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 0.1.23-1cc990c [2018-09-30 20:28:10,754 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:28:10,756 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:28:10,774 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:28:10,774 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:28:10,776 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:28:10,778 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:28:10,780 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:28:10,783 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:28:10,784 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:28:10,785 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:28:10,831 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 20:28:10,849 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:28:10,849 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:28:10,850 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:28:10,850 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:28:10,852 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:28:10,852 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:28:10,853 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:28:10,853 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:28:10,854 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:28:10,854 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:28:10,854 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:28:10,854 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:28:10,854 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:28:10,855 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:28:10,855 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:28:10,855 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:28:10,855 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:28:10,855 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:28:10,856 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:28:10,856 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:28:10,856 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:28:10,856 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:28:10,858 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:28:10,858 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:28:10,858 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:28:10,859 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:28:10,859 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:28:10,859 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:28:10,859 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:28:10,860 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:28:10,915 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:28:10,929 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:28:10,932 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:28:10,934 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:28:10,935 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:28:10,936 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl [2018-09-30 20:28:10,936 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl' [2018-09-30 20:28:10,989 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:28:10,992 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:28:10,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:28:10,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:28:10,993 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:28:11,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:10" (1/1) ... [2018-09-30 20:28:11,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:10" (1/1) ... [2018-09-30 20:28:11,031 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 20:28:11,032 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 20:28:11,032 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 20:28:11,034 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:28:11,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:28:11,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:28:11,035 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:28:11,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:10" (1/1) ... [2018-09-30 20:28:11,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:10" (1/1) ... [2018-09-30 20:28:11,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:10" (1/1) ... [2018-09-30 20:28:11,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:10" (1/1) ... [2018-09-30 20:28:11,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:10" (1/1) ... [2018-09-30 20:28:11,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:10" (1/1) ... [2018-09-30 20:28:11,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:10" (1/1) ... [2018-09-30 20:28:11,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:28:11,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:28:11,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:28:11,058 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:28:11,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:28:11,137 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2018-09-30 20:28:11,137 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2018-09-30 20:28:11,317 INFO L345 CfgBuilder]: Using library mode [2018-09-30 20:28:11,317 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:28:11 BoogieIcfgContainer [2018-09-30 20:28:11,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:28:11,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:28:11,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:28:11,322 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:28:11,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:10" (1/2) ... [2018-09-30 20:28:11,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29612d5f and model type doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:28:11, skipping insertion in model container [2018-09-30 20:28:11,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:28:11" (2/2) ... [2018-09-30 20:28:11,326 INFO L112 eAbstractionObserver]: Analyzing ICFG doubleLoopUniformIterations.bpl [2018-09-30 20:28:11,335 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:28:11,343 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-09-30 20:28:11,398 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:28:11,398 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:28:11,399 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:28:11,399 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:28:11,399 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:28:11,399 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:28:11,399 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:28:11,400 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:28:11,400 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:28:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-30 20:28:11,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:28:11,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:11,419 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:28:11,421 INFO L423 AbstractCegarLoop]: === Iteration 1 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:11,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:11,427 INFO L82 PathProgramCache]: Analyzing trace with hash 926725, now seen corresponding path program 1 times [2018-09-30 20:28:11,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:11,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:11,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:11,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:11,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:11,560 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:28:11,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 20:28:11,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:28:11,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:28:11,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:28:11,580 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-09-30 20:28:11,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:11,665 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-09-30 20:28:11,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:28:11,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 20:28:11,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:11,684 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:28:11,684 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 20:28:11,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:28:11,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 20:28:11,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 20:28:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:28:11,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-30 20:28:11,737 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2018-09-30 20:28:11,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:11,737 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-30 20:28:11,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:28:11,737 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-30 20:28:11,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:28:11,738 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:11,738 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 20:28:11,739 INFO L423 AbstractCegarLoop]: === Iteration 2 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:11,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:11,739 INFO L82 PathProgramCache]: Analyzing trace with hash 28728519, now seen corresponding path program 1 times [2018-09-30 20:28:11,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:11,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:11,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:11,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:11,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:11,791 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:28:11,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 20:28:11,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:28:11,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:28:11,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:28:11,793 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2018-09-30 20:28:11,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:11,827 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 20:28:11,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:28:11,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-30 20:28:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:11,829 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:28:11,829 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:28:11,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:28:11,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:28:11,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:28:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:28:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-09-30 20:28:11,839 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-09-30 20:28:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:11,840 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-09-30 20:28:11,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:28:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-09-30 20:28:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:28:11,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:11,841 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 20:28:11,841 INFO L423 AbstractCegarLoop]: === Iteration 3 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:11,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:11,845 INFO L82 PathProgramCache]: Analyzing trace with hash 891297133, now seen corresponding path program 1 times [2018-09-30 20:28:11,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:11,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:11,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:11,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:11,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:11,913 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:28:11,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:28:11,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:28:11,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:28:11,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:28:11,915 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-09-30 20:28:11,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:11,978 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 20:28:11,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:28:11,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 20:28:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:11,980 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:28:11,980 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 20:28:11,982 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 [2018-09-30 20:28:11,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 20:28:11,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 20:28:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:28:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-09-30 20:28:11,985 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-09-30 20:28:11,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:11,986 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-09-30 20:28:11,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:28:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-09-30 20:28:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:28:11,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:11,987 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:28:11,987 INFO L423 AbstractCegarLoop]: === Iteration 4 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:11,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:11,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1860345825, now seen corresponding path program 1 times [2018-09-30 20:28:11,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:11,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:11,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:11,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:11,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:12,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:12,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:12,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:12,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:12,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:12,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-30 20:28:12,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:28:12,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:28:12,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:28:12,270 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-09-30 20:28:12,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:12,444 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-09-30 20:28:12,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:28:12,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-09-30 20:28:12,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:12,446 INFO L225 Difference]: With dead ends: 14 [2018-09-30 20:28:12,446 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:28:12,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:28:12,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:28:12,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-09-30 20:28:12,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:28:12,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-30 20:28:12,450 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-09-30 20:28:12,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:12,450 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-30 20:28:12,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:28:12,451 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-30 20:28:12,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:28:12,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:12,452 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:28:12,452 INFO L423 AbstractCegarLoop]: === Iteration 5 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:12,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:12,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1836084205, now seen corresponding path program 2 times [2018-09-30 20:28:12,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:12,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:12,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:12,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:12,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:12,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:12,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:12,656 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:12,685 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:12,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:12,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:12,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:12,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:28:12,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:28:12,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:28:12,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:28:12,722 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2018-09-30 20:28:12,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:12,815 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-09-30 20:28:12,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:28:12,816 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 20:28:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:12,816 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:28:12,817 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 20:28:12,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:28:12,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 20:28:12,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 20:28:12,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:28:12,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-30 20:28:12,821 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2018-09-30 20:28:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:12,821 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-30 20:28:12,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:28:12,822 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-30 20:28:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:28:12,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:12,822 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:28:12,823 INFO L423 AbstractCegarLoop]: === Iteration 6 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:12,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:12,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1860095751, now seen corresponding path program 3 times [2018-09-30 20:28:12,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:12,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:12,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:12,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:12,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:13,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:13,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:13,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:13,082 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-09-30 20:28:13,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:13,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:13,121 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:13,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:28:13,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:28:13,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:28:13,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:28:13,122 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-30 20:28:13,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:13,208 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-30 20:28:13,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:28:13,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 20:28:13,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:13,209 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:28:13,210 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:28:13,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:28:13,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:28:13,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 20:28:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:28:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-09-30 20:28:13,213 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-09-30 20:28:13,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:13,214 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-09-30 20:28:13,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:28:13,214 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-09-30 20:28:13,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:28:13,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:13,215 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2018-09-30 20:28:13,215 INFO L423 AbstractCegarLoop]: === Iteration 7 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:13,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:13,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1828331911, now seen corresponding path program 4 times [2018-09-30 20:28:13,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:13,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:13,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:13,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:13,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:13,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:13,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:13,349 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:13,374 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:13,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:13,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:13,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:13,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 20:28:13,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:28:13,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:28:13,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:28:13,408 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2018-09-30 20:28:13,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:13,541 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-09-30 20:28:13,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:28:13,543 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-09-30 20:28:13,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:13,543 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:28:13,544 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 20:28:13,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:28:13,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 20:28:13,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2018-09-30 20:28:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:28:13,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-30 20:28:13,553 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-30 20:28:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:13,553 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-30 20:28:13,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:28:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-30 20:28:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:28:13,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:13,554 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-09-30 20:28:13,554 INFO L423 AbstractCegarLoop]: === Iteration 8 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:13,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:13,555 INFO L82 PathProgramCache]: Analyzing trace with hash 843652871, now seen corresponding path program 5 times [2018-09-30 20:28:13,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:13,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:13,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:13,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:13,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:13,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:13,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:13,654 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:13,664 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-09-30 20:28:13,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:13,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:13,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:13,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:28:13,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:28:13,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:28:13,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:28:13,705 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2018-09-30 20:28:13,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:13,738 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-09-30 20:28:13,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:28:13,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 20:28:13,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:13,740 INFO L225 Difference]: With dead ends: 18 [2018-09-30 20:28:13,740 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:28:13,741 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 [2018-09-30 20:28:13,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:28:13,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:28:13,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:28:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-30 20:28:13,744 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-09-30 20:28:13,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:13,745 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-30 20:28:13,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:28:13,745 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-30 20:28:13,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:28:13,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:13,746 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-09-30 20:28:13,746 INFO L423 AbstractCegarLoop]: === Iteration 9 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:13,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:13,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1588010797, now seen corresponding path program 6 times [2018-09-30 20:28:13,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:13,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:13,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:13,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:13,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:13,826 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:13,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:13,835 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:13,844 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-09-30 20:28:13,844 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:13,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:13,874 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:13,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:28:13,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:28:13,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:28:13,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:28:13,875 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-09-30 20:28:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:13,912 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-09-30 20:28:13,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:28:13,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 20:28:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:13,914 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:28:13,914 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 20:28:13,914 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 [2018-09-30 20:28:13,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 20:28:13,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 20:28:13,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:28:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-09-30 20:28:13,917 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-09-30 20:28:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:13,918 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-09-30 20:28:13,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:28:13,918 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-09-30 20:28:13,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:28:13,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:13,919 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2018-09-30 20:28:13,919 INFO L423 AbstractCegarLoop]: === Iteration 10 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:13,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:13,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1983632929, now seen corresponding path program 7 times [2018-09-30 20:28:13,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:13,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:13,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:13,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:13,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:14,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:14,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:14,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:14,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:14,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:14,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:28:14,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:28:14,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:28:14,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:28:14,182 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2018-09-30 20:28:14,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:14,449 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-30 20:28:14,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:28:14,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-09-30 20:28:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:14,450 INFO L225 Difference]: With dead ends: 20 [2018-09-30 20:28:14,450 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:28:14,451 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 [2018-09-30 20:28:14,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:28:14,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-30 20:28:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:28:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-30 20:28:14,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-09-30 20:28:14,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:14,455 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-30 20:28:14,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:28:14,456 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-30 20:28:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:28:14,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:14,456 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-09-30 20:28:14,456 INFO L423 AbstractCegarLoop]: === Iteration 11 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:14,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:14,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1363017133, now seen corresponding path program 8 times [2018-09-30 20:28:14,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:14,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:14,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:14,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:14,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:14,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:14,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:14,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:14,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:14,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:14,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:14,718 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:14,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:28:14,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:28:14,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:28:14,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:28:14,719 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2018-09-30 20:28:14,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:14,764 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-09-30 20:28:14,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:28:14,764 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 20:28:14,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:14,765 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:28:14,765 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:28:14,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:28:14,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:28:14,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:28:14,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:28:14,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-30 20:28:14,768 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2018-09-30 20:28:14,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:14,769 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-30 20:28:14,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:28:14,769 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-30 20:28:14,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:28:14,769 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:14,770 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-09-30 20:28:14,770 INFO L423 AbstractCegarLoop]: === Iteration 12 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:14,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:14,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1331690937, now seen corresponding path program 9 times [2018-09-30 20:28:14,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:14,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:14,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:14,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:14,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:14,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:14,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:14,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:14,877 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 20:28:14,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:14,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:14,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:14,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:28:14,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:28:14,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:28:14,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:28:14,910 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-09-30 20:28:14,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:14,954 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-30 20:28:14,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:28:14,955 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 20:28:14,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:14,956 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:28:14,956 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 20:28:14,956 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 [2018-09-30 20:28:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 20:28:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 20:28:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:28:14,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-09-30 20:28:14,959 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-09-30 20:28:14,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:14,960 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-09-30 20:28:14,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:28:14,960 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-09-30 20:28:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:28:14,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:14,961 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2018-09-30 20:28:14,961 INFO L423 AbstractCegarLoop]: === Iteration 13 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:14,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:14,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1667192391, now seen corresponding path program 10 times [2018-09-30 20:28:14,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:14,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:14,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:14,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:14,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:15,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:15,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:15,134 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:15,149 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:15,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:15,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:15,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:15,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:28:15,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:28:15,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:28:15,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:28:15,186 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-09-30 20:28:15,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:15,286 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-09-30 20:28:15,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:28:15,286 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-09-30 20:28:15,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:15,287 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:28:15,287 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:28:15,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:28:15,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:28:15,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2018-09-30 20:28:15,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:28:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-30 20:28:15,292 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-09-30 20:28:15,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:15,293 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-30 20:28:15,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:28:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-30 20:28:15,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:28:15,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:15,294 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-09-30 20:28:15,294 INFO L423 AbstractCegarLoop]: === Iteration 14 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:15,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:15,294 INFO L82 PathProgramCache]: Analyzing trace with hash 143295047, now seen corresponding path program 11 times [2018-09-30 20:28:15,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:15,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:15,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:15,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:15,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:15,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:15,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:15,410 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:15,443 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 20:28:15,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:15,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:15,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:15,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:28:15,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:28:15,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:28:15,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:28:15,479 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2018-09-30 20:28:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:15,534 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-09-30 20:28:15,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:28:15,535 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 20:28:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:15,535 INFO L225 Difference]: With dead ends: 24 [2018-09-30 20:28:15,535 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:28:15,536 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 [2018-09-30 20:28:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:28:15,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:28:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:28:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-30 20:28:15,539 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-09-30 20:28:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:15,540 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-30 20:28:15,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:28:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-30 20:28:15,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:28:15,540 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:15,541 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-09-30 20:28:15,541 INFO L423 AbstractCegarLoop]: === Iteration 15 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:15,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:15,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1788276499, now seen corresponding path program 12 times [2018-09-30 20:28:15,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:15,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:15,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:15,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:15,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:15,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:15,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:15,675 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:15,692 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 20:28:15,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:15,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:15,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:15,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:28:15,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:28:15,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:28:15,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:28:15,722 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-09-30 20:28:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:15,762 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-09-30 20:28:15,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:28:15,763 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 20:28:15,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:15,764 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:28:15,764 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:28:15,765 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 [2018-09-30 20:28:15,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:28:15,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 20:28:15,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:28:15,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-09-30 20:28:15,768 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2018-09-30 20:28:15,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:15,769 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-09-30 20:28:15,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:28:15,769 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-09-30 20:28:15,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:28:15,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:15,770 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2018-09-30 20:28:15,770 INFO L423 AbstractCegarLoop]: === Iteration 16 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:15,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:15,770 INFO L82 PathProgramCache]: Analyzing trace with hash 397941857, now seen corresponding path program 13 times [2018-09-30 20:28:15,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:15,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:15,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:15,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:15,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:15,950 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:15,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:15,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:15,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:16,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:16,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:28:16,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:28:16,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:28:16,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:28:16,030 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-09-30 20:28:16,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:16,168 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-30 20:28:16,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:28:16,168 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-09-30 20:28:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:16,169 INFO L225 Difference]: With dead ends: 26 [2018-09-30 20:28:16,169 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:28:16,170 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 [2018-09-30 20:28:16,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:28:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-30 20:28:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:28:16,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-09-30 20:28:16,176 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2018-09-30 20:28:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:16,177 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-09-30 20:28:16,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:28:16,177 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-09-30 20:28:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:28:16,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:16,178 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-09-30 20:28:16,178 INFO L423 AbstractCegarLoop]: === Iteration 17 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:16,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:16,178 INFO L82 PathProgramCache]: Analyzing trace with hash -548765843, now seen corresponding path program 14 times [2018-09-30 20:28:16,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:16,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:16,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:16,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:16,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:16,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:16,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:16,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:16,279 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:16,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:16,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:16,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:16,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:28:16,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:28:16,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:28:16,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:28:16,315 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2018-09-30 20:28:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:16,378 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-09-30 20:28:16,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:28:16,379 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 20:28:16,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:16,379 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:28:16,380 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:28:16,381 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 [2018-09-30 20:28:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:28:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 20:28:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:28:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-30 20:28:16,384 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2018-09-30 20:28:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:16,384 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-30 20:28:16,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:28:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-30 20:28:16,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:28:16,385 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:16,385 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-09-30 20:28:16,386 INFO L423 AbstractCegarLoop]: === Iteration 18 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:16,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:16,386 INFO L82 PathProgramCache]: Analyzing trace with hash -297941625, now seen corresponding path program 15 times [2018-09-30 20:28:16,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:16,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:16,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:16,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:16,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:16,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:16,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:16,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:16,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:28:16,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:16,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:16,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:16,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:28:16,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:28:16,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:28:16,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:28:16,559 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-30 20:28:16,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:16,602 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-30 20:28:16,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:28:16,602 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 20:28:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:16,603 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:28:16,603 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 20:28:16,604 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 [2018-09-30 20:28:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 20:28:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 20:28:16,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:28:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-09-30 20:28:16,608 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2018-09-30 20:28:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:16,608 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-09-30 20:28:16,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:28:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-09-30 20:28:16,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:28:16,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:16,609 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2018-09-30 20:28:16,610 INFO L423 AbstractCegarLoop]: === Iteration 19 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:16,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:16,610 INFO L82 PathProgramCache]: Analyzing trace with hash -646317305, now seen corresponding path program 16 times [2018-09-30 20:28:16,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:16,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:16,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:16,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:16,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:16,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:16,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:16,751 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:16,780 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:16,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:16,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:16,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:16,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:28:16,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:28:16,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:28:16,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:28:16,881 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2018-09-30 20:28:17,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:17,144 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-09-30 20:28:17,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:28:17,144 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-09-30 20:28:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:17,145 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:28:17,145 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:28:17,146 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 [2018-09-30 20:28:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:28:17,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-09-30 20:28:17,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:28:17,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-30 20:28:17,151 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-09-30 20:28:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:17,151 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-30 20:28:17,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:28:17,152 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-30 20:28:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:28:17,152 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:17,152 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-09-30 20:28:17,153 INFO L423 AbstractCegarLoop]: === Iteration 20 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:17,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:17,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1438938503, now seen corresponding path program 17 times [2018-09-30 20:28:17,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:17,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:17,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:17,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:17,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:17,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:17,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:17,282 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:17,302 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-30 20:28:17,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:17,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:17,312 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:17,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:17,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:28:17,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:28:17,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:28:17,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:28:17,333 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-09-30 20:28:17,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:17,436 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-09-30 20:28:17,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:28:17,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 20:28:17,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:17,436 INFO L225 Difference]: With dead ends: 30 [2018-09-30 20:28:17,437 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:28:17,437 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 [2018-09-30 20:28:17,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:28:17,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:28:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:28:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-30 20:28:17,440 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2018-09-30 20:28:17,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:17,440 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-30 20:28:17,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:28:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-30 20:28:17,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:28:17,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:17,441 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-09-30 20:28:17,441 INFO L423 AbstractCegarLoop]: === Iteration 21 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:17,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:17,442 INFO L82 PathProgramCache]: Analyzing trace with hash 624554669, now seen corresponding path program 18 times [2018-09-30 20:28:17,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:17,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:17,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:17,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:17,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:17,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:17,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:17,572 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:17,584 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 20:28:17,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:17,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:17,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:17,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:28:17,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:28:17,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:28:17,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:28:17,617 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-09-30 20:28:17,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:17,659 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-09-30 20:28:17,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:28:17,659 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 20:28:17,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:17,660 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:28:17,660 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:28:17,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:28:17,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:28:17,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 20:28:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:28:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-09-30 20:28:17,665 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2018-09-30 20:28:17,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:17,665 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-09-30 20:28:17,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:28:17,665 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-09-30 20:28:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:17,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:17,666 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2018-09-30 20:28:17,666 INFO L423 AbstractCegarLoop]: === Iteration 22 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:17,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:17,666 INFO L82 PathProgramCache]: Analyzing trace with hash -2113703263, now seen corresponding path program 19 times [2018-09-30 20:28:17,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:17,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:17,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:17,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:17,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:17,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:17,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:17,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:17,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:17,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:17,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:28:17,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:28:17,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:28:17,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:28:17,985 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2018-09-30 20:28:18,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:18,334 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-30 20:28:18,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:28:18,336 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-09-30 20:28:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:18,337 INFO L225 Difference]: With dead ends: 32 [2018-09-30 20:28:18,337 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:28:18,337 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 [2018-09-30 20:28:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:28:18,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-09-30 20:28:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:28:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-09-30 20:28:18,341 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2018-09-30 20:28:18,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:18,342 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-09-30 20:28:18,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:28:18,342 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-09-30 20:28:18,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:28:18,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:18,343 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-09-30 20:28:18,343 INFO L423 AbstractCegarLoop]: === Iteration 23 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:18,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:18,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1100353235, now seen corresponding path program 20 times [2018-09-30 20:28:18,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:18,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:18,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:18,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:18,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:18,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:18,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:18,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:18,713 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:18,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:18,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:18,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:18,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:18,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:18,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:18,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:18,775 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2018-09-30 20:28:18,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:18,950 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-09-30 20:28:18,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:18,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 20:28:18,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:18,951 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:28:18,952 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:28:18,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:18,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:28:18,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:28:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:28:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-30 20:28:18,956 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-09-30 20:28:18,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:18,957 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-30 20:28:18,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:18,957 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-30 20:28:18,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:28:18,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:18,957 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-09-30 20:28:18,958 INFO L423 AbstractCegarLoop]: === Iteration 24 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:18,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:18,958 INFO L82 PathProgramCache]: Analyzing trace with hash -576448313, now seen corresponding path program 21 times [2018-09-30 20:28:18,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:18,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:18,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:18,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:18,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:19,089 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:19,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:19,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:19,128 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 20:28:19,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:19,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:19,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:19,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:19,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:19,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:19,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:19,171 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-09-30 20:28:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:19,231 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-30 20:28:19,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:19,231 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 20:28:19,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:19,232 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:28:19,232 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 20:28:19,233 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 [2018-09-30 20:28:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 20:28:19,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 20:28:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:28:19,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-09-30 20:28:19,237 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-09-30 20:28:19,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:19,237 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-09-30 20:28:19,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:19,237 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-09-30 20:28:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:28:19,238 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:19,238 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2018-09-30 20:28:19,238 INFO L423 AbstractCegarLoop]: === Iteration 25 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:19,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:19,238 INFO L82 PathProgramCache]: Analyzing trace with hash -690090041, now seen corresponding path program 22 times [2018-09-30 20:28:19,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:19,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:19,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:19,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:19,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:19,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:19,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:19,410 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:19,430 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:19,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:19,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:19,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:19,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:28:19,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:19,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:19,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:19,475 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2018-09-30 20:28:19,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:19,664 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-09-30 20:28:19,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:19,664 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2018-09-30 20:28:19,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:19,665 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:28:19,665 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:28:19,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:19,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:28:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2018-09-30 20:28:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:28:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-09-30 20:28:19,671 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2018-09-30 20:28:19,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:19,672 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-09-30 20:28:19,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:19,672 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-09-30 20:28:19,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:28:19,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:19,673 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-09-30 20:28:19,673 INFO L423 AbstractCegarLoop]: === Iteration 26 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:19,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:19,673 INFO L82 PathProgramCache]: Analyzing trace with hash 81983687, now seen corresponding path program 23 times [2018-09-30 20:28:19,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:19,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:19,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:19,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:19,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:20,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:20,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:20,500 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:20,587 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:28:20,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:20,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:20,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:20,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 20:28:20,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:28:20,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:28:20,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:28:20,642 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2018-09-30 20:28:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:20,711 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-09-30 20:28:20,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:28:20,712 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 20:28:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:20,712 INFO L225 Difference]: With dead ends: 36 [2018-09-30 20:28:20,712 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:28:20,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:28:20,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:28:20,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:28:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:28:20,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-30 20:28:20,717 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2018-09-30 20:28:20,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:20,717 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-30 20:28:20,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:28:20,718 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-30 20:28:20,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:28:20,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:20,718 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-09-30 20:28:20,718 INFO L423 AbstractCegarLoop]: === Iteration 27 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:20,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:20,719 INFO L82 PathProgramCache]: Analyzing trace with hash -856832915, now seen corresponding path program 24 times [2018-09-30 20:28:20,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:20,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:20,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:20,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:20,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:20,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:20,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:20,880 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:20,894 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 20:28:20,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:20,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:20,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:20,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 20:28:20,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:28:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:28:20,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:28:20,929 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-09-30 20:28:20,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:20,964 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-09-30 20:28:20,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:28:20,965 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 20:28:20,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:20,966 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:28:20,966 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 20:28:20,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:28:20,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 20:28:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 20:28:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:28:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-09-30 20:28:20,970 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-09-30 20:28:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:20,971 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-09-30 20:28:20,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:28:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-09-30 20:28:20,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:28:20,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:20,972 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2018-09-30 20:28:20,972 INFO L423 AbstractCegarLoop]: === Iteration 28 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:20,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:20,972 INFO L82 PathProgramCache]: Analyzing trace with hash -792078111, now seen corresponding path program 25 times [2018-09-30 20:28:20,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:20,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:20,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:20,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:20,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:21,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:21,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:21,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:21,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:21,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:21,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:21,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:28:21,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:28:21,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:28:21,416 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2018-09-30 20:28:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:21,596 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-30 20:28:21,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:28:21,597 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-09-30 20:28:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:21,598 INFO L225 Difference]: With dead ends: 38 [2018-09-30 20:28:21,598 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:28:21,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:28:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:28:21,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 20:28:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:28:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-30 20:28:21,602 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2018-09-30 20:28:21,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:21,602 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-30 20:28:21,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:28:21,602 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-30 20:28:21,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:28:21,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:21,603 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-09-30 20:28:21,603 INFO L423 AbstractCegarLoop]: === Iteration 29 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:21,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:21,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1215320813, now seen corresponding path program 26 times [2018-09-30 20:28:21,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:21,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:21,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:21,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:21,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:21,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:21,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:21,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:21,844 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:21,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:21,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:21,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:21,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 20:28:21,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:28:21,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:28:21,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:28:21,880 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2018-09-30 20:28:21,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:21,936 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-09-30 20:28:21,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:28:21,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 20:28:21,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:21,937 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:28:21,937 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:28:21,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:28:21,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:28:21,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 20:28:21,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:28:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-30 20:28:21,942 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2018-09-30 20:28:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:21,942 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-30 20:28:21,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:28:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-30 20:28:21,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:28:21,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:21,943 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-09-30 20:28:21,943 INFO L423 AbstractCegarLoop]: === Iteration 30 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:21,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:21,943 INFO L82 PathProgramCache]: Analyzing trace with hash -2118190073, now seen corresponding path program 27 times [2018-09-30 20:28:21,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:21,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:21,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:21,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:21,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:22,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:22,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:22,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:22,421 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 20:28:22,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:22,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:22,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:22,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 20:28:22,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:28:22,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:28:22,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:28:22,459 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2018-09-30 20:28:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:22,497 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-30 20:28:22,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:28:22,498 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 20:28:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:22,498 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:28:22,499 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:28:22,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:28:22,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:28:22,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 20:28:22,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:28:22,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-09-30 20:28:22,503 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2018-09-30 20:28:22,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:22,504 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-09-30 20:28:22,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:28:22,504 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-09-30 20:28:22,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 20:28:22,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:22,505 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2018-09-30 20:28:22,505 INFO L423 AbstractCegarLoop]: === Iteration 31 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:22,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:22,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1239444345, now seen corresponding path program 28 times [2018-09-30 20:28:22,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:22,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:22,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:22,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:22,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:22,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:22,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:22,771 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:22,785 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:22,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:22,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:22,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:22,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 20:28:22,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:28:22,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:28:22,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:28:22,817 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2018-09-30 20:28:23,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:23,013 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-09-30 20:28:23,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:28:23,014 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-09-30 20:28:23,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:23,014 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:28:23,014 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 20:28:23,015 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 [2018-09-30 20:28:23,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 20:28:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2018-09-30 20:28:23,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:28:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-30 20:28:23,019 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2018-09-30 20:28:23,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:23,020 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-30 20:28:23,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:28:23,020 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-30 20:28:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:28:23,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:23,020 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-09-30 20:28:23,021 INFO L423 AbstractCegarLoop]: === Iteration 32 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:23,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:23,021 INFO L82 PathProgramCache]: Analyzing trace with hash 231869447, now seen corresponding path program 29 times [2018-09-30 20:28:23,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:23,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:23,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:23,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:23,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:23,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:23,192 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:23,202 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:23,228 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:28:23,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:23,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:23,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:23,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 20:28:23,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:28:23,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:28:23,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:28:23,263 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-09-30 20:28:23,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:23,412 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-09-30 20:28:23,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:28:23,412 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 20:28:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:23,413 INFO L225 Difference]: With dead ends: 42 [2018-09-30 20:28:23,413 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:28:23,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:28:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:28:23,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:28:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:28:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-30 20:28:23,417 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2018-09-30 20:28:23,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:23,417 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-30 20:28:23,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:28:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-30 20:28:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:28:23,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:23,418 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-09-30 20:28:23,418 INFO L423 AbstractCegarLoop]: === Iteration 33 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:23,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:23,418 INFO L82 PathProgramCache]: Analyzing trace with hash -27752915, now seen corresponding path program 30 times [2018-09-30 20:28:23,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:23,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:23,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:23,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:23,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:23,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:23,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:23,648 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:23,674 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:28:23,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:23,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:23,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:23,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 20:28:23,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:28:23,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:28:23,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:28:23,716 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-09-30 20:28:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:23,812 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-09-30 20:28:23,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:28:23,812 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 20:28:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:23,813 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:28:23,813 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 20:28:23,814 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 [2018-09-30 20:28:23,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 20:28:23,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 20:28:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:28:23,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-09-30 20:28:23,817 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2018-09-30 20:28:23,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:23,817 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-09-30 20:28:23,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:28:23,818 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-09-30 20:28:23,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 20:28:23,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:23,818 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1] [2018-09-30 20:28:23,818 INFO L423 AbstractCegarLoop]: === Iteration 34 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:23,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:23,819 INFO L82 PathProgramCache]: Analyzing trace with hash -860401887, now seen corresponding path program 31 times [2018-09-30 20:28:23,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:23,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:23,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:23,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:23,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:24,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:24,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:24,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:24,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:24,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:24,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 20:28:24,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:28:24,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:28:24,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:28:24,136 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2018-09-30 20:28:24,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:24,480 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-30 20:28:24,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:28:24,480 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-09-30 20:28:24,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:24,481 INFO L225 Difference]: With dead ends: 44 [2018-09-30 20:28:24,481 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:28:24,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:28:24,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:28:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 20:28:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:28:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-09-30 20:28:24,485 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2018-09-30 20:28:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:24,486 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-09-30 20:28:24,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:28:24,486 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-09-30 20:28:24,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:28:24,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:24,486 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-09-30 20:28:24,487 INFO L423 AbstractCegarLoop]: === Iteration 35 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:24,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:24,487 INFO L82 PathProgramCache]: Analyzing trace with hash -902716243, now seen corresponding path program 32 times [2018-09-30 20:28:24,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:24,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:24,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:24,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:24,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:25,826 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:25,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:25,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:25,883 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:25,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:25,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:25,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:25,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 20:28:25,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:28:25,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:28:25,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:28:25,917 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2018-09-30 20:28:26,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:26,024 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-09-30 20:28:26,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:28:26,024 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 20:28:26,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:26,025 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:28:26,025 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:28:26,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:28:26,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:28:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 20:28:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:28:26,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-30 20:28:26,029 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2018-09-30 20:28:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:26,030 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-30 20:28:26,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:28:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-30 20:28:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:28:26,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:26,031 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-09-30 20:28:26,031 INFO L423 AbstractCegarLoop]: === Iteration 36 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:26,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:26,031 INFO L82 PathProgramCache]: Analyzing trace with hash -361074873, now seen corresponding path program 33 times [2018-09-30 20:28:26,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:26,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:26,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:26,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:26,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:26,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:26,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:26,192 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:26,234 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 20:28:26,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:26,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:26,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:26,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 20:28:26,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:28:26,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:28:26,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:28:26,264 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2018-09-30 20:28:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:26,570 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-30 20:28:26,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:28:26,571 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 20:28:26,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:26,571 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:28:26,572 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 20:28:26,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:28:26,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 20:28:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 20:28:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:28:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-09-30 20:28:26,578 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2018-09-30 20:28:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:26,579 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-09-30 20:28:26,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:28:26,579 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-09-30 20:28:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:28:26,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:26,579 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1] [2018-09-30 20:28:26,580 INFO L423 AbstractCegarLoop]: === Iteration 37 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:26,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:26,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1691519303, now seen corresponding path program 34 times [2018-09-30 20:28:26,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:26,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:26,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:26,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:26,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:27,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:27,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:27,073 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:27,090 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:27,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:27,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:27,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:27,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 20:28:27,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:28:27,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:28:27,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:28:27,120 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-09-30 20:28:27,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:27,378 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-09-30 20:28:27,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:28:27,378 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-09-30 20:28:27,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:27,379 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:28:27,379 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 20:28:27,379 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 [2018-09-30 20:28:27,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 20:28:27,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2018-09-30 20:28:27,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:28:27,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-09-30 20:28:27,382 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-09-30 20:28:27,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:27,382 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-09-30 20:28:27,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:28:27,382 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-09-30 20:28:27,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:28:27,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:27,383 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-09-30 20:28:27,383 INFO L423 AbstractCegarLoop]: === Iteration 38 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:27,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:27,383 INFO L82 PathProgramCache]: Analyzing trace with hash 897429319, now seen corresponding path program 35 times [2018-09-30 20:28:27,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:27,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:27,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:27,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:27,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:27,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:27,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:27,816 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:27,837 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:28:27,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:27,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:27,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:27,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:28:27,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:28:27,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:28:27,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:28:27,878 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2018-09-30 20:28:27,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:27,965 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-09-30 20:28:27,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:28:27,966 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 20:28:27,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:27,966 INFO L225 Difference]: With dead ends: 48 [2018-09-30 20:28:27,967 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:28:27,967 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 [2018-09-30 20:28:27,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:28:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:28:27,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:28:27,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-30 20:28:27,970 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 30 [2018-09-30 20:28:27,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:27,970 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-30 20:28:27,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:28:27,971 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-30 20:28:27,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:28:27,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:27,971 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-09-30 20:28:27,971 INFO L423 AbstractCegarLoop]: === Iteration 39 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:27,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:27,972 INFO L82 PathProgramCache]: Analyzing trace with hash 508442605, now seen corresponding path program 36 times [2018-09-30 20:28:27,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:27,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:27,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:27,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:27,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:28,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:28,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:28,616 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:28,634 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:28:28,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:28,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:28,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:28,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:28:28,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:28:28,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:28:28,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:28:28,674 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-09-30 20:28:28,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:28,729 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-09-30 20:28:28,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:28:28,729 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 20:28:28,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:28,730 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:28:28,730 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:28:28,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:28:28,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:28:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 20:28:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:28:28,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-09-30 20:28:28,733 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2018-09-30 20:28:28,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:28,733 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-09-30 20:28:28,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:28:28,733 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-09-30 20:28:28,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 20:28:28,734 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:28,734 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1] [2018-09-30 20:28:28,734 INFO L423 AbstractCegarLoop]: === Iteration 40 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:28,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:28,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1418209951, now seen corresponding path program 37 times [2018-09-30 20:28:28,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:28,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:28,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:28,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:28,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:28,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:28,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:28,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:28,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:29,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:29,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 20:28:29,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:28:29,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:28:29,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:28:29,025 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2018-09-30 20:28:29,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:29,299 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-30 20:28:29,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:28:29,299 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-09-30 20:28:29,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:29,300 INFO L225 Difference]: With dead ends: 50 [2018-09-30 20:28:29,300 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:28:29,301 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 [2018-09-30 20:28:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:28:29,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 20:28:29,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:29,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-09-30 20:28:29,305 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2018-09-30 20:28:29,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:29,305 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-09-30 20:28:29,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:28:29,305 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-09-30 20:28:29,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:28:29,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:29,305 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-09-30 20:28:29,306 INFO L423 AbstractCegarLoop]: === Iteration 41 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:29,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:29,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1014897043, now seen corresponding path program 38 times [2018-09-30 20:28:29,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:29,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:29,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:29,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:29,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:30,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:30,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:30,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:30,033 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:30,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:30,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:30,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:30,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 20:28:30,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:28:30,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:28:30,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:28:30,074 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2018-09-30 20:28:30,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:30,180 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-09-30 20:28:30,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:28:30,180 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 20:28:30,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:30,181 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:28:30,181 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:28:30,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:28:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:28:30,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 20:28:30,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 20:28:30,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-30 20:28:30,185 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2018-09-30 20:28:30,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:30,185 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-30 20:28:30,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:28:30,185 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-30 20:28:30,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:28:30,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:30,185 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-09-30 20:28:30,185 INFO L423 AbstractCegarLoop]: === Iteration 42 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:30,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:30,186 INFO L82 PathProgramCache]: Analyzing trace with hash -188583289, now seen corresponding path program 39 times [2018-09-30 20:28:30,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:30,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:30,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:30,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:30,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:30,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:30,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:30,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:30,369 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:28:30,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:30,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:30,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:30,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 20:28:30,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:28:30,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:28:30,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:28:30,400 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-09-30 20:28:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:30,508 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-30 20:28:30,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:28:30,508 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 20:28:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:30,509 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:28:30,509 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:28:30,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:28:30,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:28:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 20:28:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-09-30 20:28:30,513 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2018-09-30 20:28:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:30,513 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-09-30 20:28:30,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:28:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-09-30 20:28:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:28:30,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:30,513 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2018-09-30 20:28:30,514 INFO L423 AbstractCegarLoop]: === Iteration 43 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:30,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:30,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1551176185, now seen corresponding path program 40 times [2018-09-30 20:28:30,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:30,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:30,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:30,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:30,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:30,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:30,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:30,760 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:30,782 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:30,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:30,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:30,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:30,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:28:30,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:28:30,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:28:30,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:28:30,813 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 17 states. [2018-09-30 20:28:31,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:31,119 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-09-30 20:28:31,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:28:31,120 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2018-09-30 20:28:31,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:31,120 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:28:31,120 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 20:28:31,121 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 [2018-09-30 20:28:31,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 20:28:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2018-09-30 20:28:31,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 20:28:31,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-09-30 20:28:31,125 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2018-09-30 20:28:31,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:31,125 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-09-30 20:28:31,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:28:31,125 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-09-30 20:28:31,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:28:31,125 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:31,125 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-09-30 20:28:31,126 INFO L423 AbstractCegarLoop]: === Iteration 44 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:31,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:31,126 INFO L82 PathProgramCache]: Analyzing trace with hash -841883001, now seen corresponding path program 41 times [2018-09-30 20:28:31,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:31,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:31,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:31,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:31,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:31,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:31,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:31,301 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:31,327 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:28:31,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:31,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:31,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:31,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 20:28:31,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:28:31,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:28:31,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:28:31,359 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 18 states. [2018-09-30 20:28:31,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:31,463 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-09-30 20:28:31,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:28:31,464 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 20:28:31,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:31,464 INFO L225 Difference]: With dead ends: 54 [2018-09-30 20:28:31,465 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:28:31,465 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 [2018-09-30 20:28:31,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:28:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:28:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:28:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-30 20:28:31,469 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 34 [2018-09-30 20:28:31,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:31,469 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-30 20:28:31,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:28:31,469 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-30 20:28:31,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:28:31,470 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:31,470 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-09-30 20:28:31,470 INFO L423 AbstractCegarLoop]: === Iteration 45 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:31,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:31,470 INFO L82 PathProgramCache]: Analyzing trace with hash -995960403, now seen corresponding path program 42 times [2018-09-30 20:28:31,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:31,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:31,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:31,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:31,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:31,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:31,725 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 [2018-09-30 20:28:31,733 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:31,758 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:28:31,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:31,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:31,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:31,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 20:28:31,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:28:31,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:28:31,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:28:31,790 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-09-30 20:28:31,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:31,872 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-09-30 20:28:31,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:28:31,873 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 20:28:31,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:31,874 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:28:31,874 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 20:28:31,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:28:31,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 20:28:31,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 20:28:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 20:28:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-09-30 20:28:31,878 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2018-09-30 20:28:31,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:31,878 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-09-30 20:28:31,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:28:31,888 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-09-30 20:28:31,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 20:28:31,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:31,889 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1] [2018-09-30 20:28:31,889 INFO L423 AbstractCegarLoop]: === Iteration 46 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:31,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:31,890 INFO L82 PathProgramCache]: Analyzing trace with hash -810062943, now seen corresponding path program 43 times [2018-09-30 20:28:31,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:31,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:31,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:31,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:31,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:32,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:32,278 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 [2018-09-30 20:28:32,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:32,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:32,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:32,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 20:28:32,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:28:32,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:28:32,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:28:32,349 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 18 states. [2018-09-30 20:28:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:32,829 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-30 20:28:32,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:28:32,829 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2018-09-30 20:28:32,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:32,830 INFO L225 Difference]: With dead ends: 56 [2018-09-30 20:28:32,830 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:28:32,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:28:32,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:28:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-09-30 20:28:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 20:28:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-09-30 20:28:32,835 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2018-09-30 20:28:32,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:32,835 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-09-30 20:28:32,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:28:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-09-30 20:28:32,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 20:28:32,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:32,836 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-09-30 20:28:32,836 INFO L423 AbstractCegarLoop]: === Iteration 47 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:32,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:32,836 INFO L82 PathProgramCache]: Analyzing trace with hash 657791021, now seen corresponding path program 44 times [2018-09-30 20:28:32,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:32,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:32,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:32,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:32,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:33,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:33,067 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 [2018-09-30 20:28:33,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:33,095 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:33,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:33,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:33,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:33,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 20:28:33,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:28:33,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:28:33,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:28:33,125 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 19 states. [2018-09-30 20:28:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:33,215 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-09-30 20:28:33,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:28:33,215 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 20:28:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:33,216 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:28:33,216 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:28:33,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:28:33,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:28:33,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 20:28:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 20:28:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-30 20:28:33,219 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2018-09-30 20:28:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:33,219 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-30 20:28:33,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:28:33,220 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-30 20:28:33,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 20:28:33,220 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:33,220 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-09-30 20:28:33,220 INFO L423 AbstractCegarLoop]: === Iteration 48 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:33,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:33,221 INFO L82 PathProgramCache]: Analyzing trace with hash 176358855, now seen corresponding path program 45 times [2018-09-30 20:28:33,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:33,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:33,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:33,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:33,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:33,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:33,679 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 [2018-09-30 20:28:33,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:33,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:28:33,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:33,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:33,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:33,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 20:28:33,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:28:33,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:28:33,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:28:33,742 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2018-09-30 20:28:33,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:33,833 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-30 20:28:33,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:28:33,834 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 20:28:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:33,835 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:28:33,835 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 20:28:33,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:28:33,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 20:28:33,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 20:28:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 20:28:33,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-09-30 20:28:33,839 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2018-09-30 20:28:33,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:33,839 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-09-30 20:28:33,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:28:33,839 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-09-30 20:28:33,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 20:28:33,840 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:33,840 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1] [2018-09-30 20:28:33,840 INFO L423 AbstractCegarLoop]: === Iteration 49 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:33,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:33,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1172095687, now seen corresponding path program 46 times [2018-09-30 20:28:33,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:33,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:33,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:33,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:33,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:34,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:34,097 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 [2018-09-30 20:28:34,104 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:34,123 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:34,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:34,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:34,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:34,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 20:28:34,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:28:34,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:28:34,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:28:34,166 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 19 states. [2018-09-30 20:28:34,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:34,883 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-09-30 20:28:34,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:28:34,883 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2018-09-30 20:28:34,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:34,884 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:28:34,884 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 20:28:34,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:28:34,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 20:28:34,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-09-30 20:28:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 20:28:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-30 20:28:34,888 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2018-09-30 20:28:34,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:34,889 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-30 20:28:34,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:28:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-30 20:28:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:28:34,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:34,890 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-09-30 20:28:34,890 INFO L423 AbstractCegarLoop]: === Iteration 50 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:34,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:34,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1975166407, now seen corresponding path program 47 times [2018-09-30 20:28:34,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:34,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:34,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:34,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:34,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:35,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:35,068 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 [2018-09-30 20:28:35,075 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:35,103 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 20:28:35,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:35,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:35,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:35,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 20:28:35,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:28:35,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:28:35,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:28:35,147 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2018-09-30 20:28:35,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:35,897 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-09-30 20:28:35,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:28:35,898 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 20:28:35,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:35,898 INFO L225 Difference]: With dead ends: 60 [2018-09-30 20:28:35,898 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:28:35,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:28:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:28:35,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 20:28:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 20:28:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-30 20:28:35,901 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2018-09-30 20:28:35,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:35,901 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-30 20:28:35,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:28:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-30 20:28:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:28:35,901 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:35,901 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-09-30 20:28:35,902 INFO L423 AbstractCegarLoop]: === Iteration 51 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:35,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:35,902 INFO L82 PathProgramCache]: Analyzing trace with hash -64328851, now seen corresponding path program 48 times [2018-09-30 20:28:35,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:35,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:35,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:35,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:35,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:36,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:36,189 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 [2018-09-30 20:28:36,196 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:36,222 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 20:28:36,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:36,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:36,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:36,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 20:28:36,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:28:36,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:28:36,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:28:36,253 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-09-30 20:28:36,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:36,314 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-09-30 20:28:36,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:28:36,315 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 20:28:36,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:36,316 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:28:36,316 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 20:28:36,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:28:36,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 20:28:36,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 20:28:36,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 20:28:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-09-30 20:28:36,320 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2018-09-30 20:28:36,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:36,321 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-09-30 20:28:36,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:28:36,321 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-09-30 20:28:36,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 20:28:36,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:36,322 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1] [2018-09-30 20:28:36,322 INFO L423 AbstractCegarLoop]: === Iteration 52 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:36,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:36,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1994255903, now seen corresponding path program 49 times [2018-09-30 20:28:36,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:36,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:36,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:36,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:36,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:36,731 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:36,731 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 [2018-09-30 20:28:36,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:36,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:36,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:36,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 20:28:36,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:28:36,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:28:36,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:28:36,826 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 20 states. [2018-09-30 20:28:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:37,243 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-30 20:28:37,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:28:37,244 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2018-09-30 20:28:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:37,245 INFO L225 Difference]: With dead ends: 62 [2018-09-30 20:28:37,245 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:28:37,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:28:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:28:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-09-30 20:28:37,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 20:28:37,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-09-30 20:28:37,249 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2018-09-30 20:28:37,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:37,250 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-09-30 20:28:37,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:28:37,250 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-09-30 20:28:37,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:28:37,250 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:37,250 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-09-30 20:28:37,251 INFO L423 AbstractCegarLoop]: === Iteration 53 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:37,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:37,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1692452371, now seen corresponding path program 50 times [2018-09-30 20:28:37,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:37,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:37,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:37,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:37,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:37,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:37,509 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 [2018-09-30 20:28:37,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:37,542 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:37,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:37,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:37,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:37,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 20:28:37,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:28:37,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:28:37,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:28:37,575 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2018-09-30 20:28:37,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:37,682 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-09-30 20:28:37,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:28:37,683 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 20:28:37,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:37,683 INFO L225 Difference]: With dead ends: 63 [2018-09-30 20:28:37,683 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:28:37,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:28:37,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:28:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 20:28:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:28:37,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-30 20:28:37,688 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 40 [2018-09-30 20:28:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:37,688 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-30 20:28:37,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:28:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-30 20:28:37,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:28:37,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:37,689 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-09-30 20:28:37,689 INFO L423 AbstractCegarLoop]: === Iteration 54 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:37,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:37,689 INFO L82 PathProgramCache]: Analyzing trace with hash -492295929, now seen corresponding path program 51 times [2018-09-30 20:28:37,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:37,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:37,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:37,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:37,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:37,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:37,993 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 [2018-09-30 20:28:38,007 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:38,062 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 20:28:38,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:38,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:38,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:38,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 20:28:38,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:28:38,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:28:38,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:28:38,102 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2018-09-30 20:28:38,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:38,184 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-30 20:28:38,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:28:38,185 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 20:28:38,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:38,186 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:28:38,186 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 20:28:38,186 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 [2018-09-30 20:28:38,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 20:28:38,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 20:28:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 20:28:38,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-09-30 20:28:38,191 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-09-30 20:28:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:38,192 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-09-30 20:28:38,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:28:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-09-30 20:28:38,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 20:28:38,192 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:38,193 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1] [2018-09-30 20:28:38,193 INFO L423 AbstractCegarLoop]: === Iteration 55 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:38,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:38,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1918633863, now seen corresponding path program 52 times [2018-09-30 20:28:38,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:38,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:38,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:38,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:38,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:38,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:38,712 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 [2018-09-30 20:28:38,719 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:38,742 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:38,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:38,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:38,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:38,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 20:28:38,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:28:38,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:28:38,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:28:38,796 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-09-30 20:28:39,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:39,321 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-09-30 20:28:39,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:28:39,321 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-09-30 20:28:39,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:39,322 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:28:39,322 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 20:28:39,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:28:39,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 20:28:39,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2018-09-30 20:28:39,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 20:28:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-09-30 20:28:39,326 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2018-09-30 20:28:39,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:39,327 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-09-30 20:28:39,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:28:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-09-30 20:28:39,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:28:39,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:39,327 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-09-30 20:28:39,327 INFO L423 AbstractCegarLoop]: === Iteration 56 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:39,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:39,328 INFO L82 PathProgramCache]: Analyzing trace with hash -651953913, now seen corresponding path program 53 times [2018-09-30 20:28:39,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:39,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:39,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:39,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:39,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:39,984 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:39,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:39,984 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 [2018-09-30 20:28:39,992 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:40,022 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-09-30 20:28:40,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:40,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:40,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:40,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 20:28:40,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:28:40,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:28:40,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:28:40,059 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 22 states. [2018-09-30 20:28:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:40,180 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-09-30 20:28:40,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:28:40,180 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 20:28:40,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:40,181 INFO L225 Difference]: With dead ends: 66 [2018-09-30 20:28:40,181 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:28:40,181 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 [2018-09-30 20:28:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:28:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:28:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:28:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-30 20:28:40,185 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 42 [2018-09-30 20:28:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:40,185 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-30 20:28:40,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:28:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-30 20:28:40,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:28:40,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:40,186 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-09-30 20:28:40,186 INFO L423 AbstractCegarLoop]: === Iteration 57 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:40,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:40,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2101809875, now seen corresponding path program 54 times [2018-09-30 20:28:40,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:40,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:40,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:40,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:40,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:41,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:41,179 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 [2018-09-30 20:28:41,186 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:41,215 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-30 20:28:41,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:41,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:41,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:41,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 20:28:41,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:28:41,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:28:41,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:28:41,249 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-09-30 20:28:41,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:41,310 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-09-30 20:28:41,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:28:41,311 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 20:28:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:41,312 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:28:41,312 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 20:28:41,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:28:41,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 20:28:41,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 20:28:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 20:28:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-09-30 20:28:41,316 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-09-30 20:28:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:41,316 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-09-30 20:28:41,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:28:41,317 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-09-30 20:28:41,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 20:28:41,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:41,317 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1] [2018-09-30 20:28:41,317 INFO L423 AbstractCegarLoop]: === Iteration 58 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:41,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:41,318 INFO L82 PathProgramCache]: Analyzing trace with hash -731658207, now seen corresponding path program 55 times [2018-09-30 20:28:41,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:41,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:41,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:41,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:41,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:41,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:41,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:28:41,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:41,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:41,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:41,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 20:28:41,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:28:41,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:28:41,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:28:41,798 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 22 states. [2018-09-30 20:28:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:42,316 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-30 20:28:42,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:28:42,316 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2018-09-30 20:28:42,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:42,317 INFO L225 Difference]: With dead ends: 68 [2018-09-30 20:28:42,317 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 20:28:42,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:28:42,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 20:28:42,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2018-09-30 20:28:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 20:28:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-30 20:28:42,321 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2018-09-30 20:28:42,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:42,322 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-30 20:28:42,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:28:42,322 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-30 20:28:42,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:28:42,322 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:42,322 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-09-30 20:28:42,323 INFO L423 AbstractCegarLoop]: === Iteration 59 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:42,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:42,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1206629459, now seen corresponding path program 56 times [2018-09-30 20:28:42,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:42,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:42,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:42,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:42,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:42,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:42,811 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 [2018-09-30 20:28:42,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:42,845 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:42,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:42,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:42,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:42,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 20:28:42,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:28:42,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:28:42,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:28:42,877 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 23 states. [2018-09-30 20:28:43,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:43,013 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-09-30 20:28:43,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:28:43,014 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 20:28:43,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:43,014 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:28:43,015 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:28:43,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:28:43,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:28:43,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 20:28:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:28:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-30 20:28:43,019 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2018-09-30 20:28:43,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:43,019 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-30 20:28:43,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:28:43,019 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-30 20:28:43,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:28:43,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:43,019 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-09-30 20:28:43,020 INFO L423 AbstractCegarLoop]: === Iteration 60 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:43,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:43,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1092475975, now seen corresponding path program 57 times [2018-09-30 20:28:43,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:43,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:43,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:43,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:43,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:43,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:43,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:28:43,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:43,290 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-30 20:28:43,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:43,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:43,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:43,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 20:28:43,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:28:43,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:28:43,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:28:43,320 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 23 states. [2018-09-30 20:28:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:43,381 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-30 20:28:43,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:28:43,382 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 20:28:43,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:43,382 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:28:43,382 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 20:28:43,383 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 [2018-09-30 20:28:43,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 20:28:43,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 20:28:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 20:28:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-09-30 20:28:43,387 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-09-30 20:28:43,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:43,387 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-09-30 20:28:43,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:28:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-09-30 20:28:43,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 20:28:43,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:43,388 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1] [2018-09-30 20:28:43,388 INFO L423 AbstractCegarLoop]: === Iteration 61 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:43,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:43,389 INFO L82 PathProgramCache]: Analyzing trace with hash -493044665, now seen corresponding path program 58 times [2018-09-30 20:28:43,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:43,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:43,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:43,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:43,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:43,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:43,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:43,889 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:43,914 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:43,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:43,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:43,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:43,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 20:28:43,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:28:43,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:28:43,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:28:43,946 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 23 states. [2018-09-30 20:28:44,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:44,578 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-09-30 20:28:44,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:28:44,579 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2018-09-30 20:28:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:44,580 INFO L225 Difference]: With dead ends: 71 [2018-09-30 20:28:44,580 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 20:28:44,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:28:44,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 20:28:44,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2018-09-30 20:28:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 20:28:44,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-09-30 20:28:44,585 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2018-09-30 20:28:44,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:44,585 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-09-30 20:28:44,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:28:44,585 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-09-30 20:28:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 20:28:44,585 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:44,586 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-09-30 20:28:44,586 INFO L423 AbstractCegarLoop]: === Iteration 62 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:44,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:44,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1895423047, now seen corresponding path program 59 times [2018-09-30 20:28:44,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:44,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:44,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:44,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:44,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:45,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:45,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:28:45,382 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:45,432 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 20:28:45,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:45,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:45,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:45,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 20:28:45,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:28:45,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:28:45,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:28:45,477 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2018-09-30 20:28:45,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:45,677 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-09-30 20:28:45,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:28:45,677 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 20:28:45,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:45,678 INFO L225 Difference]: With dead ends: 72 [2018-09-30 20:28:45,678 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:28:45,679 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 [2018-09-30 20:28:45,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:28:45,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 20:28:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 20:28:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-30 20:28:45,682 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 46 [2018-09-30 20:28:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:45,682 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-30 20:28:45,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:28:45,683 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-30 20:28:45,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 20:28:45,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:45,683 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-09-30 20:28:45,683 INFO L423 AbstractCegarLoop]: === Iteration 63 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:45,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:45,683 INFO L82 PathProgramCache]: Analyzing trace with hash 153247469, now seen corresponding path program 60 times [2018-09-30 20:28:45,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:45,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:45,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:45,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:45,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:45,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:45,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:28:45,997 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:46,114 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-09-30 20:28:46,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:46,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:46,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:46,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 20:28:46,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:28:46,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:28:46,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:28:46,147 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-09-30 20:28:46,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:46,219 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-09-30 20:28:46,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:28:46,219 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 20:28:46,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:46,220 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:28:46,220 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 20:28:46,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:28:46,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 20:28:46,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 20:28:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 20:28:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-09-30 20:28:46,224 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2018-09-30 20:28:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:46,224 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-09-30 20:28:46,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:28:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-09-30 20:28:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 20:28:46,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:46,225 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1] [2018-09-30 20:28:46,225 INFO L423 AbstractCegarLoop]: === Iteration 64 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:46,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:46,225 INFO L82 PathProgramCache]: Analyzing trace with hash 455642721, now seen corresponding path program 61 times [2018-09-30 20:28:46,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:46,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:46,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:46,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:46,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:46,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:46,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:28:46,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:46,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:46,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:46,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 20:28:46,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:28:46,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:28:46,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:28:46,636 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 24 states. [2018-09-30 20:28:47,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:47,251 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-30 20:28:47,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:28:47,252 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2018-09-30 20:28:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:47,252 INFO L225 Difference]: With dead ends: 74 [2018-09-30 20:28:47,253 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 20:28:47,253 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 [2018-09-30 20:28:47,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 20:28:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-09-30 20:28:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 20:28:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-30 20:28:47,257 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-09-30 20:28:47,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:47,258 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-30 20:28:47,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:28:47,258 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-30 20:28:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 20:28:47,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:47,258 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-09-30 20:28:47,258 INFO L423 AbstractCegarLoop]: === Iteration 65 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:47,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:47,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1239960941, now seen corresponding path program 62 times [2018-09-30 20:28:47,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:47,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:47,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:47,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:47,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:47,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:47,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:28:47,519 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:47,548 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:47,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:47,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:47,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:47,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 20:28:47,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:28:47,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:28:47,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:28:47,579 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2018-09-30 20:28:47,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:47,697 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-09-30 20:28:47,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:28:47,698 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 20:28:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:47,699 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:28:47,699 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:28:47,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:28:47,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:28:47,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 20:28:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 20:28:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-30 20:28:47,703 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 48 [2018-09-30 20:28:47,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:47,703 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-30 20:28:47,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:28:47,704 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-30 20:28:47,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 20:28:47,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:47,704 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-09-30 20:28:47,704 INFO L423 AbstractCegarLoop]: === Iteration 66 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:47,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:47,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1227874425, now seen corresponding path program 63 times [2018-09-30 20:28:47,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:47,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:47,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:47,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:47,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:48,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:48,358 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 [2018-09-30 20:28:48,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:48,399 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 20:28:48,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:48,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:48,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:48,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 20:28:48,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:28:48,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:28:48,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:28:48,436 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 25 states. [2018-09-30 20:28:48,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:48,507 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-30 20:28:48,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:28:48,508 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 20:28:48,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:48,508 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:28:48,508 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 20:28:48,509 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 [2018-09-30 20:28:48,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 20:28:48,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 20:28:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 20:28:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-09-30 20:28:48,513 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2018-09-30 20:28:48,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:48,513 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-09-30 20:28:48,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:28:48,513 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-09-30 20:28:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 20:28:48,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:48,514 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2018-09-30 20:28:48,514 INFO L423 AbstractCegarLoop]: === Iteration 67 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:48,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:48,514 INFO L82 PathProgramCache]: Analyzing trace with hash 590536967, now seen corresponding path program 64 times [2018-09-30 20:28:48,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:48,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:48,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:48,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:48,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:49,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:49,334 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 [2018-09-30 20:28:49,343 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:49,370 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:49,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:49,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:49,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:49,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 20:28:49,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:28:49,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:28:49,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:28:49,403 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 25 states. [2018-09-30 20:28:50,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:50,072 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-09-30 20:28:50,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:28:50,072 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2018-09-30 20:28:50,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:50,073 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:28:50,074 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 20:28:50,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:28:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 20:28:50,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2018-09-30 20:28:50,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 20:28:50,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-30 20:28:50,079 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2018-09-30 20:28:50,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:50,079 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-30 20:28:50,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:28:50,079 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-30 20:28:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:28:50,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:50,080 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-09-30 20:28:50,080 INFO L423 AbstractCegarLoop]: === Iteration 68 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:50,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:50,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1126715271, now seen corresponding path program 65 times [2018-09-30 20:28:50,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:50,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:50,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:50,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:50,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:50,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:50,327 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 [2018-09-30 20:28:50,337 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:50,369 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 20:28:50,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:50,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:50,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:50,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 20:28:50,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:28:50,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:28:50,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:28:50,400 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-09-30 20:28:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:50,553 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-09-30 20:28:50,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:28:50,554 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 20:28:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:50,555 INFO L225 Difference]: With dead ends: 78 [2018-09-30 20:28:50,555 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:28:50,555 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 [2018-09-30 20:28:50,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:28:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 20:28:50,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:28:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-30 20:28:50,560 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 50 [2018-09-30 20:28:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:50,561 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-30 20:28:50,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:28:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-30 20:28:50,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:28:50,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:50,561 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-09-30 20:28:50,561 INFO L423 AbstractCegarLoop]: === Iteration 69 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:50,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:50,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1933230253, now seen corresponding path program 66 times [2018-09-30 20:28:50,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:50,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:50,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:50,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:50,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:50,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:50,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:28:51,008 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:51,040 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:28:51,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:51,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:51,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:51,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 20:28:51,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:28:51,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:28:51,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:28:51,073 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-09-30 20:28:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:51,219 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-09-30 20:28:51,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:28:51,220 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 20:28:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:51,220 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:28:51,221 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 20:28:51,221 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 [2018-09-30 20:28:51,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 20:28:51,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 20:28:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 20:28:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-09-30 20:28:51,225 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2018-09-30 20:28:51,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:51,225 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-09-30 20:28:51,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:28:51,226 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-09-30 20:28:51,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 20:28:51,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:51,226 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1] [2018-09-30 20:28:51,226 INFO L423 AbstractCegarLoop]: === Iteration 70 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:51,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:51,226 INFO L82 PathProgramCache]: Analyzing trace with hash -199465823, now seen corresponding path program 67 times [2018-09-30 20:28:51,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:51,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:51,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:51,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:51,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:51,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:51,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:28:51,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:51,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:51,934 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:51,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:51,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 20:28:51,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:28:51,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:28:51,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:28:51,955 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 26 states. [2018-09-30 20:28:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:52,692 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-30 20:28:52,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:28:52,693 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-09-30 20:28:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:52,694 INFO L225 Difference]: With dead ends: 80 [2018-09-30 20:28:52,694 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 20:28:52,694 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 [2018-09-30 20:28:52,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 20:28:52,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2018-09-30 20:28:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 20:28:52,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-09-30 20:28:52,698 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2018-09-30 20:28:52,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:52,698 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-09-30 20:28:52,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:28:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-09-30 20:28:52,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:28:52,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:52,699 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-09-30 20:28:52,699 INFO L423 AbstractCegarLoop]: === Iteration 71 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:52,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:52,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1888534739, now seen corresponding path program 68 times [2018-09-30 20:28:52,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:52,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:52,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:52,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:52,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:53,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:53,032 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 [2018-09-30 20:28:53,039 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:53,070 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:53,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:53,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:53,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:53,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 20:28:53,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:28:53,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:28:53,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:28:53,104 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 27 states. [2018-09-30 20:28:53,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:53,355 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-09-30 20:28:53,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:28:53,355 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-30 20:28:53,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:53,356 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:28:53,356 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:28:53,357 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 [2018-09-30 20:28:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:28:53,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 20:28:53,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 20:28:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-30 20:28:53,360 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2018-09-30 20:28:53,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:53,361 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-30 20:28:53,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:28:53,361 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-30 20:28:53,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:28:53,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:53,361 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-09-30 20:28:53,361 INFO L423 AbstractCegarLoop]: === Iteration 72 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:53,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:53,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1638593223, now seen corresponding path program 69 times [2018-09-30 20:28:53,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:53,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:53,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:53,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:53,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:53,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:53,832 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 [2018-09-30 20:28:53,839 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:53,876 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-09-30 20:28:53,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:53,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:53,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:53,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 20:28:53,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:28:53,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:28:53,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:28:53,917 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 27 states. [2018-09-30 20:28:54,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:54,098 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-30 20:28:54,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:28:54,099 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-30 20:28:54,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:54,100 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:28:54,100 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 20:28:54,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:28:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 20:28:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 20:28:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 20:28:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-09-30 20:28:54,103 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2018-09-30 20:28:54,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:54,103 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-09-30 20:28:54,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:28:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-09-30 20:28:54,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 20:28:54,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:54,103 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1] [2018-09-30 20:28:54,104 INFO L423 AbstractCegarLoop]: === Iteration 73 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:54,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:54,104 INFO L82 PathProgramCache]: Analyzing trace with hash -743279161, now seen corresponding path program 70 times [2018-09-30 20:28:54,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:54,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:54,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:54,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:54,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:54,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:54,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:28:54,546 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:54,577 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:54,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:54,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:54,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:54,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 20:28:54,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:28:54,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:28:54,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:28:54,662 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 27 states. [2018-09-30 20:28:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:55,628 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-09-30 20:28:55,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:28:55,629 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2018-09-30 20:28:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:55,629 INFO L225 Difference]: With dead ends: 83 [2018-09-30 20:28:55,630 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 20:28:55,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:28:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 20:28:55,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-09-30 20:28:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 20:28:55,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-30 20:28:55,635 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-09-30 20:28:55,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:55,635 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-30 20:28:55,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:28:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-30 20:28:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 20:28:55,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:55,636 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-09-30 20:28:55,636 INFO L423 AbstractCegarLoop]: === Iteration 74 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:55,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:55,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1566879033, now seen corresponding path program 71 times [2018-09-30 20:28:55,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:55,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:55,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:55,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:55,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:56,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:56,153 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 [2018-09-30 20:28:56,160 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:56,197 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-30 20:28:56,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:56,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:56,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:56,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 20:28:56,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:28:56,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:28:56,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:28:56,232 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 28 states. [2018-09-30 20:28:56,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:56,435 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-09-30 20:28:56,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:28:56,436 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 20:28:56,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:56,436 INFO L225 Difference]: With dead ends: 84 [2018-09-30 20:28:56,437 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:28:56,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:28:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:28:56,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 20:28:56,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 20:28:56,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-30 20:28:56,440 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 54 [2018-09-30 20:28:56,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:56,441 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-30 20:28:56,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:28:56,441 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-30 20:28:56,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 20:28:56,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:56,441 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-09-30 20:28:56,442 INFO L423 AbstractCegarLoop]: === Iteration 75 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:56,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:56,442 INFO L82 PathProgramCache]: Analyzing trace with hash 399905389, now seen corresponding path program 72 times [2018-09-30 20:28:56,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:56,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:56,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:56,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:56,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:57,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:57,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:28:57,804 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:57,845 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-30 20:28:57,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:57,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:57,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:57,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 20:28:57,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:28:57,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:28:57,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:28:57,914 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-09-30 20:28:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:58,129 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-09-30 20:28:58,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:28:58,129 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 20:28:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:58,130 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:28:58,130 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 20:28:58,131 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 [2018-09-30 20:28:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 20:28:58,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 20:28:58,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 20:28:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-09-30 20:28:58,134 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2018-09-30 20:28:58,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:58,135 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-09-30 20:28:58,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:28:58,135 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-09-30 20:28:58,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 20:28:58,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:58,135 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1] [2018-09-30 20:28:58,135 INFO L423 AbstractCegarLoop]: === Iteration 76 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:58,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:58,136 INFO L82 PathProgramCache]: Analyzing trace with hash -487896351, now seen corresponding path program 73 times [2018-09-30 20:28:58,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:58,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:58,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:58,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:58,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:58,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:58,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:28:58,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:58,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:58,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:58,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 20:28:58,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:28:58,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:28:58,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:28:58,692 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 28 states. [2018-09-30 20:28:59,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:59,762 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-30 20:28:59,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:28:59,762 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2018-09-30 20:28:59,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:59,763 INFO L225 Difference]: With dead ends: 86 [2018-09-30 20:28:59,763 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 20:28:59,764 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 [2018-09-30 20:28:59,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 20:28:59,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2018-09-30 20:28:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 20:28:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-09-30 20:28:59,769 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2018-09-30 20:28:59,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:59,769 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-09-30 20:28:59,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:28:59,770 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-09-30 20:28:59,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 20:28:59,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:59,770 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-09-30 20:28:59,770 INFO L423 AbstractCegarLoop]: === Iteration 77 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:59,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:59,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2055020781, now seen corresponding path program 74 times [2018-09-30 20:28:59,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:59,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:59,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:59,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:59,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:00,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:00,049 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 [2018-09-30 20:29:00,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:29:00,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:29:00,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:00,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:00,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:00,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 20:29:00,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:29:00,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:29:00,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:29:00,121 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2018-09-30 20:29:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:00,379 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-09-30 20:29:00,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:29:00,380 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 20:29:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:00,380 INFO L225 Difference]: With dead ends: 87 [2018-09-30 20:29:00,380 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:29:00,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:29:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:29:00,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 20:29:00,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 20:29:00,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-30 20:29:00,385 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 56 [2018-09-30 20:29:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:00,386 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-30 20:29:00,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:29:00,386 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-30 20:29:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 20:29:00,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:00,386 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-09-30 20:29:00,386 INFO L423 AbstractCegarLoop]: === Iteration 78 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:00,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:00,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1399171577, now seen corresponding path program 75 times [2018-09-30 20:29:00,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:00,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:00,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:00,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:00,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:00,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:00,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:00,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:29:00,965 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-09-30 20:29:00,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:00,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:01,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:01,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 20:29:01,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:29:01,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:29:01,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:29:01,005 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 29 states. [2018-09-30 20:29:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:01,108 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-30 20:29:01,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:29:01,109 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 20:29:01,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:01,109 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:29:01,110 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 20:29:01,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:29:01,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 20:29:01,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 20:29:01,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 20:29:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-09-30 20:29:01,113 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2018-09-30 20:29:01,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:01,113 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-09-30 20:29:01,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:29:01,113 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-09-30 20:29:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 20:29:01,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:01,114 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1] [2018-09-30 20:29:01,114 INFO L423 AbstractCegarLoop]: === Iteration 79 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:01,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:01,114 INFO L82 PathProgramCache]: Analyzing trace with hash -424707449, now seen corresponding path program 76 times [2018-09-30 20:29:01,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:01,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:01,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:01,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:01,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:01,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:01,588 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 [2018-09-30 20:29:01,597 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:29:01,635 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:29:01,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:01,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:01,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:01,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 20:29:01,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:29:01,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:29:01,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:29:01,740 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 29 states. [2018-09-30 20:29:03,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:03,830 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-09-30 20:29:03,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:29:03,831 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-09-30 20:29:03,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:03,831 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:29:03,832 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 20:29:03,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:29:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 20:29:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2018-09-30 20:29:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 20:29:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-09-30 20:29:03,837 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2018-09-30 20:29:03,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:03,837 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-09-30 20:29:03,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:29:03,837 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-09-30 20:29:03,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:29:03,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:03,838 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-09-30 20:29:03,838 INFO L423 AbstractCegarLoop]: === Iteration 80 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:03,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:03,838 INFO L82 PathProgramCache]: Analyzing trace with hash -281090553, now seen corresponding path program 77 times [2018-09-30 20:29:03,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:03,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:03,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:03,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:03,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:04,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:04,710 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 [2018-09-30 20:29:04,717 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:29:04,753 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-09-30 20:29:04,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:04,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:04,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:04,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 20:29:04,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:29:04,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:29:04,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:29:04,788 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 30 states. [2018-09-30 20:29:04,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:04,996 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-09-30 20:29:04,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:29:04,997 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 20:29:04,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:04,997 INFO L225 Difference]: With dead ends: 90 [2018-09-30 20:29:04,998 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:29:04,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:29:04,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:29:05,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 20:29:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:29:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-30 20:29:05,004 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 58 [2018-09-30 20:29:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:05,004 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-30 20:29:05,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:29:05,004 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-30 20:29:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:29:05,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:05,005 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-09-30 20:29:05,005 INFO L423 AbstractCegarLoop]: === Iteration 81 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:05,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:05,006 INFO L82 PathProgramCache]: Analyzing trace with hash 13128749, now seen corresponding path program 78 times [2018-09-30 20:29:05,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:05,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:05,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:05,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:05,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:05,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:05,497 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 [2018-09-30 20:29:05,507 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:29:05,542 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-09-30 20:29:05,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:05,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:05,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:05,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 20:29:05,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:29:05,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:29:05,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:29:05,578 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-09-30 20:29:05,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:05,657 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-09-30 20:29:05,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:29:05,658 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 20:29:05,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:05,658 INFO L225 Difference]: With dead ends: 63 [2018-09-30 20:29:05,659 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 20:29:05,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:29:05,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 20:29:05,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 20:29:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 20:29:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-09-30 20:29:05,664 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2018-09-30 20:29:05,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:05,664 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-09-30 20:29:05,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:29:05,665 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-09-30 20:29:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 20:29:05,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:05,665 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1] [2018-09-30 20:29:05,665 INFO L423 AbstractCegarLoop]: === Iteration 82 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:05,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:05,666 INFO L82 PathProgramCache]: Analyzing trace with hash 406929697, now seen corresponding path program 79 times [2018-09-30 20:29:05,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:05,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:05,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:05,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:05,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:06,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:06,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:06,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:06,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:06,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:06,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 20:29:06,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:29:06,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:29:06,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:29:06,400 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 30 states. [2018-09-30 20:29:07,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:07,422 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-30 20:29:07,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:29:07,423 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2018-09-30 20:29:07,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:07,423 INFO L225 Difference]: With dead ends: 92 [2018-09-30 20:29:07,424 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 20:29:07,424 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 [2018-09-30 20:29:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 20:29:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-09-30 20:29:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 20:29:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-09-30 20:29:07,430 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2018-09-30 20:29:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:07,430 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-09-30 20:29:07,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:29:07,430 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-09-30 20:29:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 20:29:07,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:07,430 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-09-30 20:29:07,431 INFO L423 AbstractCegarLoop]: === Iteration 83 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:07,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:07,431 INFO L82 PathProgramCache]: Analyzing trace with hash -270142803, now seen corresponding path program 80 times [2018-09-30 20:29:07,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:07,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:07,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:07,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:07,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:07,747 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:07,747 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 [2018-09-30 20:29:07,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:29:07,789 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:29:07,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:07,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:07,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:07,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 20:29:07,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:29:07,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:29:07,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:29:07,823 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 31 states. [2018-09-30 20:29:08,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:08,084 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-09-30 20:29:08,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:29:08,085 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-30 20:29:08,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:08,085 INFO L225 Difference]: With dead ends: 93 [2018-09-30 20:29:08,086 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:29:08,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:29:08,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:29:08,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 20:29:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 20:29:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-30 20:29:08,091 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2018-09-30 20:29:08,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:08,091 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-30 20:29:08,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:29:08,092 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-30 20:29:08,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 20:29:08,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:08,092 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-09-30 20:29:08,092 INFO L423 AbstractCegarLoop]: === Iteration 84 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:08,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:08,093 INFO L82 PathProgramCache]: Analyzing trace with hash 260720967, now seen corresponding path program 81 times [2018-09-30 20:29:08,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:08,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:08,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:08,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:08,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:08,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:08,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:08,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:29:08,824 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 20:29:08,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:08,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:08,872 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:08,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 20:29:08,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:29:08,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:29:08,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:29:08,873 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 31 states. [2018-09-30 20:29:09,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:09,005 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-30 20:29:09,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:29:09,006 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-30 20:29:09,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:09,006 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:29:09,006 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 20:29:09,007 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 [2018-09-30 20:29:09,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 20:29:09,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 20:29:09,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 20:29:09,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-09-30 20:29:09,012 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2018-09-30 20:29:09,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:09,012 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-09-30 20:29:09,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:29:09,013 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-09-30 20:29:09,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 20:29:09,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:09,013 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1] [2018-09-30 20:29:09,013 INFO L423 AbstractCegarLoop]: === Iteration 85 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:09,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:09,014 INFO L82 PathProgramCache]: Analyzing trace with hash -507646137, now seen corresponding path program 82 times [2018-09-30 20:29:09,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:09,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:09,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:09,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:09,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:09,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:09,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:09,851 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:29:09,892 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:29:09,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:09,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:09,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:09,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 20:29:09,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:29:09,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:29:09,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:29:09,964 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 31 states. [2018-09-30 20:29:11,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:11,023 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2018-09-30 20:29:11,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:29:11,024 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2018-09-30 20:29:11,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:11,024 INFO L225 Difference]: With dead ends: 95 [2018-09-30 20:29:11,025 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 20:29:11,025 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 [2018-09-30 20:29:11,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 20:29:11,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2018-09-30 20:29:11,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 20:29:11,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-09-30 20:29:11,030 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2018-09-30 20:29:11,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:11,031 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-09-30 20:29:11,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:29:11,031 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-09-30 20:29:11,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:29:11,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:11,032 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-09-30 20:29:11,032 INFO L423 AbstractCegarLoop]: === Iteration 86 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:11,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:11,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1442777415, now seen corresponding path program 83 times [2018-09-30 20:29:11,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:11,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:11,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:11,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:11,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:11,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:11,400 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 [2018-09-30 20:29:11,407 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:29:11,450 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 20:29:11,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:11,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:11,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:11,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 20:29:11,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:29:11,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:29:11,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:29:11,499 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2018-09-30 20:29:11,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:11,720 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-09-30 20:29:11,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:29:11,720 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-30 20:29:11,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:11,721 INFO L225 Difference]: With dead ends: 96 [2018-09-30 20:29:11,721 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 20:29:11,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:29:11,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 20:29:11,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 20:29:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 20:29:11,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-30 20:29:11,727 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 62 [2018-09-30 20:29:11,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:11,727 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-30 20:29:11,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:29:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-30 20:29:11,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:29:11,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:11,728 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-09-30 20:29:11,728 INFO L423 AbstractCegarLoop]: === Iteration 87 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:11,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash 719685101, now seen corresponding path program 84 times [2018-09-30 20:29:11,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:11,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:11,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:11,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:11,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:12,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:12,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:12,771 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:29:12,812 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 20:29:12,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:12,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:12,846 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:12,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 20:29:12,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:29:12,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:29:12,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:29:12,847 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-09-30 20:29:12,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:12,945 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-09-30 20:29:12,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:29:12,945 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-30 20:29:12,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:12,946 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:29:12,947 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 20:29:12,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:29:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 20:29:12,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 20:29:12,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 20:29:12,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-09-30 20:29:12,951 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2018-09-30 20:29:12,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:12,951 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-09-30 20:29:12,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:29:12,952 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-09-30 20:29:12,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 20:29:12,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:12,952 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1] [2018-09-30 20:29:12,952 INFO L423 AbstractCegarLoop]: === Iteration 88 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:12,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:12,953 INFO L82 PathProgramCache]: Analyzing trace with hash 835340129, now seen corresponding path program 85 times [2018-09-30 20:29:12,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:12,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:12,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:12,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:12,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:13,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:13,643 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 [2018-09-30 20:29:13,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:13,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:13,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:13,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 20:29:13,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:29:13,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:29:13,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:29:13,744 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 32 states. [2018-09-30 20:29:15,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:15,081 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-30 20:29:15,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:29:15,082 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2018-09-30 20:29:15,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:15,083 INFO L225 Difference]: With dead ends: 98 [2018-09-30 20:29:15,083 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 20:29:15,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:29:15,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 20:29:15,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2018-09-30 20:29:15,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 20:29:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-09-30 20:29:15,089 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2018-09-30 20:29:15,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:15,089 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-09-30 20:29:15,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:29:15,089 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-09-30 20:29:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 20:29:15,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:15,090 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-09-30 20:29:15,090 INFO L423 AbstractCegarLoop]: === Iteration 89 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:15,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:15,090 INFO L82 PathProgramCache]: Analyzing trace with hash 125678701, now seen corresponding path program 86 times [2018-09-30 20:29:15,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:15,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:15,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:15,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:15,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:15,550 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:15,550 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 [2018-09-30 20:29:15,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:29:15,612 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:29:15,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:15,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:15,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:15,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 20:29:15,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:29:15,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:29:15,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:29:15,661 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2018-09-30 20:29:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:15,957 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-09-30 20:29:15,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:29:15,957 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-30 20:29:15,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:15,958 INFO L225 Difference]: With dead ends: 99 [2018-09-30 20:29:15,958 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 20:29:15,959 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 [2018-09-30 20:29:15,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 20:29:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 20:29:15,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 20:29:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-30 20:29:15,963 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 64 [2018-09-30 20:29:15,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:15,963 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-30 20:29:15,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:29:15,963 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-30 20:29:15,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 20:29:15,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:15,963 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-09-30 20:29:15,964 INFO L423 AbstractCegarLoop]: === Iteration 90 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:15,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:15,964 INFO L82 PathProgramCache]: Analyzing trace with hash -815346553, now seen corresponding path program 87 times [2018-09-30 20:29:15,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:15,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:15,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:15,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:15,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:16,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:16,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:16,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:29:16,421 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 20:29:16,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:16,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:16,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:16,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 20:29:16,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:29:16,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:29:16,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:29:16,456 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 33 states. [2018-09-30 20:29:16,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:16,556 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-30 20:29:16,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:29:16,556 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-30 20:29:16,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:16,557 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:29:16,557 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 20:29:16,558 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 [2018-09-30 20:29:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 20:29:16,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 20:29:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 20:29:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-09-30 20:29:16,563 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2018-09-30 20:29:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:16,563 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-09-30 20:29:16,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:29:16,564 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-09-30 20:29:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 20:29:16,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:16,564 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1] [2018-09-30 20:29:16,564 INFO L423 AbstractCegarLoop]: === Iteration 91 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:16,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:16,564 INFO L82 PathProgramCache]: Analyzing trace with hash 493999111, now seen corresponding path program 88 times [2018-09-30 20:29:16,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:16,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:16,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:16,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:16,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:17,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:17,144 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 [2018-09-30 20:29:17,151 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:29:17,193 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:29:17,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:17,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:17,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:17,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 20:29:17,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:29:17,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:29:17,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:29:17,249 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 33 states. [2018-09-30 20:29:18,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:18,483 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-09-30 20:29:18,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:29:18,483 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2018-09-30 20:29:18,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:18,484 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:29:18,484 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 20:29:18,485 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 [2018-09-30 20:29:18,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 20:29:18,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2018-09-30 20:29:18,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 20:29:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-09-30 20:29:18,489 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-09-30 20:29:18,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:18,489 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-09-30 20:29:18,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:29:18,489 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-09-30 20:29:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 20:29:18,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:18,490 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-09-30 20:29:18,490 INFO L423 AbstractCegarLoop]: === Iteration 92 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:18,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:18,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1865958265, now seen corresponding path program 89 times [2018-09-30 20:29:18,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:18,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:18,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:18,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:18,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:18,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:18,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:18,889 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:29:18,940 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-09-30 20:29:18,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:18,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:18,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:18,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 20:29:18,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:29:18,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:29:18,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:29:18,994 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 34 states. [2018-09-30 20:29:19,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:19,401 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-09-30 20:29:19,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:29:19,402 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-30 20:29:19,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:19,403 INFO L225 Difference]: With dead ends: 102 [2018-09-30 20:29:19,403 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 20:29:19,403 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 [2018-09-30 20:29:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 20:29:19,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 20:29:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 20:29:19,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-30 20:29:19,408 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 66 [2018-09-30 20:29:19,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:19,408 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-30 20:29:19,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:29:19,408 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-30 20:29:19,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 20:29:19,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:19,408 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-09-30 20:29:19,409 INFO L423 AbstractCegarLoop]: === Iteration 93 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:19,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:19,409 INFO L82 PathProgramCache]: Analyzing trace with hash -972970067, now seen corresponding path program 90 times [2018-09-30 20:29:19,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:19,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:19,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:19,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:19,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:20,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:20,092 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 [2018-09-30 20:29:20,100 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:29:20,144 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-30 20:29:20,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:20,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:20,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:20,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 20:29:20,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:29:20,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:29:20,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:29:20,178 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-09-30 20:29:20,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:20,273 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-09-30 20:29:20,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:29:20,274 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-30 20:29:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:20,274 INFO L225 Difference]: With dead ends: 71 [2018-09-30 20:29:20,274 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 20:29:20,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:29:20,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 20:29:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 20:29:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 20:29:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-09-30 20:29:20,280 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 66 [2018-09-30 20:29:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:20,280 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-09-30 20:29:20,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:29:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-09-30 20:29:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 20:29:20,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:20,281 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1] [2018-09-30 20:29:20,281 INFO L423 AbstractCegarLoop]: === Iteration 94 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:20,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:20,281 INFO L82 PathProgramCache]: Analyzing trace with hash -97362527, now seen corresponding path program 91 times [2018-09-30 20:29:20,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:20,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:20,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:20,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:20,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:20,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:20,894 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 [2018-09-30 20:29:20,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:20,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:21,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:21,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 20:29:21,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:29:21,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:29:21,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:29:21,028 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 34 states. [2018-09-30 20:29:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:22,315 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-30 20:29:22,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:29:22,315 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2018-09-30 20:29:22,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:22,316 INFO L225 Difference]: With dead ends: 104 [2018-09-30 20:29:22,316 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 20:29:22,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:29:22,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 20:29:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2018-09-30 20:29:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 20:29:22,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-30 20:29:22,321 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2018-09-30 20:29:22,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:22,321 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-30 20:29:22,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:29:22,322 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-30 20:29:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 20:29:22,322 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:22,322 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-09-30 20:29:22,322 INFO L423 AbstractCegarLoop]: === Iteration 95 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:22,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:22,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1276667437, now seen corresponding path program 92 times [2018-09-30 20:29:22,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:22,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:22,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:22,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:22,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:22,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:22,719 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 [2018-09-30 20:29:22,727 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:29:22,763 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:29:22,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:22,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:22,809 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:22,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 20:29:22,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:29:22,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:29:22,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:29:22,811 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 35 states. [2018-09-30 20:29:23,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:23,935 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-09-30 20:29:23,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:29:23,935 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-30 20:29:23,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:23,936 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:29:23,936 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 20:29:23,937 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 [2018-09-30 20:29:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 20:29:23,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 20:29:23,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 20:29:23,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-30 20:29:23,955 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2018-09-30 20:29:23,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:23,955 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-30 20:29:23,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:29:23,955 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-30 20:29:23,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 20:29:23,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:23,956 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-09-30 20:29:23,956 INFO L423 AbstractCegarLoop]: === Iteration 96 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:23,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:23,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1105469497, now seen corresponding path program 93 times [2018-09-30 20:29:23,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:23,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:23,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:23,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:23,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:24,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:24,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:24,624 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:29:24,669 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-30 20:29:24,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:24,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:24,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:24,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 20:29:24,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:29:24,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:29:24,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:29:24,720 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 35 states. [2018-09-30 20:29:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:24,923 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-30 20:29:24,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:29:24,923 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-30 20:29:24,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:24,923 INFO L225 Difference]: With dead ends: 73 [2018-09-30 20:29:24,923 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 20:29:24,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:29:24,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 20:29:24,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 20:29:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 20:29:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-09-30 20:29:24,927 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2018-09-30 20:29:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:24,927 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-09-30 20:29:24,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:29:24,927 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-09-30 20:29:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 20:29:24,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:24,928 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1] [2018-09-30 20:29:24,928 INFO L423 AbstractCegarLoop]: === Iteration 97 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:24,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:24,928 INFO L82 PathProgramCache]: Analyzing trace with hash 90122439, now seen corresponding path program 94 times [2018-09-30 20:29:24,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:24,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:24,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:24,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:24,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:25,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:25,720 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 [2018-09-30 20:29:25,729 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:29:25,770 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:29:25,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:25,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:25,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:25,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 20:29:25,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:29:25,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:29:25,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:29:25,815 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 35 states. [2018-09-30 20:29:27,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:27,175 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-09-30 20:29:27,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:29:27,176 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2018-09-30 20:29:27,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:27,177 INFO L225 Difference]: With dead ends: 107 [2018-09-30 20:29:27,177 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 20:29:27,177 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 [2018-09-30 20:29:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 20:29:27,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2018-09-30 20:29:27,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 20:29:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-09-30 20:29:27,181 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2018-09-30 20:29:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:27,182 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-09-30 20:29:27,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:29:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-09-30 20:29:27,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 20:29:27,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:27,182 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-09-30 20:29:27,182 INFO L423 AbstractCegarLoop]: === Iteration 98 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:27,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:27,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1501233209, now seen corresponding path program 95 times [2018-09-30 20:29:27,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:27,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:27,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:27,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:27,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:27,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:27,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:27,638 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:29:27,689 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 20:29:27,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:27,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:27,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:27,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 20:29:27,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:29:27,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:29:27,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:29:27,728 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 36 states. [2018-09-30 20:29:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:28,046 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-09-30 20:29:28,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:29:28,047 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-30 20:29:28,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:28,048 INFO L225 Difference]: With dead ends: 108 [2018-09-30 20:29:28,048 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 20:29:28,048 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 [2018-09-30 20:29:28,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 20:29:28,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 20:29:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 20:29:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-30 20:29:28,054 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 70 [2018-09-30 20:29:28,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:28,054 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-30 20:29:28,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:29:28,054 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-30 20:29:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 20:29:28,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:28,055 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-09-30 20:29:28,055 INFO L423 AbstractCegarLoop]: === Iteration 99 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:28,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:28,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1961933165, now seen corresponding path program 96 times [2018-09-30 20:29:28,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:28,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:28,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:28,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:28,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:28,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:28,532 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 [2018-09-30 20:29:28,539 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:29:28,589 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-09-30 20:29:28,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:28,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:28,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:28,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 20:29:28,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:29:28,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:29:28,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:29:28,623 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-09-30 20:29:28,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:28,736 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-09-30 20:29:28,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:29:28,736 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-30 20:29:28,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:28,737 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:29:28,737 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 20:29:28,737 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 [2018-09-30 20:29:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 20:29:28,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 20:29:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 20:29:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-09-30 20:29:28,743 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2018-09-30 20:29:28,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:28,743 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-09-30 20:29:28,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:29:28,743 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-09-30 20:29:28,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 20:29:28,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:28,744 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1] [2018-09-30 20:29:28,744 INFO L423 AbstractCegarLoop]: === Iteration 100 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:28,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:28,744 INFO L82 PathProgramCache]: Analyzing trace with hash 690324449, now seen corresponding path program 97 times [2018-09-30 20:29:28,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:28,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:28,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:28,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:28,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:29,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:29,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:29,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:29,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:29,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:29,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 20:29:29,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:29:29,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:29:29,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:29:29,692 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 36 states. [2018-09-30 20:29:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:31,276 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-30 20:29:31,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:29:31,277 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2018-09-30 20:29:31,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:31,278 INFO L225 Difference]: With dead ends: 110 [2018-09-30 20:29:31,278 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 20:29:31,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:29:31,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 20:29:31,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 74. [2018-09-30 20:29:31,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 20:29:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2018-09-30 20:29:31,284 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2018-09-30 20:29:31,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:31,284 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2018-09-30 20:29:31,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:29:31,284 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2018-09-30 20:29:31,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 20:29:31,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:31,284 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-09-30 20:29:31,285 INFO L423 AbstractCegarLoop]: === Iteration 101 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:31,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:31,285 INFO L82 PathProgramCache]: Analyzing trace with hash -74840083, now seen corresponding path program 98 times [2018-09-30 20:29:31,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:31,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:31,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:31,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:31,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:31,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:31,745 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 [2018-09-30 20:29:31,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:29:31,795 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:29:31,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:31,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:31,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:31,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 20:29:31,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:29:31,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:29:31,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:29:31,844 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2018-09-30 20:29:32,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:32,156 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-09-30 20:29:32,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:29:32,156 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-30 20:29:32,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:32,157 INFO L225 Difference]: With dead ends: 111 [2018-09-30 20:29:32,157 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 20:29:32,157 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 [2018-09-30 20:29:32,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 20:29:32,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 20:29:32,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 20:29:32,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-30 20:29:32,161 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 72 [2018-09-30 20:29:32,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:32,161 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-30 20:29:32,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:29:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-30 20:29:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 20:29:32,162 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:32,162 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-09-30 20:29:32,162 INFO L423 AbstractCegarLoop]: === Iteration 102 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:32,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:32,162 INFO L82 PathProgramCache]: Analyzing trace with hash -90864889, now seen corresponding path program 99 times [2018-09-30 20:29:32,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:32,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:32,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:32,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:32,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:32,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:32,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:32,701 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:29:32,752 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 20:29:32,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:32,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:32,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:32,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 20:29:32,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:29:32,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:29:32,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:29:32,788 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 37 states. [2018-09-30 20:29:32,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:32,907 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-30 20:29:32,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:29:32,908 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-30 20:29:32,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:32,908 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:29:32,909 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 20:29:32,909 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 [2018-09-30 20:29:32,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 20:29:32,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 20:29:32,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 20:29:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-09-30 20:29:32,914 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2018-09-30 20:29:32,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:32,914 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-09-30 20:29:32,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:29:32,914 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-09-30 20:29:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 20:29:32,914 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:32,915 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1] [2018-09-30 20:29:32,915 INFO L423 AbstractCegarLoop]: === Iteration 103 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:32,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:32,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1478094215, now seen corresponding path program 100 times [2018-09-30 20:29:32,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:32,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:32,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:32,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:32,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:33,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:33,598 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 [2018-09-30 20:29:33,606 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:29:33,652 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:29:33,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:33,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:33,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:33,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 20:29:33,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:29:33,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:29:33,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:29:33,693 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 37 states. [2018-09-30 20:29:35,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:35,316 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-09-30 20:29:35,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:29:35,316 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2018-09-30 20:29:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:35,317 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:29:35,318 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 20:29:35,318 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 [2018-09-30 20:29:35,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 20:29:35,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2018-09-30 20:29:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 20:29:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-30 20:29:35,323 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2018-09-30 20:29:35,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:35,323 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-30 20:29:35,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:29:35,323 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-30 20:29:35,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:29:35,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:35,323 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-09-30 20:29:35,323 INFO L423 AbstractCegarLoop]: === Iteration 104 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:35,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:35,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1423781113, now seen corresponding path program 101 times [2018-09-30 20:29:35,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:35,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:35,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:35,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:35,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:36,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:36,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:36,237 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:29:36,288 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 20:29:36,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:36,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:36,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:36,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 20:29:36,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:29:36,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:29:36,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:29:36,338 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 38 states. [2018-09-30 20:29:36,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:36,650 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-09-30 20:29:36,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:29:36,650 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-30 20:29:36,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:36,651 INFO L225 Difference]: With dead ends: 114 [2018-09-30 20:29:36,651 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 20:29:36,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:29:36,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 20:29:36,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 20:29:36,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 20:29:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-30 20:29:36,658 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 74 [2018-09-30 20:29:36,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:36,658 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-30 20:29:36,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:29:36,658 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-30 20:29:36,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:29:36,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:36,659 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-09-30 20:29:36,659 INFO L423 AbstractCegarLoop]: === Iteration 105 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:36,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:36,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1920550099, now seen corresponding path program 102 times [2018-09-30 20:29:36,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:36,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:36,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:36,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:36,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:37,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:37,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:37,255 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:29:37,305 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:29:37,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:37,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:37,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:37,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 20:29:37,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:29:37,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:29:37,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:29:37,345 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-09-30 20:29:37,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:37,451 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-09-30 20:29:37,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:29:37,452 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-30 20:29:37,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:37,453 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:29:37,453 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 20:29:37,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:29:37,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 20:29:37,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 20:29:37,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 20:29:37,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-09-30 20:29:37,459 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2018-09-30 20:29:37,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:37,459 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-09-30 20:29:37,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:29:37,460 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-09-30 20:29:37,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 20:29:37,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:37,460 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1] [2018-09-30 20:29:37,460 INFO L423 AbstractCegarLoop]: === Iteration 106 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:37,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:37,461 INFO L82 PathProgramCache]: Analyzing trace with hash 592427553, now seen corresponding path program 103 times [2018-09-30 20:29:37,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:37,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:37,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:37,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:37,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:38,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:38,541 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 [2018-09-30 20:29:38,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:38,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:38,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:38,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 20:29:38,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:29:38,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:29:38,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:29:38,634 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 38 states. [2018-09-30 20:29:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:40,364 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-30 20:29:40,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:29:40,365 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2018-09-30 20:29:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:40,366 INFO L225 Difference]: With dead ends: 116 [2018-09-30 20:29:40,366 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 20:29:40,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:29:40,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 20:29:40,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2018-09-30 20:29:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 20:29:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2018-09-30 20:29:40,373 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2018-09-30 20:29:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:40,373 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2018-09-30 20:29:40,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:29:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2018-09-30 20:29:40,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 20:29:40,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:40,373 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-09-30 20:29:40,374 INFO L423 AbstractCegarLoop]: === Iteration 107 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:40,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:40,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1185323437, now seen corresponding path program 104 times [2018-09-30 20:29:40,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:40,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:40,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:40,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:40,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:40,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:40,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:40,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:29:40,932 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:29:40,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:40,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:40,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:40,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 20:29:40,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:29:40,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:29:40,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:29:40,984 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 39 states. [2018-09-30 20:29:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:41,296 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-09-30 20:29:41,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:29:41,296 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-30 20:29:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:41,297 INFO L225 Difference]: With dead ends: 117 [2018-09-30 20:29:41,297 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 20:29:41,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:29:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 20:29:41,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 20:29:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 20:29:41,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-30 20:29:41,302 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2018-09-30 20:29:41,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:41,302 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-30 20:29:41,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:29:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-30 20:29:41,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 20:29:41,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:41,303 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-09-30 20:29:41,303 INFO L423 AbstractCegarLoop]: === Iteration 108 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:41,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:41,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1329613241, now seen corresponding path program 105 times [2018-09-30 20:29:41,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:41,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:41,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:41,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:41,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:41,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:41,862 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 [2018-09-30 20:29:41,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:29:41,924 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-09-30 20:29:41,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:41,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:41,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:41,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 20:29:41,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:29:41,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:29:41,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:29:41,971 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 39 states. [2018-09-30 20:29:42,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:42,087 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-30 20:29:42,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:29:42,087 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-30 20:29:42,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:42,088 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:29:42,088 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 20:29:42,088 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 [2018-09-30 20:29:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 20:29:42,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 20:29:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 20:29:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-09-30 20:29:42,094 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2018-09-30 20:29:42,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:42,094 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-09-30 20:29:42,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:29:42,094 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-09-30 20:29:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 20:29:42,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:42,094 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1] [2018-09-30 20:29:42,095 INFO L423 AbstractCegarLoop]: === Iteration 109 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:42,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:42,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1731600967, now seen corresponding path program 106 times [2018-09-30 20:29:42,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:42,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:42,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:42,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:42,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:42,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:42,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:42,841 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:29:42,892 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:29:42,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:42,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:43,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:43,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 20:29:43,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:29:43,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:29:43,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:29:43,001 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 39 states. [2018-09-30 20:29:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:44,761 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-09-30 20:29:44,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:29:44,761 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2018-09-30 20:29:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:44,762 INFO L225 Difference]: With dead ends: 119 [2018-09-30 20:29:44,762 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 20:29:44,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:29:44,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 20:29:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-09-30 20:29:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 20:29:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-09-30 20:29:44,768 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2018-09-30 20:29:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:44,768 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-09-30 20:29:44,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:29:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-09-30 20:29:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 20:29:44,769 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:44,769 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-09-30 20:29:44,769 INFO L423 AbstractCegarLoop]: === Iteration 110 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:44,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:44,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2139960903, now seen corresponding path program 107 times [2018-09-30 20:29:44,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:44,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:44,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:44,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:44,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:45,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:45,441 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 [2018-09-30 20:29:45,448 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:29:45,505 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-09-30 20:29:45,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:45,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:45,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:45,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 20:29:45,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:29:45,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:29:45,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:29:45,558 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2018-09-30 20:29:45,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:45,993 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-09-30 20:29:45,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:29:45,993 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-30 20:29:45,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:45,994 INFO L225 Difference]: With dead ends: 120 [2018-09-30 20:29:45,994 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 20:29:45,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:29:45,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 20:29:45,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 20:29:45,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 20:29:45,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-30 20:29:45,999 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 78 [2018-09-30 20:29:45,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:45,999 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-30 20:29:45,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:29:46,000 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-30 20:29:46,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 20:29:46,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:46,000 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-09-30 20:29:46,000 INFO L423 AbstractCegarLoop]: === Iteration 111 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:46,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:46,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1486335213, now seen corresponding path program 108 times [2018-09-30 20:29:46,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:46,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:46,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:46,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:46,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:46,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:46,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:46,601 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:29:46,655 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-30 20:29:46,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:46,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:46,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:46,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 20:29:46,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:29:46,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:29:46,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:29:46,694 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-09-30 20:29:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:46,816 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-09-30 20:29:46,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:29:46,817 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-30 20:29:46,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:46,817 INFO L225 Difference]: With dead ends: 83 [2018-09-30 20:29:46,817 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 20:29:46,818 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 [2018-09-30 20:29:46,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 20:29:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 20:29:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 20:29:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-09-30 20:29:46,824 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2018-09-30 20:29:46,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:46,824 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-09-30 20:29:46,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:29:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-09-30 20:29:46,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 20:29:46,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:46,825 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1] [2018-09-30 20:29:46,825 INFO L423 AbstractCegarLoop]: === Iteration 112 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:46,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:46,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1168310175, now seen corresponding path program 109 times [2018-09-30 20:29:46,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:46,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:46,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:46,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:46,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:47,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:47,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:47,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:47,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:47,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:47,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 20:29:47,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:29:47,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:29:47,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:29:47,720 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 40 states. [2018-09-30 20:29:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:49,454 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-30 20:29:49,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:29:49,455 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2018-09-30 20:29:49,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:49,455 INFO L225 Difference]: With dead ends: 122 [2018-09-30 20:29:49,456 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 20:29:49,456 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 [2018-09-30 20:29:49,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 20:29:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2018-09-30 20:29:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 20:29:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-09-30 20:29:49,465 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2018-09-30 20:29:49,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:49,466 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-09-30 20:29:49,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:29:49,466 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-09-30 20:29:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 20:29:49,466 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:49,466 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-09-30 20:29:49,467 INFO L423 AbstractCegarLoop]: === Iteration 113 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:49,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:49,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1857938579, now seen corresponding path program 110 times [2018-09-30 20:29:49,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:49,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:49,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:49,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:49,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:50,114 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:50,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:50,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:29:50,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:29:50,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:50,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:50,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:50,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 20:29:50,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:29:50,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:29:50,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:29:50,204 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2018-09-30 20:29:50,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:50,652 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-09-30 20:29:50,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:29:50,652 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-30 20:29:50,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:50,653 INFO L225 Difference]: With dead ends: 123 [2018-09-30 20:29:50,653 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 20:29:50,654 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 [2018-09-30 20:29:50,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 20:29:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 20:29:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 20:29:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-30 20:29:50,658 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 80 [2018-09-30 20:29:50,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:50,658 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-30 20:29:50,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:29:50,658 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-30 20:29:50,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 20:29:50,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:50,659 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-09-30 20:29:50,659 INFO L423 AbstractCegarLoop]: === Iteration 114 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:50,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:50,659 INFO L82 PathProgramCache]: Analyzing trace with hash -645498489, now seen corresponding path program 111 times [2018-09-30 20:29:50,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:50,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:50,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:50,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:50,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:51,269 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:51,269 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 [2018-09-30 20:29:51,291 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:29:51,377 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-09-30 20:29:51,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:51,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:51,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:51,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 20:29:51,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:29:51,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:29:51,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:29:51,414 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 41 states. [2018-09-30 20:29:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:51,524 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-30 20:29:51,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:29:51,525 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-30 20:29:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:51,525 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:29:51,525 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 20:29:51,526 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 [2018-09-30 20:29:51,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 20:29:51,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 20:29:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 20:29:51,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-09-30 20:29:51,531 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2018-09-30 20:29:51,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:51,531 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-09-30 20:29:51,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:29:51,531 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-09-30 20:29:51,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 20:29:51,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:51,532 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1] [2018-09-30 20:29:51,532 INFO L423 AbstractCegarLoop]: === Iteration 115 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:51,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:51,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1464321799, now seen corresponding path program 112 times [2018-09-30 20:29:51,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:51,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:51,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:51,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:51,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:52,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:52,370 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 [2018-09-30 20:29:52,376 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:29:52,426 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:29:52,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:52,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:52,468 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:52,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 20:29:52,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:29:52,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:29:52,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:29:52,469 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 41 states. [2018-09-30 20:29:54,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:54,289 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-09-30 20:29:54,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:29:54,290 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2018-09-30 20:29:54,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:54,290 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:29:54,290 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 20:29:54,291 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 [2018-09-30 20:29:54,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 20:29:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2018-09-30 20:29:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 20:29:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-09-30 20:29:54,296 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2018-09-30 20:29:54,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:54,296 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-09-30 20:29:54,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:29:54,296 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-09-30 20:29:54,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 20:29:54,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:54,296 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-09-30 20:29:54,297 INFO L423 AbstractCegarLoop]: === Iteration 116 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:54,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:54,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1850726009, now seen corresponding path program 113 times [2018-09-30 20:29:54,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:54,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:54,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:54,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:54,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:54,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:54,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:54,981 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:29:55,042 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-09-30 20:29:55,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:55,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:55,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:55,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 20:29:55,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:29:55,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:29:55,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:29:55,079 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 42 states. [2018-09-30 20:29:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:55,569 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-09-30 20:29:55,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:29:55,569 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-30 20:29:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:55,570 INFO L225 Difference]: With dead ends: 126 [2018-09-30 20:29:55,570 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 20:29:55,571 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 [2018-09-30 20:29:55,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 20:29:55,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 20:29:55,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 20:29:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-30 20:29:55,577 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 82 [2018-09-30 20:29:55,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:55,577 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-30 20:29:55,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:29:55,577 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-30 20:29:55,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 20:29:55,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:55,578 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-09-30 20:29:55,578 INFO L423 AbstractCegarLoop]: === Iteration 117 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:55,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:55,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1375178413, now seen corresponding path program 114 times [2018-09-30 20:29:55,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:55,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:55,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:55,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:55,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:56,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:56,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:56,266 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:29:56,321 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-09-30 20:29:56,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:56,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:56,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:56,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 20:29:56,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:29:56,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:29:56,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:29:56,358 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-09-30 20:29:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:56,468 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-09-30 20:29:56,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:29:56,469 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-30 20:29:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:56,469 INFO L225 Difference]: With dead ends: 87 [2018-09-30 20:29:56,469 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 20:29:56,470 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 [2018-09-30 20:29:56,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 20:29:56,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 20:29:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 20:29:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-09-30 20:29:56,475 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 82 [2018-09-30 20:29:56,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:56,475 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-09-30 20:29:56,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:29:56,475 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-09-30 20:29:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 20:29:56,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:56,476 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1] [2018-09-30 20:29:56,476 INFO L423 AbstractCegarLoop]: === Iteration 118 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:56,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:56,476 INFO L82 PathProgramCache]: Analyzing trace with hash -319203679, now seen corresponding path program 115 times [2018-09-30 20:29:56,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:56,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:56,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:56,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:56,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:57,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:57,322 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 [2018-09-30 20:29:57,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:57,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:57,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:57,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 20:29:57,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:29:57,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:29:57,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:29:57,425 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 42 states. [2018-09-30 20:29:59,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:59,334 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-09-30 20:29:59,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:29:59,335 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2018-09-30 20:29:59,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:59,335 INFO L225 Difference]: With dead ends: 128 [2018-09-30 20:29:59,336 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 20:29:59,336 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 [2018-09-30 20:29:59,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 20:29:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2018-09-30 20:29:59,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 20:29:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-30 20:29:59,341 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-09-30 20:29:59,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:59,341 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-30 20:29:59,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:29:59,341 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-30 20:29:59,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 20:29:59,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:59,342 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-09-30 20:29:59,342 INFO L423 AbstractCegarLoop]: === Iteration 119 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:59,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:59,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1305440979, now seen corresponding path program 116 times [2018-09-30 20:29:59,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:59,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:59,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:59,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:59,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:59,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:59,975 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 [2018-09-30 20:29:59,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:30:00,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:30:00,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:00,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:00,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:00,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 20:30:00,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:30:00,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:30:00,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:30:00,067 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 43 states. [2018-09-30 20:30:00,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:00,384 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-09-30 20:30:00,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:30:00,385 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-30 20:30:00,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:00,385 INFO L225 Difference]: With dead ends: 129 [2018-09-30 20:30:00,386 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 20:30:00,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:30:00,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 20:30:00,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 20:30:00,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 20:30:00,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-30 20:30:00,391 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2018-09-30 20:30:00,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:00,391 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-30 20:30:00,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:30:00,392 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-30 20:30:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 20:30:00,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:00,392 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-09-30 20:30:00,392 INFO L423 AbstractCegarLoop]: === Iteration 120 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:00,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:00,393 INFO L82 PathProgramCache]: Analyzing trace with hash -86651705, now seen corresponding path program 117 times [2018-09-30 20:30:00,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:00,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:00,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:00,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:00,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:01,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:01,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:01,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:30:01,175 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:30:01,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 20:30:01,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:01,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:01,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:01,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 20:30:01,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:30:01,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:30:01,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:30:01,275 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 43 states. [2018-09-30 20:30:01,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:01,408 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-30 20:30:01,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:30:01,408 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-30 20:30:01,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:01,409 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:30:01,409 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 20:30:01,410 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 [2018-09-30 20:30:01,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 20:30:01,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 20:30:01,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 20:30:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-09-30 20:30:01,416 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2018-09-30 20:30:01,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:01,416 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-09-30 20:30:01,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:30:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-09-30 20:30:01,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 20:30:01,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:01,417 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1] [2018-09-30 20:30:01,417 INFO L423 AbstractCegarLoop]: === Iteration 121 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:01,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:01,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1608702919, now seen corresponding path program 118 times [2018-09-30 20:30:01,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:01,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:01,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:01,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:01,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:02,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:02,315 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 [2018-09-30 20:30:02,322 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:30:02,370 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:30:02,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:02,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:02,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:02,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 20:30:02,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:30:02,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:30:02,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:30:02,413 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 43 states. [2018-09-30 20:30:04,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:04,420 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-09-30 20:30:04,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:30:04,420 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2018-09-30 20:30:04,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:04,421 INFO L225 Difference]: With dead ends: 131 [2018-09-30 20:30:04,421 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 20:30:04,421 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 [2018-09-30 20:30:04,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 20:30:04,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 88. [2018-09-30 20:30:04,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 20:30:04,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-09-30 20:30:04,428 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2018-09-30 20:30:04,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:04,428 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-09-30 20:30:04,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:30:04,428 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-09-30 20:30:04,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 20:30:04,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:04,429 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-09-30 20:30:04,429 INFO L423 AbstractCegarLoop]: === Iteration 122 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:04,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:04,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1669878585, now seen corresponding path program 119 times [2018-09-30 20:30:04,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:04,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:04,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:04,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:04,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:05,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:05,097 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 [2018-09-30 20:30:05,104 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:30:05,165 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 20:30:05,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:05,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:05,218 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:05,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 20:30:05,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:30:05,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:30:05,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:30:05,219 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 44 states. [2018-09-30 20:30:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:05,634 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-09-30 20:30:05,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:30:05,635 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-30 20:30:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:05,635 INFO L225 Difference]: With dead ends: 132 [2018-09-30 20:30:05,635 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 20:30:05,636 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 [2018-09-30 20:30:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 20:30:05,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 20:30:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 20:30:05,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-30 20:30:05,642 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 86 [2018-09-30 20:30:05,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:05,642 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-30 20:30:05,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:30:05,643 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-30 20:30:05,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 20:30:05,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:05,643 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-09-30 20:30:05,643 INFO L423 AbstractCegarLoop]: === Iteration 123 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:05,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:05,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1752850541, now seen corresponding path program 120 times [2018-09-30 20:30:05,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:05,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:05,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:05,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:05,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:06,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:06,347 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 [2018-09-30 20:30:06,353 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:30:06,415 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 20:30:06,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:06,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:06,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:06,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 20:30:06,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:30:06,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:30:06,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:30:06,458 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-09-30 20:30:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:06,582 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-09-30 20:30:06,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:30:06,582 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-30 20:30:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:06,583 INFO L225 Difference]: With dead ends: 91 [2018-09-30 20:30:06,583 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 20:30:06,583 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 [2018-09-30 20:30:06,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 20:30:06,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 20:30:06,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 20:30:06,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-09-30 20:30:06,590 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 86 [2018-09-30 20:30:06,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:06,590 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-09-30 20:30:06,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:30:06,590 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-09-30 20:30:06,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 20:30:06,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:06,591 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1] [2018-09-30 20:30:06,591 INFO L423 AbstractCegarLoop]: === Iteration 124 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:06,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:06,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1496269599, now seen corresponding path program 121 times [2018-09-30 20:30:06,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:06,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:06,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:06,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:06,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:07,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:07,533 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 [2018-09-30 20:30:07,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:30:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:07,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:07,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:07,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 20:30:07,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:30:07,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:30:07,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:30:07,647 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 44 states. [2018-09-30 20:30:09,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:09,770 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-09-30 20:30:09,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:30:09,770 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2018-09-30 20:30:09,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:09,771 INFO L225 Difference]: With dead ends: 134 [2018-09-30 20:30:09,771 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 20:30:09,772 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 [2018-09-30 20:30:09,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 20:30:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2018-09-30 20:30:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 20:30:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-09-30 20:30:09,777 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2018-09-30 20:30:09,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:09,777 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-09-30 20:30:09,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:30:09,777 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-09-30 20:30:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 20:30:09,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:09,777 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-09-30 20:30:09,777 INFO L423 AbstractCegarLoop]: === Iteration 125 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:09,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:09,778 INFO L82 PathProgramCache]: Analyzing trace with hash 860221165, now seen corresponding path program 122 times [2018-09-30 20:30:09,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:09,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:09,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:09,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:30:09,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:10,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:10,469 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 [2018-09-30 20:30:10,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:30:10,526 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:30:10,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:10,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:10,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:10,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 20:30:10,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:30:10,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:30:10,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:30:10,579 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 45 states. [2018-09-30 20:30:11,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:11,195 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-09-30 20:30:11,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:30:11,196 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-30 20:30:11,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:11,196 INFO L225 Difference]: With dead ends: 135 [2018-09-30 20:30:11,197 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 20:30:11,197 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 [2018-09-30 20:30:11,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 20:30:11,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 20:30:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 20:30:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-30 20:30:11,203 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 88 [2018-09-30 20:30:11,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:11,203 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-30 20:30:11,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:30:11,203 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-30 20:30:11,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 20:30:11,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:11,204 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-09-30 20:30:11,204 INFO L423 AbstractCegarLoop]: === Iteration 126 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:11,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:11,204 INFO L82 PathProgramCache]: Analyzing trace with hash -409358329, now seen corresponding path program 123 times [2018-09-30 20:30:11,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:11,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:11,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:11,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:11,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:12,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:12,092 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 [2018-09-30 20:30:12,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:30:12,159 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 20:30:12,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:12,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:12,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:12,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 20:30:12,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:30:12,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:30:12,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:30:12,198 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 45 states. [2018-09-30 20:30:12,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:12,318 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-30 20:30:12,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:30:12,321 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-30 20:30:12,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:12,321 INFO L225 Difference]: With dead ends: 93 [2018-09-30 20:30:12,321 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 20:30:12,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:30:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 20:30:12,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 20:30:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 20:30:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-09-30 20:30:12,326 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2018-09-30 20:30:12,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:12,327 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-09-30 20:30:12,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:30:12,327 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-09-30 20:30:12,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 20:30:12,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:12,327 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1] [2018-09-30 20:30:12,327 INFO L423 AbstractCegarLoop]: === Iteration 127 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:12,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:12,328 INFO L82 PathProgramCache]: Analyzing trace with hash 194732167, now seen corresponding path program 124 times [2018-09-30 20:30:12,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:12,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:12,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:12,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:12,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:13,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:13,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:30:13,294 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:30:13,349 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:30:13,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:13,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:13,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:13,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 20:30:13,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:30:13,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:30:13,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:30:13,392 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 45 states. [2018-09-30 20:30:15,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:15,604 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-09-30 20:30:15,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:30:15,604 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2018-09-30 20:30:15,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:15,605 INFO L225 Difference]: With dead ends: 137 [2018-09-30 20:30:15,605 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 20:30:15,606 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 [2018-09-30 20:30:15,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 20:30:15,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2018-09-30 20:30:15,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 20:30:15,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-09-30 20:30:15,611 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-09-30 20:30:15,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:15,611 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-09-30 20:30:15,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:30:15,611 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-09-30 20:30:15,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 20:30:15,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:15,612 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-09-30 20:30:15,612 INFO L423 AbstractCegarLoop]: === Iteration 128 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:15,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:15,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1741668359, now seen corresponding path program 125 times [2018-09-30 20:30:15,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:15,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:15,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:15,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:15,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:16,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:16,310 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 [2018-09-30 20:30:16,318 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:30:16,386 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-09-30 20:30:16,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:16,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:16,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:16,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 20:30:16,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:30:16,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:30:16,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:30:16,426 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 46 states. [2018-09-30 20:30:16,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:16,989 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-09-30 20:30:16,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:30:16,989 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-30 20:30:16,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:16,990 INFO L225 Difference]: With dead ends: 138 [2018-09-30 20:30:16,990 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 20:30:16,991 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 [2018-09-30 20:30:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 20:30:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 20:30:16,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 20:30:16,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-30 20:30:16,996 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 90 [2018-09-30 20:30:16,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:16,996 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-30 20:30:16,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:30:16,997 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-30 20:30:16,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 20:30:16,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:16,997 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-09-30 20:30:16,997 INFO L423 AbstractCegarLoop]: === Iteration 129 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:16,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:16,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1039409709, now seen corresponding path program 126 times [2018-09-30 20:30:16,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:16,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:16,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:16,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:16,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:17,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:17,735 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 [2018-09-30 20:30:17,747 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:30:17,809 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-09-30 20:30:17,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:17,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:17,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:17,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 20:30:17,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:30:17,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:30:17,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:30:17,848 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-09-30 20:30:17,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:17,977 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2018-09-30 20:30:17,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:30:17,978 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-30 20:30:17,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:17,979 INFO L225 Difference]: With dead ends: 95 [2018-09-30 20:30:17,979 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 20:30:17,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:30:17,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 20:30:17,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 20:30:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 20:30:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-09-30 20:30:17,985 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 90 [2018-09-30 20:30:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:17,986 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-09-30 20:30:17,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:30:17,986 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-09-30 20:30:17,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 20:30:17,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:17,986 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1] [2018-09-30 20:30:17,986 INFO L423 AbstractCegarLoop]: === Iteration 130 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:17,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:17,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2138098911, now seen corresponding path program 127 times [2018-09-30 20:30:17,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:17,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:17,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:17,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:17,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:19,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:19,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:30:19,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:30:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:19,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:19,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:19,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 20:30:19,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:30:19,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:30:19,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:30:19,126 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 46 states. [2018-09-30 20:30:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:21,435 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-30 20:30:21,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:30:21,436 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2018-09-30 20:30:21,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:21,436 INFO L225 Difference]: With dead ends: 140 [2018-09-30 20:30:21,436 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 20:30:21,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:30:21,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 20:30:21,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2018-09-30 20:30:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 20:30:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-09-30 20:30:21,442 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2018-09-30 20:30:21,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:21,443 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-09-30 20:30:21,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:30:21,443 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-09-30 20:30:21,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 20:30:21,443 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:21,443 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-09-30 20:30:21,443 INFO L423 AbstractCegarLoop]: === Iteration 131 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:21,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:21,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1856618323, now seen corresponding path program 128 times [2018-09-30 20:30:21,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:21,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:21,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:21,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:30:21,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:22,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:22,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:30:22,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:30:22,220 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:30:22,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:22,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:22,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:22,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 20:30:22,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:30:22,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:30:22,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:30:22,259 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 47 states. [2018-09-30 20:30:22,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:22,861 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-09-30 20:30:22,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:30:22,861 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-30 20:30:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:22,862 INFO L225 Difference]: With dead ends: 141 [2018-09-30 20:30:22,862 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 20:30:22,862 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 [2018-09-30 20:30:22,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 20:30:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 20:30:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 20:30:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-30 20:30:22,868 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 92 [2018-09-30 20:30:22,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:22,868 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-30 20:30:22,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:30:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-30 20:30:22,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 20:30:22,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:22,869 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-09-30 20:30:22,869 INFO L423 AbstractCegarLoop]: === Iteration 132 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:22,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:22,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2143167303, now seen corresponding path program 129 times [2018-09-30 20:30:22,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:22,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:22,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:22,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:22,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:23,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:23,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:30:23,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:30:23,731 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-30 20:30:23,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:23,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:23,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:23,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 20:30:23,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:30:23,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:30:23,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:30:23,771 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 47 states. [2018-09-30 20:30:23,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:23,903 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-30 20:30:23,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:30:23,903 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-30 20:30:23,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:23,904 INFO L225 Difference]: With dead ends: 97 [2018-09-30 20:30:23,904 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 20:30:23,904 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 [2018-09-30 20:30:23,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 20:30:23,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 20:30:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 20:30:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-09-30 20:30:23,912 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2018-09-30 20:30:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:23,912 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-09-30 20:30:23,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:30:23,912 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-09-30 20:30:23,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 20:30:23,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:23,913 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1] [2018-09-30 20:30:23,913 INFO L423 AbstractCegarLoop]: === Iteration 133 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:23,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:23,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2013615431, now seen corresponding path program 130 times [2018-09-30 20:30:23,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:23,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:23,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:23,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:23,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:24,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:24,973 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 [2018-09-30 20:30:24,980 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:30:25,038 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:30:25,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:25,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:25,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:25,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 20:30:25,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:30:25,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:30:25,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:30:25,085 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 47 states. [2018-09-30 20:30:27,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:27,496 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2018-09-30 20:30:27,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:30:27,496 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2018-09-30 20:30:27,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:27,497 INFO L225 Difference]: With dead ends: 143 [2018-09-30 20:30:27,497 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 20:30:27,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:30:27,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 20:30:27,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2018-09-30 20:30:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 20:30:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-09-30 20:30:27,503 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2018-09-30 20:30:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:27,503 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-09-30 20:30:27,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:30:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-09-30 20:30:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 20:30:27,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:27,504 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-09-30 20:30:27,504 INFO L423 AbstractCegarLoop]: === Iteration 134 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:27,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:27,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2002492601, now seen corresponding path program 131 times [2018-09-30 20:30:27,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:27,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:27,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:27,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:27,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:28,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:28,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:30:28,300 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:30:28,373 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 20:30:28,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:28,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:28,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:28,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 20:30:28,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:30:28,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:30:28,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:30:28,413 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2018-09-30 20:30:28,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:28,802 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2018-09-30 20:30:28,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:30:28,802 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-30 20:30:28,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:28,803 INFO L225 Difference]: With dead ends: 144 [2018-09-30 20:30:28,803 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 20:30:28,803 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 [2018-09-30 20:30:28,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 20:30:28,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 20:30:28,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 20:30:28,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-30 20:30:28,809 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 94 [2018-09-30 20:30:28,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:28,809 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-30 20:30:28,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:30:28,809 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-30 20:30:28,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 20:30:28,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:28,810 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-09-30 20:30:28,810 INFO L423 AbstractCegarLoop]: === Iteration 135 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:28,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:28,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1731777517, now seen corresponding path program 132 times [2018-09-30 20:30:28,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:28,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:28,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:28,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:28,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:29,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:29,638 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 [2018-09-30 20:30:29,645 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:30:29,715 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-09-30 20:30:29,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:29,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:29,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:29,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 20:30:29,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:30:29,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:30:29,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:30:29,753 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-09-30 20:30:29,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:29,884 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2018-09-30 20:30:29,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:30:29,885 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-30 20:30:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:29,885 INFO L225 Difference]: With dead ends: 99 [2018-09-30 20:30:29,885 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 20:30:29,886 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 [2018-09-30 20:30:29,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 20:30:29,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 20:30:29,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 20:30:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-09-30 20:30:29,899 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 94 [2018-09-30 20:30:29,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:29,899 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-09-30 20:30:29,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:30:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-09-30 20:30:29,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 20:30:29,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:29,899 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1] [2018-09-30 20:30:29,900 INFO L423 AbstractCegarLoop]: === Iteration 136 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:29,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:29,900 INFO L82 PathProgramCache]: Analyzing trace with hash 2145433953, now seen corresponding path program 133 times [2018-09-30 20:30:29,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:29,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:29,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:29,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:29,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:30,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:30,972 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 [2018-09-30 20:30:30,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:30:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:31,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:31,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:31,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 20:30:31,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:30:31,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:30:31,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:30:31,081 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 48 states. [2018-09-30 20:30:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:33,591 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-09-30 20:30:33,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:30:33,591 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2018-09-30 20:30:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:33,592 INFO L225 Difference]: With dead ends: 146 [2018-09-30 20:30:33,592 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 20:30:33,593 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 [2018-09-30 20:30:33,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 20:30:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2018-09-30 20:30:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 20:30:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2018-09-30 20:30:33,598 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2018-09-30 20:30:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:33,598 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2018-09-30 20:30:33,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:30:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2018-09-30 20:30:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 20:30:33,599 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:33,599 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-09-30 20:30:33,599 INFO L423 AbstractCegarLoop]: === Iteration 137 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:33,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:33,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2083881581, now seen corresponding path program 134 times [2018-09-30 20:30:33,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:33,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:33,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:33,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:30:33,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:34,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:34,381 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 [2018-09-30 20:30:34,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:30:34,444 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:30:34,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:34,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:34,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:34,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 20:30:34,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:30:34,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:30:34,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:30:34,491 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2018-09-30 20:30:35,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:35,141 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-09-30 20:30:35,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:30:35,141 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-30 20:30:35,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:35,142 INFO L225 Difference]: With dead ends: 147 [2018-09-30 20:30:35,142 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 20:30:35,142 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 [2018-09-30 20:30:35,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 20:30:35,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 20:30:35,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 20:30:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-30 20:30:35,148 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 96 [2018-09-30 20:30:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:35,149 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-30 20:30:35,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:30:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-30 20:30:35,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 20:30:35,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:35,149 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-09-30 20:30:35,149 INFO L423 AbstractCegarLoop]: === Iteration 138 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:35,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:35,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1882138247, now seen corresponding path program 135 times [2018-09-30 20:30:35,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:35,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:35,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:35,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:35,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:36,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:36,049 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 [2018-09-30 20:30:36,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:30:36,126 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 20:30:36,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:36,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:36,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:36,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 20:30:36,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:30:36,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:30:36,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:30:36,169 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 49 states. [2018-09-30 20:30:36,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:36,327 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-30 20:30:36,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:30:36,327 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-30 20:30:36,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:36,328 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:30:36,328 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 20:30:36,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:30:36,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 20:30:36,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 20:30:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 20:30:36,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-09-30 20:30:36,335 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2018-09-30 20:30:36,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:36,335 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-09-30 20:30:36,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:30:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-09-30 20:30:36,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 20:30:36,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:36,335 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1] [2018-09-30 20:30:36,336 INFO L423 AbstractCegarLoop]: === Iteration 139 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:36,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:36,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1783318009, now seen corresponding path program 136 times [2018-09-30 20:30:36,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:36,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:36,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:36,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:36,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:37,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:37,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:30:37,469 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:30:37,527 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:30:37,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:37,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:37,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:37,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 20:30:37,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:30:37,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:30:37,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:30:37,574 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 49 states. [2018-09-30 20:30:40,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:40,196 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-09-30 20:30:40,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:30:40,196 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 97 [2018-09-30 20:30:40,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:40,197 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:30:40,197 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 20:30:40,198 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 [2018-09-30 20:30:40,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 20:30:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2018-09-30 20:30:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 20:30:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-30 20:30:40,203 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2018-09-30 20:30:40,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:40,204 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-30 20:30:40,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:30:40,204 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-30 20:30:40,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 20:30:40,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:40,204 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-09-30 20:30:40,204 INFO L423 AbstractCegarLoop]: === Iteration 140 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:40,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:40,204 INFO L82 PathProgramCache]: Analyzing trace with hash 551655047, now seen corresponding path program 137 times [2018-09-30 20:30:40,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:40,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:40,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:40,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:40,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:41,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:41,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:30:41,034 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:30:41,120 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 20:30:41,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:41,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:41,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:41,174 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 20:30:41,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:30:41,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:30:41,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:30:41,175 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 50 states. [2018-09-30 20:30:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:41,864 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-09-30 20:30:41,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:30:41,864 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-30 20:30:41,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:41,865 INFO L225 Difference]: With dead ends: 150 [2018-09-30 20:30:41,865 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 20:30:41,865 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 [2018-09-30 20:30:41,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 20:30:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 20:30:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 20:30:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-30 20:30:41,871 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 98 [2018-09-30 20:30:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:41,871 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-30 20:30:41,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:30:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-30 20:30:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 20:30:41,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:41,871 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-09-30 20:30:41,872 INFO L423 AbstractCegarLoop]: === Iteration 141 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:41,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:41,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1407421011, now seen corresponding path program 138 times [2018-09-30 20:30:41,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:41,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:41,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:41,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:41,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:42,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:42,748 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 [2018-09-30 20:30:42,755 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:30:42,823 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:30:42,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:42,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:42,864 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:42,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 20:30:42,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:30:42,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:30:42,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:30:42,865 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-09-30 20:30:43,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:43,032 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-09-30 20:30:43,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:30:43,033 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-30 20:30:43,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:43,033 INFO L225 Difference]: With dead ends: 103 [2018-09-30 20:30:43,033 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 20:30:43,034 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 [2018-09-30 20:30:43,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 20:30:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 20:30:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 20:30:43,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-09-30 20:30:43,040 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 98 [2018-09-30 20:30:43,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:43,040 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-09-30 20:30:43,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:30:43,040 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-09-30 20:30:43,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 20:30:43,040 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:43,040 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1] [2018-09-30 20:30:43,041 INFO L423 AbstractCegarLoop]: === Iteration 142 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:43,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:43,041 INFO L82 PathProgramCache]: Analyzing trace with hash -680439903, now seen corresponding path program 139 times [2018-09-30 20:30:43,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:43,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:43,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:43,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:43,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:44,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:44,199 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 [2018-09-30 20:30:44,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:30:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:44,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:44,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:44,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 20:30:44,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:30:44,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:30:44,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:30:44,313 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 50 states. [2018-09-30 20:30:47,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:47,052 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-09-30 20:30:47,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:30:47,053 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2018-09-30 20:30:47,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:47,053 INFO L225 Difference]: With dead ends: 152 [2018-09-30 20:30:47,053 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 20:30:47,054 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 [2018-09-30 20:30:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 20:30:47,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2018-09-30 20:30:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 20:30:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2018-09-30 20:30:47,060 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2018-09-30 20:30:47,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:47,060 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2018-09-30 20:30:47,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:30:47,060 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2018-09-30 20:30:47,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 20:30:47,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:47,060 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-09-30 20:30:47,061 INFO L423 AbstractCegarLoop]: === Iteration 143 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:47,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:47,061 INFO L82 PathProgramCache]: Analyzing trace with hash 381137965, now seen corresponding path program 140 times [2018-09-30 20:30:47,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:47,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:47,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:47,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:30:47,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:47,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:47,911 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 [2018-09-30 20:30:47,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:30:47,976 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:30:47,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:47,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:48,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:48,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 20:30:48,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:30:48,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:30:48,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:30:48,026 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 51 states. [2018-09-30 20:30:48,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:48,721 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2018-09-30 20:30:48,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:30:48,722 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-30 20:30:48,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:48,722 INFO L225 Difference]: With dead ends: 153 [2018-09-30 20:30:48,723 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 20:30:48,723 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 [2018-09-30 20:30:48,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 20:30:48,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 20:30:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:30:48,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-30 20:30:48,731 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 100 [2018-09-30 20:30:48,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:48,731 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-30 20:30:48,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:30:48,731 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-30 20:30:48,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 20:30:48,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:48,732 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-09-30 20:30:48,732 INFO L423 AbstractCegarLoop]: === Iteration 144 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:48,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:48,732 INFO L82 PathProgramCache]: Analyzing trace with hash -220677689, now seen corresponding path program 141 times [2018-09-30 20:30:48,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:48,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:48,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:48,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:48,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:49,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:49,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:30:49,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:30:49,747 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-09-30 20:30:49,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:49,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:49,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:49,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 20:30:49,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:30:49,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:30:49,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:30:49,788 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 51 states. [2018-09-30 20:30:49,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:49,948 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-30 20:30:49,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:30:49,948 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-30 20:30:49,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:49,949 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:30:49,949 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 20:30:49,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:30:49,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 20:30:49,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 20:30:49,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 20:30:49,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-09-30 20:30:49,956 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2018-09-30 20:30:49,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:49,956 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-09-30 20:30:49,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:30:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-09-30 20:30:49,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 20:30:49,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:49,957 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1] [2018-09-30 20:30:49,957 INFO L423 AbstractCegarLoop]: === Iteration 145 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:49,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:49,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1748864711, now seen corresponding path program 142 times [2018-09-30 20:30:49,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:49,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:49,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:49,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:49,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:51,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:51,174 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 [2018-09-30 20:30:51,181 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:30:51,240 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:30:51,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:51,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:51,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:51,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 20:30:51,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:30:51,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:30:51,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:30:51,287 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 51 states. [2018-09-30 20:30:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:54,140 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2018-09-30 20:30:54,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:30:54,140 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 101 [2018-09-30 20:30:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:54,141 INFO L225 Difference]: With dead ends: 155 [2018-09-30 20:30:54,141 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 20:30:54,141 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 [2018-09-30 20:30:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 20:30:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2018-09-30 20:30:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 20:30:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-09-30 20:30:54,148 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-09-30 20:30:54,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:54,148 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-09-30 20:30:54,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:30:54,148 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-09-30 20:30:54,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 20:30:54,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:54,149 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-09-30 20:30:54,149 INFO L423 AbstractCegarLoop]: === Iteration 146 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:54,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:54,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1619830329, now seen corresponding path program 143 times [2018-09-30 20:30:54,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:54,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:54,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:54,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:54,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:55,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:55,059 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 [2018-09-30 20:30:55,067 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:30:55,162 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-09-30 20:30:55,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:55,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:55,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:55,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 20:30:55,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:30:55,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:30:55,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:30:55,204 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 52 states. [2018-09-30 20:30:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:55,930 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-09-30 20:30:55,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:30:55,930 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-30 20:30:55,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:55,931 INFO L225 Difference]: With dead ends: 156 [2018-09-30 20:30:55,931 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 20:30:55,932 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 [2018-09-30 20:30:55,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 20:30:55,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 20:30:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 20:30:55,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-30 20:30:55,938 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 102 [2018-09-30 20:30:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:55,938 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-30 20:30:55,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:30:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-30 20:30:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 20:30:55,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:55,939 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-09-30 20:30:55,939 INFO L423 AbstractCegarLoop]: === Iteration 147 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:55,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:55,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1198720877, now seen corresponding path program 144 times [2018-09-30 20:30:55,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:55,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:55,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:55,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:55,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:56,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:56,897 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 [2018-09-30 20:30:56,903 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:30:56,977 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-30 20:30:56,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:56,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:57,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:57,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 20:30:57,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:30:57,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:30:57,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:30:57,018 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-09-30 20:30:57,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:57,173 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2018-09-30 20:30:57,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:30:57,173 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-30 20:30:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:57,174 INFO L225 Difference]: With dead ends: 107 [2018-09-30 20:30:57,174 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 20:30:57,174 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 [2018-09-30 20:30:57,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 20:30:57,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 20:30:57,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 20:30:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-09-30 20:30:57,181 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 102 [2018-09-30 20:30:57,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:57,181 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-09-30 20:30:57,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:30:57,181 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-09-30 20:30:57,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 20:30:57,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:57,182 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1] [2018-09-30 20:30:57,182 INFO L423 AbstractCegarLoop]: === Iteration 148 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:57,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:57,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1494419999, now seen corresponding path program 145 times [2018-09-30 20:30:57,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:57,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:57,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:57,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:57,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:58,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:58,448 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 [2018-09-30 20:30:58,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:30:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:58,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:58,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:58,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 20:30:58,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:30:58,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:30:58,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:30:58,566 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 52 states. [2018-09-30 20:31:01,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:01,543 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-09-30 20:31:01,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:31:01,544 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 103 [2018-09-30 20:31:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:01,544 INFO L225 Difference]: With dead ends: 158 [2018-09-30 20:31:01,544 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 20:31:01,545 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 [2018-09-30 20:31:01,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 20:31:01,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 106. [2018-09-30 20:31:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 20:31:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-30 20:31:01,551 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2018-09-30 20:31:01,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:01,551 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-30 20:31:01,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:31:01,551 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-30 20:31:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 20:31:01,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:01,551 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-09-30 20:31:01,552 INFO L423 AbstractCegarLoop]: === Iteration 149 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:01,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:01,552 INFO L82 PathProgramCache]: Analyzing trace with hash 917558765, now seen corresponding path program 146 times [2018-09-30 20:31:01,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:01,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:01,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:01,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:31:01,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:02,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:02,490 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 [2018-09-30 20:31:02,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:31:02,557 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:31:02,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:02,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:02,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:02,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 20:31:02,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:31:02,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:31:02,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:31:02,598 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 53 states. [2018-09-30 20:31:03,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:03,064 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2018-09-30 20:31:03,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:31:03,064 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-30 20:31:03,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:03,065 INFO L225 Difference]: With dead ends: 159 [2018-09-30 20:31:03,065 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 20:31:03,066 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 [2018-09-30 20:31:03,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 20:31:03,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 20:31:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 20:31:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-30 20:31:03,072 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 104 [2018-09-30 20:31:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:03,072 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-30 20:31:03,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:31:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-30 20:31:03,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 20:31:03,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:03,073 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-09-30 20:31:03,073 INFO L423 AbstractCegarLoop]: === Iteration 150 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:03,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:03,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1901667065, now seen corresponding path program 147 times [2018-09-30 20:31:03,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:03,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:03,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:03,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:03,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:04,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:04,077 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 [2018-09-30 20:31:04,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:31:04,165 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-09-30 20:31:04,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:04,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:04,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:04,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 20:31:04,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:31:04,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:31:04,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:31:04,208 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 53 states. [2018-09-30 20:31:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:04,356 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-30 20:31:04,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:31:04,356 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-30 20:31:04,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:04,357 INFO L225 Difference]: With dead ends: 109 [2018-09-30 20:31:04,357 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 20:31:04,357 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 [2018-09-30 20:31:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 20:31:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 20:31:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 20:31:04,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-09-30 20:31:04,364 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2018-09-30 20:31:04,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:04,364 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-09-30 20:31:04,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:31:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-09-30 20:31:04,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 20:31:04,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:04,365 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1] [2018-09-30 20:31:04,365 INFO L423 AbstractCegarLoop]: === Iteration 151 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:04,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:04,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1177801607, now seen corresponding path program 148 times [2018-09-30 20:31:04,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:04,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:04,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:04,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:04,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:05,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:05,710 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 [2018-09-30 20:31:05,717 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:31:05,779 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:31:05,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:05,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:05,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:05,828 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 20:31:05,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:31:05,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:31:05,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:31:05,829 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 53 states. [2018-09-30 20:31:08,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:08,955 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-09-30 20:31:08,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:31:08,956 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 105 [2018-09-30 20:31:08,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:08,956 INFO L225 Difference]: With dead ends: 161 [2018-09-30 20:31:08,956 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 20:31:08,957 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 [2018-09-30 20:31:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 20:31:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2018-09-30 20:31:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 20:31:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-09-30 20:31:08,964 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2018-09-30 20:31:08,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:08,964 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-09-30 20:31:08,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:31:08,964 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-09-30 20:31:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 20:31:08,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:08,964 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-09-30 20:31:08,964 INFO L423 AbstractCegarLoop]: === Iteration 152 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:08,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:08,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2142917369, now seen corresponding path program 149 times [2018-09-30 20:31:08,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:08,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:08,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:08,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:08,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:09,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:09,919 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 [2018-09-30 20:31:09,926 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:31:10,019 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2018-09-30 20:31:10,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:10,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:10,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:10,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 20:31:10,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:31:10,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:31:10,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:31:10,062 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 54 states. [2018-09-30 20:31:10,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:10,901 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2018-09-30 20:31:10,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:31:10,901 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-30 20:31:10,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:10,902 INFO L225 Difference]: With dead ends: 162 [2018-09-30 20:31:10,902 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 20:31:10,902 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 [2018-09-30 20:31:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 20:31:10,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 20:31:10,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 20:31:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-30 20:31:10,911 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 106 [2018-09-30 20:31:10,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:10,911 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-30 20:31:10,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:31:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-30 20:31:10,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 20:31:10,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:10,912 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-09-30 20:31:10,912 INFO L423 AbstractCegarLoop]: === Iteration 153 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:10,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:10,912 INFO L82 PathProgramCache]: Analyzing trace with hash 655395117, now seen corresponding path program 150 times [2018-09-30 20:31:10,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:10,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:10,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:10,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:10,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:11,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:11,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:31:11,943 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:31:12,016 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-09-30 20:31:12,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:12,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:12,057 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:12,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 20:31:12,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:31:12,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:31:12,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:31:12,058 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-09-30 20:31:12,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:12,214 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2018-09-30 20:31:12,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:31:12,214 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-30 20:31:12,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:12,215 INFO L225 Difference]: With dead ends: 111 [2018-09-30 20:31:12,215 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 20:31:12,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:31:12,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 20:31:12,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 20:31:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 20:31:12,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-09-30 20:31:12,222 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 106 [2018-09-30 20:31:12,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:12,222 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-09-30 20:31:12,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:31:12,222 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-09-30 20:31:12,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 20:31:12,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:12,223 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1] [2018-09-30 20:31:12,223 INFO L423 AbstractCegarLoop]: === Iteration 154 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:12,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:12,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1157649375, now seen corresponding path program 151 times [2018-09-30 20:31:12,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:12,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:12,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:12,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:12,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:13,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:13,615 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 [2018-09-30 20:31:13,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:31:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:13,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:13,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:13,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 20:31:13,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:31:13,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:31:13,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:31:13,737 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 54 states. [2018-09-30 20:31:16,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:16,957 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-30 20:31:16,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:31:16,957 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 107 [2018-09-30 20:31:16,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:16,958 INFO L225 Difference]: With dead ends: 164 [2018-09-30 20:31:16,958 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 20:31:16,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:31:16,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 20:31:16,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2018-09-30 20:31:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 20:31:16,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-30 20:31:16,965 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-09-30 20:31:16,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:16,965 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-30 20:31:16,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:31:16,965 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-30 20:31:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 20:31:16,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:16,966 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-09-30 20:31:16,966 INFO L423 AbstractCegarLoop]: === Iteration 155 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:16,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:16,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1527453779, now seen corresponding path program 152 times [2018-09-30 20:31:16,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:16,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:16,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:16,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:31:16,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:17,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:17,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:31:17,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:31:18,025 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:31:18,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:18,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:18,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:18,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 20:31:18,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:31:18,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:31:18,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:31:18,073 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 55 states. [2018-09-30 20:31:18,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:18,705 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2018-09-30 20:31:18,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:31:18,706 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-30 20:31:18,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:18,706 INFO L225 Difference]: With dead ends: 165 [2018-09-30 20:31:18,706 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 20:31:18,707 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 [2018-09-30 20:31:18,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 20:31:18,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 20:31:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 20:31:18,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-30 20:31:18,714 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 108 [2018-09-30 20:31:18,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:18,714 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-30 20:31:18,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:31:18,714 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-30 20:31:18,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 20:31:18,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:18,715 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-09-30 20:31:18,715 INFO L423 AbstractCegarLoop]: === Iteration 156 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:18,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:18,715 INFO L82 PathProgramCache]: Analyzing trace with hash -679112633, now seen corresponding path program 153 times [2018-09-30 20:31:18,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:18,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:18,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:18,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:18,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:19,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:19,772 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 [2018-09-30 20:31:19,779 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:31:19,861 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 20:31:19,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:19,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:19,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:19,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 20:31:19,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:31:19,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:31:19,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:31:19,906 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 55 states. [2018-09-30 20:31:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:20,090 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-30 20:31:20,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:31:20,090 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-30 20:31:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:20,091 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:31:20,091 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 20:31:20,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:31:20,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 20:31:20,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 20:31:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 20:31:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-09-30 20:31:20,098 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2018-09-30 20:31:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:20,098 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-09-30 20:31:20,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:31:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-09-30 20:31:20,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 20:31:20,099 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:20,099 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1] [2018-09-30 20:31:20,099 INFO L423 AbstractCegarLoop]: === Iteration 157 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:20,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:20,099 INFO L82 PathProgramCache]: Analyzing trace with hash 422283335, now seen corresponding path program 154 times [2018-09-30 20:31:20,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:20,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:20,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:20,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:20,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:21,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:21,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:31:21,498 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:31:21,563 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:31:21,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:21,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:21,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:21,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 20:31:21,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:31:21,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:31:21,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:31:21,612 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 55 states. [2018-09-30 20:31:24,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:24,958 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2018-09-30 20:31:24,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:31:24,958 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 109 [2018-09-30 20:31:24,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:24,959 INFO L225 Difference]: With dead ends: 167 [2018-09-30 20:31:24,959 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 20:31:24,960 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 [2018-09-30 20:31:24,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 20:31:24,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2018-09-30 20:31:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 20:31:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-09-30 20:31:24,966 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2018-09-30 20:31:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:24,966 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-09-30 20:31:24,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:31:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-09-30 20:31:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 20:31:24,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:24,967 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-09-30 20:31:24,967 INFO L423 AbstractCegarLoop]: === Iteration 158 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:24,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:24,967 INFO L82 PathProgramCache]: Analyzing trace with hash 205819975, now seen corresponding path program 155 times [2018-09-30 20:31:24,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:24,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:24,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:24,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:24,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:25,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:25,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:31:25,997 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:31:26,087 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 20:31:26,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:26,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:26,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:26,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 20:31:26,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:31:26,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:31:26,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:31:26,141 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2018-09-30 20:31:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:26,993 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-09-30 20:31:26,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:31:26,993 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-30 20:31:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:26,994 INFO L225 Difference]: With dead ends: 168 [2018-09-30 20:31:26,994 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 20:31:26,995 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 [2018-09-30 20:31:26,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 20:31:27,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 20:31:27,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 20:31:27,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-30 20:31:27,001 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 110 [2018-09-30 20:31:27,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:27,002 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-30 20:31:27,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:31:27,002 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-30 20:31:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 20:31:27,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:27,002 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-09-30 20:31:27,002 INFO L423 AbstractCegarLoop]: === Iteration 159 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:27,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:27,003 INFO L82 PathProgramCache]: Analyzing trace with hash 734591725, now seen corresponding path program 156 times [2018-09-30 20:31:27,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:27,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:27,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:27,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:27,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:28,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:28,734 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 [2018-09-30 20:31:28,741 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:31:28,819 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 20:31:28,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:28,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:28,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:28,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 20:31:28,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:31:28,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:31:28,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:31:28,862 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-09-30 20:31:29,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:29,038 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-09-30 20:31:29,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:31:29,039 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-30 20:31:29,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:29,039 INFO L225 Difference]: With dead ends: 115 [2018-09-30 20:31:29,040 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 20:31:29,040 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 [2018-09-30 20:31:29,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 20:31:29,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 20:31:29,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 20:31:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-09-30 20:31:29,047 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 110 [2018-09-30 20:31:29,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:29,047 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-09-30 20:31:29,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:31:29,047 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-09-30 20:31:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 20:31:29,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:29,047 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1] [2018-09-30 20:31:29,048 INFO L423 AbstractCegarLoop]: === Iteration 160 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:29,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:29,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1297445473, now seen corresponding path program 157 times [2018-09-30 20:31:29,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:29,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:29,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:29,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:29,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:30,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:30,478 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 [2018-09-30 20:31:30,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:31:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:30,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:30,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:30,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 20:31:30,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:31:30,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:31:30,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:31:30,607 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 56 states. [2018-09-30 20:31:34,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:34,063 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-09-30 20:31:34,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:31:34,063 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 111 [2018-09-30 20:31:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:34,064 INFO L225 Difference]: With dead ends: 170 [2018-09-30 20:31:34,064 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 20:31:34,064 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 [2018-09-30 20:31:34,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 20:31:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2018-09-30 20:31:34,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 20:31:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2018-09-30 20:31:34,073 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2018-09-30 20:31:34,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:34,073 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2018-09-30 20:31:34,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:31:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2018-09-30 20:31:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 20:31:34,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:34,074 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-09-30 20:31:34,074 INFO L423 AbstractCegarLoop]: === Iteration 161 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:34,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:34,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1566042477, now seen corresponding path program 158 times [2018-09-30 20:31:34,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:34,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:34,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:34,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:31:34,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:35,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:35,140 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 [2018-09-30 20:31:35,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:31:35,210 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:31:35,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:35,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:35,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:35,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 20:31:35,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 20:31:35,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 20:31:35,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 20:31:35,254 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2018-09-30 20:31:35,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:35,771 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-09-30 20:31:35,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:31:35,771 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-30 20:31:35,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:35,772 INFO L225 Difference]: With dead ends: 171 [2018-09-30 20:31:35,772 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 20:31:35,772 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 [2018-09-30 20:31:35,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 20:31:35,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 20:31:35,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 20:31:35,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-30 20:31:35,779 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 112 [2018-09-30 20:31:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:35,779 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-30 20:31:35,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 20:31:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-30 20:31:35,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 20:31:35,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:35,780 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-09-30 20:31:35,780 INFO L423 AbstractCegarLoop]: === Iteration 162 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:35,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:35,780 INFO L82 PathProgramCache]: Analyzing trace with hash 778097543, now seen corresponding path program 159 times [2018-09-30 20:31:35,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:35,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:35,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:35,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:35,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:36,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:36,942 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 [2018-09-30 20:31:36,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:31:37,037 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 20:31:37,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:37,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:37,079 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:37,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 20:31:37,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 20:31:37,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 20:31:37,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 20:31:37,080 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 57 states. [2018-09-30 20:31:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:37,247 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-30 20:31:37,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:31:37,248 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-30 20:31:37,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:37,248 INFO L225 Difference]: With dead ends: 117 [2018-09-30 20:31:37,248 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 20:31:37,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 20:31:37,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 20:31:37,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 20:31:37,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 20:31:37,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-09-30 20:31:37,258 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2018-09-30 20:31:37,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:37,258 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-09-30 20:31:37,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 20:31:37,258 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-09-30 20:31:37,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 20:31:37,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:37,259 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1] [2018-09-30 20:31:37,259 INFO L423 AbstractCegarLoop]: === Iteration 163 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:37,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:37,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1648841465, now seen corresponding path program 160 times [2018-09-30 20:31:37,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:37,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:37,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:37,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:37,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:38,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:38,755 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 [2018-09-30 20:31:38,762 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:31:38,830 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:31:38,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:38,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:38,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:38,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 20:31:38,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 20:31:38,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 20:31:38,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 20:31:38,881 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 57 states. [2018-09-30 20:31:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:42,494 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-09-30 20:31:42,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:31:42,494 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 113 [2018-09-30 20:31:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:42,495 INFO L225 Difference]: With dead ends: 173 [2018-09-30 20:31:42,495 INFO L226 Difference]: Without dead ends: 170 [2018-09-30 20:31:42,495 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 [2018-09-30 20:31:42,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-30 20:31:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2018-09-30 20:31:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 20:31:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-09-30 20:31:42,505 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2018-09-30 20:31:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:42,505 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-09-30 20:31:42,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 20:31:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-09-30 20:31:42,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 20:31:42,506 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:42,506 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-09-30 20:31:42,506 INFO L423 AbstractCegarLoop]: === Iteration 164 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:42,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:42,506 INFO L82 PathProgramCache]: Analyzing trace with hash 425460615, now seen corresponding path program 161 times [2018-09-30 20:31:42,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:42,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:42,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:42,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:42,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:43,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:43,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:31:43,612 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:31:43,706 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2018-09-30 20:31:43,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:43,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:43,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:43,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 20:31:43,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:31:43,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:31:43,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:31:43,758 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 58 states. [2018-09-30 20:31:44,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:44,118 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2018-09-30 20:31:44,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:31:44,118 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-30 20:31:44,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:44,119 INFO L225 Difference]: With dead ends: 174 [2018-09-30 20:31:44,119 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 20:31:44,119 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 [2018-09-30 20:31:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 20:31:44,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 20:31:44,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 20:31:44,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-30 20:31:44,127 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 114 [2018-09-30 20:31:44,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:44,127 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-30 20:31:44,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:31:44,127 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-30 20:31:44,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 20:31:44,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:44,128 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-09-30 20:31:44,128 INFO L423 AbstractCegarLoop]: === Iteration 165 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:44,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:44,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1768971437, now seen corresponding path program 162 times [2018-09-30 20:31:44,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:44,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:44,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:44,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:44,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:45,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:45,292 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 [2018-09-30 20:31:45,299 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:31:45,384 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-09-30 20:31:45,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:45,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:45,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:45,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 20:31:45,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:31:45,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:31:45,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:31:45,428 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-09-30 20:31:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:45,619 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2018-09-30 20:31:45,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:31:45,620 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-30 20:31:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:45,620 INFO L225 Difference]: With dead ends: 119 [2018-09-30 20:31:45,620 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 20:31:45,621 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 [2018-09-30 20:31:45,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 20:31:45,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 20:31:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 20:31:45,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-09-30 20:31:45,627 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 114 [2018-09-30 20:31:45,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:45,627 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-09-30 20:31:45,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:31:45,628 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-09-30 20:31:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 20:31:45,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:45,628 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1] [2018-09-30 20:31:45,628 INFO L423 AbstractCegarLoop]: === Iteration 166 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:45,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:45,628 INFO L82 PathProgramCache]: Analyzing trace with hash -996521823, now seen corresponding path program 163 times [2018-09-30 20:31:45,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:45,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:45,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:45,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:45,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:47,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:47,150 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 [2018-09-30 20:31:47,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:31:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:47,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:47,285 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:47,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 20:31:47,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:31:47,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:31:47,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:31:47,286 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 58 states. [2018-09-30 20:31:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:51,009 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-09-30 20:31:51,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:31:51,009 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 115 [2018-09-30 20:31:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:51,010 INFO L225 Difference]: With dead ends: 176 [2018-09-30 20:31:51,010 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 20:31:51,010 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 [2018-09-30 20:31:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 20:31:51,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2018-09-30 20:31:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 20:31:51,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-09-30 20:31:51,018 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2018-09-30 20:31:51,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:51,018 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-09-30 20:31:51,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:31:51,018 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-09-30 20:31:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 20:31:51,018 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:51,018 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-09-30 20:31:51,018 INFO L423 AbstractCegarLoop]: === Iteration 167 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:51,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:51,019 INFO L82 PathProgramCache]: Analyzing trace with hash -827466963, now seen corresponding path program 164 times [2018-09-30 20:31:51,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:51,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:51,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:51,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:31:51,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:52,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:52,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:31:52,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:31:52,221 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:31:52,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:52,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:52,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:52,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 20:31:52,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:31:52,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:31:52,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:31:52,276 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 59 states. [2018-09-30 20:31:52,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:52,830 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2018-09-30 20:31:52,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:31:52,830 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-30 20:31:52,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:52,831 INFO L225 Difference]: With dead ends: 177 [2018-09-30 20:31:52,831 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 20:31:52,831 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 [2018-09-30 20:31:52,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 20:31:52,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 20:31:52,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 20:31:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-30 20:31:52,842 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 116 [2018-09-30 20:31:52,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:52,842 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-30 20:31:52,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:31:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-30 20:31:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 20:31:52,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:52,843 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-09-30 20:31:52,843 INFO L423 AbstractCegarLoop]: === Iteration 168 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:52,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:52,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2128304441, now seen corresponding path program 165 times [2018-09-30 20:31:52,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:52,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:52,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:52,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:52,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:54,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:54,067 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 [2018-09-30 20:31:54,076 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:31:54,165 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-30 20:31:54,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:54,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:54,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:54,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 20:31:54,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:31:54,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:31:54,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:31:54,211 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 59 states. [2018-09-30 20:31:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:54,400 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-30 20:31:54,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:31:54,400 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-30 20:31:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:54,401 INFO L225 Difference]: With dead ends: 121 [2018-09-30 20:31:54,401 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 20:31:54,401 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 [2018-09-30 20:31:54,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 20:31:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 20:31:54,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 20:31:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-09-30 20:31:54,409 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2018-09-30 20:31:54,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:54,409 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-09-30 20:31:54,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:31:54,409 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-09-30 20:31:54,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 20:31:54,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:54,410 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1] [2018-09-30 20:31:54,410 INFO L423 AbstractCegarLoop]: === Iteration 169 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:54,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:54,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1552989753, now seen corresponding path program 166 times [2018-09-30 20:31:54,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:54,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:54,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:54,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:54,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:55,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:55,982 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 [2018-09-30 20:31:55,989 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:31:56,058 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:31:56,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:56,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:56,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:56,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 20:31:56,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:31:56,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:31:56,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:31:56,110 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 59 states. [2018-09-30 20:31:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:59,967 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2018-09-30 20:31:59,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:31:59,968 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 117 [2018-09-30 20:31:59,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:59,969 INFO L225 Difference]: With dead ends: 179 [2018-09-30 20:31:59,969 INFO L226 Difference]: Without dead ends: 176 [2018-09-30 20:31:59,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:31:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-30 20:31:59,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 120. [2018-09-30 20:31:59,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 20:31:59,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-09-30 20:31:59,976 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 117 [2018-09-30 20:31:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:59,976 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-09-30 20:31:59,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:31:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-09-30 20:31:59,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 20:31:59,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:59,977 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-09-30 20:31:59,977 INFO L423 AbstractCegarLoop]: === Iteration 170 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:59,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:59,977 INFO L82 PathProgramCache]: Analyzing trace with hash -898103609, now seen corresponding path program 167 times [2018-09-30 20:31:59,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:59,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:59,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:59,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:59,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:32:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:32:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:32:01,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:32:01,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:32:01,162 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:32:01,262 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 20:32:01,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:32:01,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:32:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:32:01,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:32:01,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 20:32:01,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:32:01,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:32:01,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:32:01,326 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 60 states. [2018-09-30 20:32:01,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:32:01,833 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-09-30 20:32:01,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:32:01,834 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-30 20:32:01,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:32:01,834 INFO L225 Difference]: With dead ends: 180 [2018-09-30 20:32:01,835 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 20:32:01,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:32:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 20:32:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 20:32:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 20:32:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-30 20:32:01,842 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 118 [2018-09-30 20:32:01,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:32:01,843 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-30 20:32:01,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:32:01,843 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-30 20:32:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 20:32:01,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:32:01,843 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-09-30 20:32:01,843 INFO L423 AbstractCegarLoop]: === Iteration 171 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:32:01,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:32:01,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1725607533, now seen corresponding path program 168 times [2018-09-30 20:32:01,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:32:01,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:32:01,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:32:01,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:32:01,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:32:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:32:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:32:03,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:32:03,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:32:03,112 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:32:03,203 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-30 20:32:03,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:32:03,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:32:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:32:03,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:32:03,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 20:32:03,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:32:03,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:32:03,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:32:03,248 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2018-09-30 20:32:03,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:32:03,444 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2018-09-30 20:32:03,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:32:03,444 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-30 20:32:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:32:03,445 INFO L225 Difference]: With dead ends: 123 [2018-09-30 20:32:03,445 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 20:32:03,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:32:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 20:32:03,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 20:32:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 20:32:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-09-30 20:32:03,453 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 118 [2018-09-30 20:32:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:32:03,454 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-09-30 20:32:03,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:32:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-09-30 20:32:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 20:32:03,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:32:03,454 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1] [2018-09-30 20:32:03,454 INFO L423 AbstractCegarLoop]: === Iteration 172 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:32:03,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:32:03,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1954164449, now seen corresponding path program 169 times [2018-09-30 20:32:03,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:32:03,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:32:03,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:32:03,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:32:03,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:32:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:32:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:32:05,114 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:32:05,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:32:05,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:32:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:32:05,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:32:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:32:05,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:32:05,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 20:32:05,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:32:05,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:32:05,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:32:05,259 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 60 states. Received shutdown request... [2018-09-30 20:32:07,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:32:07,869 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:32:07,875 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:32:07,875 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:32:07 BoogieIcfgContainer [2018-09-30 20:32:07,875 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:32:07,876 INFO L168 Benchmark]: Toolchain (without parser) took 236886.49 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -207.1 MB). Free memory was 1.4 GB in the beginning and 888.0 MB in the end (delta: 560.3 MB). Peak memory consumption was 353.2 MB. Max. memory is 7.1 GB. [2018-09-30 20:32:07,877 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:32:07,877 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.99 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:32:07,878 INFO L168 Benchmark]: Boogie Preprocessor took 22.47 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:32:07,878 INFO L168 Benchmark]: RCFGBuilder took 259.75 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:32:07,878 INFO L168 Benchmark]: TraceAbstraction took 236556.34 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -207.1 MB). Free memory was 1.4 GB in the beginning and 888.0 MB in the end (delta: 539.2 MB). Peak memory consumption was 332.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:32:07,880 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.99 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.47 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 259.75 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 236556.34 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -207.1 MB). Free memory was 1.4 GB in the beginning and 888.0 MB in the end (delta: 539.2 MB). Peak memory consumption was 332.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 23). Cancelled while BasicCegarLoop was constructing difference of abstraction (120states) and FLOYD_HOARE automaton (currently 60 states, 60 states before enhancement), while ReachableStatesComputation was computing reachable states (97 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was constructing difference of abstraction (120states) and FLOYD_HOARE automaton (currently 60 states, 60 states before enhancement), while ReachableStatesComputation was computing reachable states (97 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. TIMEOUT Result, 236.4s OverallTime, 172 OverallIterations, 57 TraceHistogramMax, 110.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 689 SDtfs, 1599 SDslu, 6337 SDs, 0 SdLazy, 166517 SolverSat, 2002 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 89.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20566 GetRequests, 15322 SyntacticMatches, 114 SemanticMatches, 5130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3192 ImplicationChecksByTransitivity, 102.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=169, 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, 171 MinimizatonAttempts, 1596 StatesRemovedByMinimization, 56 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 8.8s SatisfiabilityAnalysisTime, 108.6s InterpolantComputationTime, 21309 NumberOfCodeBlocks, 21309 NumberOfCodeBlocksAsserted, 1643 NumberOfCheckSat, 20968 ConstructedInterpolants, 0 QuantifiedInterpolants, 7178084 SizeOfPredicates, 112 NumberOfNonLiveVariables, 46137 ConjunctsInSsa, 13503 ConjunctsInUnsatCore, 341 InterpolantComputations, 3 PerfectInterpolantSequences, 130033/383493 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-0-2018-09-30_20-32-07-889.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-32-07-889.csv Completed graceful shutdown