-03 08:59:57,568 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2018-10-03 08:59:57,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:57,569 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-03 08:59:57,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:59:57,569 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-03 08:59:57,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-03 08:59:57,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:57,569 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-10-03 08:59:57,569 INFO L423 AbstractCegarLoop]: === Iteration 152 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:57,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:57,570 INFO L82 PathProgramCache]: Analyzing trace with hash -2142917369, now seen corresponding path program 149 times [2018-10-03 08:59:57,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:57,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:57,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:57,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:57,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:58,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:58,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:58,573 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:59:58,661 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2018-10-03 08:59:58,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:58,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:58,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:58,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 08:59:58,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:59:58,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:59:58,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:59:58,706 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 54 states. [2018-10-03 08:59:59,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:59,565 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2018-10-03 08:59:59,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:59:59,566 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-03 08:59:59,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:59,566 INFO L225 Difference]: With dead ends: 162 [2018-10-03 08:59:59,566 INFO L226 Difference]: Without dead ends: 107 [2018-10-03 08:59:59,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:59:59,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-03 08:59:59,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-03 08:59:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-03 08:59:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-03 08:59:59,574 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 106 [2018-10-03 08:59:59,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:59,575 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-03 08:59:59,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:59:59,575 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-03 08:59:59,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-03 08:59:59,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:59,575 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-10-03 08:59:59,576 INFO L423 AbstractCegarLoop]: === Iteration 153 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:59,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:59,576 INFO L82 PathProgramCache]: Analyzing trace with hash 655395117, now seen corresponding path program 150 times [2018-10-03 08:59:59,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:59,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:59,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:59,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:59,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:00,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:00,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:00,651 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:00:00,727 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-03 09:00:00,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:00,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:00,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:00,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 09:00:00,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 09:00:00,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 09:00:00,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 09:00:00,773 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-10-03 09:00:00,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:00,977 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2018-10-03 09:00:00,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 09:00:00,984 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-03 09:00:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:00,984 INFO L225 Difference]: With dead ends: 111 [2018-10-03 09:00:00,984 INFO L226 Difference]: Without dead ends: 108 [2018-10-03 09:00:00,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 09:00:00,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-03 09:00:00,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-03 09:00:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-03 09:00:00,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-10-03 09:00:00,990 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 106 [2018-10-03 09:00:00,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:00,990 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-10-03 09:00:00,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 09:00:00,990 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-10-03 09:00:00,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-03 09:00:00,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:00,991 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1] [2018-10-03 09:00:00,991 INFO L423 AbstractCegarLoop]: === Iteration 154 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:00,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:00,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1157649375, now seen corresponding path program 151 times [2018-10-03 09:00:00,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:00,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:00,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:00,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:00,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:02,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:02,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:02,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:00:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:02,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:02,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:02,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 09:00:02,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 09:00:02,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 09:00:02,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 09:00:02,476 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 54 states. [2018-10-03 09:00:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:05,825 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-03 09:00:05,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 09:00:05,826 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 107 [2018-10-03 09:00:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:05,826 INFO L225 Difference]: With dead ends: 164 [2018-10-03 09:00:05,826 INFO L226 Difference]: Without dead ends: 161 [2018-10-03 09:00:05,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 09:00:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-03 09:00:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2018-10-03 09:00:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-03 09:00:05,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-03 09:00:05,833 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-10-03 09:00:05,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:05,833 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-03 09:00:05,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 09:00:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-03 09:00:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-03 09:00:05,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:05,834 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-10-03 09:00:05,834 INFO L423 AbstractCegarLoop]: === Iteration 155 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:05,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:05,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1527453779, now seen corresponding path program 152 times [2018-10-03 09:00:05,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:05,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:05,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:05,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:00:05,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:06,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:06,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:06,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:00:06,906 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:00:06,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:06,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:06,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:06,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 09:00:06,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 09:00:06,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 09:00:06,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 09:00:06,956 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 55 states. [2018-10-03 09:00:07,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:07,579 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2018-10-03 09:00:07,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 09:00:07,579 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-03 09:00:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:07,580 INFO L225 Difference]: With dead ends: 165 [2018-10-03 09:00:07,580 INFO L226 Difference]: Without dead ends: 109 [2018-10-03 09:00:07,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 09:00:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-03 09:00:07,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-03 09:00:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-03 09:00:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-03 09:00:07,590 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 108 [2018-10-03 09:00:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:07,590 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-03 09:00:07,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 09:00:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-03 09:00:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-03 09:00:07,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:07,591 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-10-03 09:00:07,591 INFO L423 AbstractCegarLoop]: === Iteration 156 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:07,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:07,592 INFO L82 PathProgramCache]: Analyzing trace with hash -679112633, now seen corresponding path program 153 times [2018-10-03 09:00:07,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:07,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:07,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:07,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:07,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:08,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:08,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:08,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:00:08,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-03 09:00:08,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:08,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:08,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:08,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 09:00:08,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 09:00:08,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 09:00:08,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 09:00:08,835 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 55 states. [2018-10-03 09:00:09,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:09,019 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-03 09:00:09,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 09:00:09,019 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-03 09:00:09,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:09,020 INFO L225 Difference]: With dead ends: 113 [2018-10-03 09:00:09,020 INFO L226 Difference]: Without dead ends: 110 [2018-10-03 09:00:09,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 09:00:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-03 09:00:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-03 09:00:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-03 09:00:09,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-10-03 09:00:09,027 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2018-10-03 09:00:09,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:09,028 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-10-03 09:00:09,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 09:00:09,028 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-10-03 09:00:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-03 09:00:09,028 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:09,028 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1] [2018-10-03 09:00:09,028 INFO L423 AbstractCegarLoop]: === Iteration 157 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:09,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:09,028 INFO L82 PathProgramCache]: Analyzing trace with hash 422283335, now seen corresponding path program 154 times [2018-10-03 09:00:09,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:09,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:09,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:09,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:09,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:10,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:10,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:10,439 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:00:10,508 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:00:10,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:10,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:10,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:10,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 09:00:10,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 09:00:10,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 09:00:10,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 09:00:10,560 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 55 states. [2018-10-03 09:00:13,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:13,906 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2018-10-03 09:00:13,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 09:00:13,906 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 109 [2018-10-03 09:00:13,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:13,907 INFO L225 Difference]: With dead ends: 167 [2018-10-03 09:00:13,907 INFO L226 Difference]: Without dead ends: 164 [2018-10-03 09:00:13,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 09:00:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-03 09:00:13,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2018-10-03 09:00:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-03 09:00:13,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-03 09:00:13,914 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2018-10-03 09:00:13,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:13,914 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-03 09:00:13,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 09:00:13,914 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-03 09:00:13,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 09:00:13,914 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:13,914 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-10-03 09:00:13,914 INFO L423 AbstractCegarLoop]: === Iteration 158 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:13,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:13,915 INFO L82 PathProgramCache]: Analyzing trace with hash 205819975, now seen corresponding path program 155 times [2018-10-03 09:00:13,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:13,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:13,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:13,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:13,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:14,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:14,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:14,958 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:00:15,048 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-03 09:00:15,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:15,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:15,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:15,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 09:00:15,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 09:00:15,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 09:00:15,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 09:00:15,106 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2018-10-03 09:00:15,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:15,970 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-10-03 09:00:15,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 09:00:15,970 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-03 09:00:15,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:15,971 INFO L225 Difference]: With dead ends: 168 [2018-10-03 09:00:15,971 INFO L226 Difference]: Without dead ends: 111 [2018-10-03 09:00:15,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 09:00:15,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-03 09:00:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-03 09:00:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-03 09:00:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-03 09:00:15,979 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 110 [2018-10-03 09:00:15,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:15,979 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-03 09:00:15,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 09:00:15,979 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-03 09:00:15,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 09:00:15,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:15,979 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-10-03 09:00:15,979 INFO L423 AbstractCegarLoop]: === Iteration 159 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:15,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:15,980 INFO L82 PathProgramCache]: Analyzing trace with hash 734591725, now seen corresponding path program 156 times [2018-10-03 09:00:15,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:15,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:15,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:15,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:15,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:17,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:17,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:17,737 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:00:17,819 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-03 09:00:17,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:17,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:17,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:17,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 09:00:17,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 09:00:17,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 09:00:17,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 09:00:17,861 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-10-03 09:00:18,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:18,038 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-10-03 09:00:18,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 09:00:18,038 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-03 09:00:18,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:18,039 INFO L225 Difference]: With dead ends: 115 [2018-10-03 09:00:18,039 INFO L226 Difference]: Without dead ends: 112 [2018-10-03 09:00:18,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 09:00:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-03 09:00:18,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-03 09:00:18,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-03 09:00:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-10-03 09:00:18,046 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 110 [2018-10-03 09:00:18,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:18,046 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-10-03 09:00:18,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 09:00:18,047 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-10-03 09:00:18,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-03 09:00:18,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:18,047 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1] [2018-10-03 09:00:18,047 INFO L423 AbstractCegarLoop]: === Iteration 160 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:18,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:18,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1297445473, now seen corresponding path program 157 times [2018-10-03 09:00:18,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:18,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:18,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:18,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:18,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:19,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:19,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:19,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:00:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:19,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:19,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:19,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 09:00:19,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 09:00:19,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 09:00:19,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 09:00:19,624 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 56 states. [2018-10-03 09:00:23,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:23,095 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-03 09:00:23,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 09:00:23,095 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 111 [2018-10-03 09:00:23,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:23,096 INFO L225 Difference]: With dead ends: 170 [2018-10-03 09:00:23,096 INFO L226 Difference]: Without dead ends: 167 [2018-10-03 09:00:23,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 09:00:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-03 09:00:23,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2018-10-03 09:00:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-03 09:00:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2018-10-03 09:00:23,105 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2018-10-03 09:00:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:23,105 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2018-10-03 09:00:23,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 09:00:23,105 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2018-10-03 09:00:23,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-03 09:00:23,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:23,106 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-10-03 09:00:23,106 INFO L423 AbstractCegarLoop]: === Iteration 161 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:23,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:23,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1566042477, now seen corresponding path program 158 times [2018-10-03 09:00:23,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:23,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:23,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:23,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:00:23,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:24,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:24,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:24,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:00:24,247 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:00:24,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:24,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:24,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:24,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-03 09:00:24,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 09:00:24,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 09:00:24,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 09:00:24,292 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2018-10-03 09:00:24,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:24,826 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-10-03 09:00:24,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 09:00:24,826 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-03 09:00:24,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:24,827 INFO L225 Difference]: With dead ends: 171 [2018-10-03 09:00:24,827 INFO L226 Difference]: Without dead ends: 113 [2018-10-03 09:00:24,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 09:00:24,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-03 09:00:24,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-03 09:00:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-03 09:00:24,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-03 09:00:24,835 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 112 [2018-10-03 09:00:24,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:24,835 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-03 09:00:24,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 09:00:24,835 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-03 09:00:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-03 09:00:24,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:24,835 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-10-03 09:00:24,836 INFO L423 AbstractCegarLoop]: === Iteration 162 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:24,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:24,836 INFO L82 PathProgramCache]: Analyzing trace with hash 778097543, now seen corresponding path program 159 times [2018-10-03 09:00:24,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:24,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:24,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:24,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:24,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:25,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:25,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:25,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:00:26,062 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-03 09:00:26,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:26,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:26,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:26,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-03 09:00:26,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 09:00:26,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 09:00:26,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 09:00:26,108 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 57 states. [2018-10-03 09:00:26,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:26,274 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-03 09:00:26,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 09:00:26,275 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-03 09:00:26,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:26,275 INFO L225 Difference]: With dead ends: 117 [2018-10-03 09:00:26,276 INFO L226 Difference]: Without dead ends: 114 [2018-10-03 09:00:26,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 09:00:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-03 09:00:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-03 09:00:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-03 09:00:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-10-03 09:00:26,284 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2018-10-03 09:00:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:26,285 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-10-03 09:00:26,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 09:00:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-10-03 09:00:26,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-03 09:00:26,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:26,285 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1] [2018-10-03 09:00:26,286 INFO L423 AbstractCegarLoop]: === Iteration 163 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:26,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:26,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1648841465, now seen corresponding path program 160 times [2018-10-03 09:00:26,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:26,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:26,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:26,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:26,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:27,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:27,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:27,819 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:00:27,887 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:00:27,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:27,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:27,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:27,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 09:00:27,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 09:00:27,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 09:00:27,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 09:00:27,940 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 57 states. [2018-10-03 09:00:31,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:31,530 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-10-03 09:00:31,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 09:00:31,531 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 113 [2018-10-03 09:00:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:31,531 INFO L225 Difference]: With dead ends: 173 [2018-10-03 09:00:31,531 INFO L226 Difference]: Without dead ends: 170 [2018-10-03 09:00:31,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 09:00:31,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-03 09:00:31,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2018-10-03 09:00:31,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-03 09:00:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-10-03 09:00:31,542 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2018-10-03 09:00:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:31,542 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-10-03 09:00:31,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 09:00:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-10-03 09:00:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-03 09:00:31,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:31,543 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-10-03 09:00:31,543 INFO L423 AbstractCegarLoop]: === Iteration 164 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:31,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:31,543 INFO L82 PathProgramCache]: Analyzing trace with hash 425460615, now seen corresponding path program 161 times [2018-10-03 09:00:31,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:31,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:31,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:31,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:31,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:32,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:32,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:32,653 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:00:32,749 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2018-10-03 09:00:32,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:32,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:32,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:32,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 09:00:32,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 09:00:32,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 09:00:32,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 09:00:32,794 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 58 states. [2018-10-03 09:00:33,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:33,158 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2018-10-03 09:00:33,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 09:00:33,158 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-03 09:00:33,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:33,159 INFO L225 Difference]: With dead ends: 174 [2018-10-03 09:00:33,159 INFO L226 Difference]: Without dead ends: 115 [2018-10-03 09:00:33,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 09:00:33,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-03 09:00:33,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-03 09:00:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-03 09:00:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-03 09:00:33,167 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 114 [2018-10-03 09:00:33,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:33,167 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-03 09:00:33,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 09:00:33,168 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-03 09:00:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-03 09:00:33,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:33,168 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-10-03 09:00:33,168 INFO L423 AbstractCegarLoop]: === Iteration 165 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:33,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:33,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1768971437, now seen corresponding path program 162 times [2018-10-03 09:00:33,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:33,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:33,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:33,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:33,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:34,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:34,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:34,371 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:00:34,458 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-03 09:00:34,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:34,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:34,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:34,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 09:00:34,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 09:00:34,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 09:00:34,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 09:00:34,500 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-10-03 09:00:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:34,683 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2018-10-03 09:00:34,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 09:00:34,684 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-03 09:00:34,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:34,684 INFO L225 Difference]: With dead ends: 119 [2018-10-03 09:00:34,684 INFO L226 Difference]: Without dead ends: 116 [2018-10-03 09:00:34,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 09:00:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-03 09:00:34,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-03 09:00:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-03 09:00:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-10-03 09:00:34,691 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 114 [2018-10-03 09:00:34,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:34,692 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-10-03 09:00:34,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 09:00:34,692 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-10-03 09:00:34,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-03 09:00:34,692 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:34,692 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1] [2018-10-03 09:00:34,692 INFO L423 AbstractCegarLoop]: === Iteration 166 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:34,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:34,692 INFO L82 PathProgramCache]: Analyzing trace with hash -996521823, now seen corresponding path program 163 times [2018-10-03 09:00:34,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:34,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:34,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:34,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:34,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:36,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:36,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:36,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:00:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:36,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:36,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:36,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-03 09:00:36,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 09:00:36,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 09:00:36,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 09:00:36,372 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 58 states. [2018-10-03 09:00:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:40,128 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-03 09:00:40,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 09:00:40,129 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 115 [2018-10-03 09:00:40,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:40,129 INFO L225 Difference]: With dead ends: 176 [2018-10-03 09:00:40,129 INFO L226 Difference]: Without dead ends: 173 [2018-10-03 09:00:40,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 09:00:40,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-03 09:00:40,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2018-10-03 09:00:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-03 09:00:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-10-03 09:00:40,137 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2018-10-03 09:00:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:40,137 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-10-03 09:00:40,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 09:00:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-10-03 09:00:40,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-03 09:00:40,138 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:40,138 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-10-03 09:00:40,138 INFO L423 AbstractCegarLoop]: === Iteration 167 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:40,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:40,138 INFO L82 PathProgramCache]: Analyzing trace with hash -827466963, now seen corresponding path program 164 times [2018-10-03 09:00:40,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:40,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:40,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:40,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:00:40,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:41,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:41,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:41,292 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:00:41,359 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:00:41,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:41,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:41,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:41,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-03 09:00:41,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 09:00:41,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 09:00:41,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 09:00:41,404 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 59 states. [2018-10-03 09:00:41,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:41,969 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2018-10-03 09:00:41,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 09:00:41,969 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-03 09:00:41,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:41,970 INFO L225 Difference]: With dead ends: 177 [2018-10-03 09:00:41,970 INFO L226 Difference]: Without dead ends: 117 [2018-10-03 09:00:41,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 09:00:41,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-03 09:00:41,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-03 09:00:41,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-03 09:00:41,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-03 09:00:41,981 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 116 [2018-10-03 09:00:41,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:41,981 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-03 09:00:41,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 09:00:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-03 09:00:41,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-03 09:00:41,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:41,982 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-10-03 09:00:41,982 INFO L423 AbstractCegarLoop]: === Iteration 168 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:41,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:41,982 INFO L82 PathProgramCache]: Analyzing trace with hash -2128304441, now seen corresponding path program 165 times [2018-10-03 09:00:41,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:41,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:41,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:41,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:41,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:43,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:43,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:43,225 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:00:43,321 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-10-03 09:00:43,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:43,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:43,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:43,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-03 09:00:43,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 09:00:43,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 09:00:43,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 09:00:43,366 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 59 states. [2018-10-03 09:00:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:43,561 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-03 09:00:43,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 09:00:43,562 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-03 09:00:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:43,562 INFO L225 Difference]: With dead ends: 121 [2018-10-03 09:00:43,563 INFO L226 Difference]: Without dead ends: 118 [2018-10-03 09:00:43,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 09:00:43,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-03 09:00:43,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-03 09:00:43,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-03 09:00:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-10-03 09:00:43,571 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2018-10-03 09:00:43,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:43,571 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-10-03 09:00:43,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 09:00:43,571 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-10-03 09:00:43,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-03 09:00:43,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:43,572 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1] [2018-10-03 09:00:43,572 INFO L423 AbstractCegarLoop]: === Iteration 169 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:43,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:43,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1552989753, now seen corresponding path program 166 times [2018-10-03 09:00:43,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:43,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:43,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:43,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:43,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:45,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:45,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:45,153 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:00:45,225 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:00:45,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:45,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:45,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:45,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 09:00:45,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 09:00:45,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 09:00:45,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 09:00:45,280 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 59 states. Received shutdown request... [2018-10-03 09:00:46,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 09:00:46,033 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 09:00:46,038 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 09:00:46,039 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 09:00:46 BoogieIcfgContainer [2018-10-03 09:00:46,039 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 09:00:46,039 INFO L168 Benchmark]: Toolchain (without parser) took 232151.33 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -184.0 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 327.4 MB). Peak memory consumption was 143.3 MB. Max. memory is 7.1 GB. [2018-10-03 09:00:46,041 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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. [2018-10-03 09:00:46,041 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:00:46,041 INFO L168 Benchmark]: Boogie Preprocessor took 27.75 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. [2018-10-03 09:00:46,042 INFO L168 Benchmark]: RCFGBuilder took 242.10 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. [2018-10-03 09:00:46,042 INFO L168 Benchmark]: TraceAbstraction took 231829.80 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -184.0 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 306.2 MB). Peak memory consumption was 122.2 MB. Max. memory is 7.1 GB. [2018-10-03 09:00:46,044 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 0.20 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 45.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.75 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 242.10 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 231829.80 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -184.0 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 306.2 MB). Peak memory consumption was 122.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was constructing difference of abstraction (118states) and FLOYD_HOARE automaton (currently 25 states, 59 states before enhancement), while ReachableStatesComputation was computing reachable states (23 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 23). Cancelled while BasicCegarLoop was constructing difference of abstraction (118states) and FLOYD_HOARE automaton (currently 25 states, 59 states before enhancement), while ReachableStatesComputation was computing reachable states (23 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. TIMEOUT Result, 231.7s OverallTime, 169 OverallIterations, 56 TraceHistogramMax, 104.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 676 SDtfs, 1559 SDslu, 6084 SDs, 0 SdLazy, 155850 SolverSat, 1935 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 84.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19869 GetRequests, 14801 SyntacticMatches, 112 SemanticMatches, 4956 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 103.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=166, 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: 0.8s AutomataMinimizationTime, 168 MinimizatonAttempts, 1540 StatesRemovedByMinimization, 55 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 8.7s SatisfiabilityAnalysisTime, 109.6s InterpolantComputationTime, 20599 NumberOfCodeBlocks, 20599 NumberOfCodeBlocksAsserted, 1579 NumberOfCheckSat, 20264 ConstructedInterpolants, 0 QuantifiedInterpolants, 6820284 SizeOfPredicates, 110 NumberOfNonLiveVariables, 44571 ConjunctsInSsa, 13042 ConjunctsInUnsatCore, 335 InterpolantComputations, 3 PerfectInterpolantSequences, 123421/363885 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/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_09-00-46-053.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_09-00-46-053.csv Completed graceful shutdown