java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:29:20,829 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:29:20,831 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:29:20,843 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:29:20,844 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:29:20,845 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:29:20,846 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:29:20,848 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:29:20,850 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:29:20,851 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:29:20,852 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:29:20,886 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 [2018-09-26 21:29:20,915 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:29:20,915 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:29:20,917 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:29:20,917 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:29:20,918 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:29:20,918 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:29:20,918 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:29:20,918 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:29:20,919 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:29:20,919 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:29:20,919 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:29:20,919 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:29:20,921 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:29:20,921 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:29:20,921 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:29:20,921 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:29:20,921 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:29:20,922 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:29:20,922 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:29:20,922 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:29:20,922 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:29:20,924 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:29:20,924 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:29:20,924 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:29:20,924 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:29:20,924 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:29:20,925 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:29:20,925 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:29:20,925 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:29:20,925 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:29:20,990 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:29:21,003 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:29:21,008 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:29:21,010 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:29:21,011 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:29:21,012 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl [2018-09-26 21:29:21,012 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl' [2018-09-26 21:29:21,066 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:29:21,070 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:29:21,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:29:21,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:29:21,071 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:29:21,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:21" (1/1) ... [2018-09-26 21:29:21,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:21" (1/1) ... [2018-09-26 21:29:21,110 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-26 21:29:21,111 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-26 21:29:21,111 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-26 21:29:21,113 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:29:21,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:29:21,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:29:21,114 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:29:21,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:21" (1/1) ... [2018-09-26 21:29:21,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:21" (1/1) ... [2018-09-26 21:29:21,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:21" (1/1) ... [2018-09-26 21:29:21,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:21" (1/1) ... [2018-09-26 21:29:21,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:21" (1/1) ... [2018-09-26 21:29:21,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:21" (1/1) ... [2018-09-26 21:29:21,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:21" (1/1) ... [2018-09-26 21:29:21,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:29:21,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:29:21,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:29:21,137 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:29:21,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:21" (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 [2018-09-26 21:29:21,213 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-26 21:29:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-26 21:29:21,213 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-26 21:29:21,381 INFO L343 CfgBuilder]: Using library mode [2018-09-26 21:29:21,382 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:29:21 BoogieIcfgContainer [2018-09-26 21:29:21,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:29:21,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:29:21,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:29:21,386 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:29:21,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:21" (1/2) ... [2018-09-26 21:29:21,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d536d74 and model type HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:29:21, skipping insertion in model container [2018-09-26 21:29:21,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:29:21" (2/2) ... [2018-09-26 21:29:21,390 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEqualityWithBranches.bpl [2018-09-26 21:29:21,400 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:29:21,407 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:29:21,465 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:29:21,466 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:29:21,466 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:29:21,467 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:29:21,467 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:29:21,467 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:29:21,467 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:29:21,467 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:29:21,467 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:29:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-26 21:29:21,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-26 21:29:21,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:21,490 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-26 21:29:21,491 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:21,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:21,498 INFO L82 PathProgramCache]: Analyzing trace with hash 979, now seen corresponding path program 1 times [2018-09-26 21:29:21,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:21,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:21,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:21,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:21,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:21,651 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:29:21,651 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-26 21:29:21,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:29:21,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:29:21,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:29:21,670 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-26 21:29:21,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:21,762 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-26 21:29:21,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:29:21,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-26 21:29:21,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:21,783 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:29:21,783 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:29:21,787 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 [2018-09-26 21:29:21,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:29:21,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:29:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:29:21,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-09-26 21:29:21,853 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 9 transitions. Word has length 2 [2018-09-26 21:29:21,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:21,853 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 9 transitions. [2018-09-26 21:29:21,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:29:21,854 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 9 transitions. [2018-09-26 21:29:21,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:29:21,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:21,854 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-26 21:29:21,855 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:21,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:21,855 INFO L82 PathProgramCache]: Analyzing trace with hash 28757385, now seen corresponding path program 1 times [2018-09-26 21:29:21,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:21,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:21,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:21,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:21,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:21,882 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:29:21,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:29:21,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:29:21,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:29:21,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:29:21,885 INFO L87 Difference]: Start difference. First operand 7 states and 9 transitions. Second operand 3 states. [2018-09-26 21:29:21,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:21,908 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2018-09-26 21:29:21,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:29:21,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-26 21:29:21,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:21,909 INFO L225 Difference]: With dead ends: 12 [2018-09-26 21:29:21,909 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 21:29:21,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:29:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 21:29:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-26 21:29:21,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:29:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-26 21:29:21,914 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-26 21:29:21,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:21,915 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-26 21:29:21,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:29:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-26 21:29:21,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:29:21,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:21,915 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-26 21:29:21,916 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:21,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:21,916 INFO L82 PathProgramCache]: Analyzing trace with hash 28757447, now seen corresponding path program 1 times [2018-09-26 21:29:21,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:21,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:21,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:21,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:21,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:22,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:22,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:22,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:22,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:22,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:22,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-26 21:29:22,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:29:22,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:29:22,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:29:22,066 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-09-26 21:29:22,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:22,105 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2018-09-26 21:29:22,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:29:22,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-26 21:29:22,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:22,106 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:29:22,107 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:29:22,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:29:22,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:29:22,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-26 21:29:22,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:29:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-26 21:29:22,110 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 5 [2018-09-26 21:29:22,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:22,111 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-26 21:29:22,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:29:22,111 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-26 21:29:22,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:29:22,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:22,112 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2018-09-26 21:29:22,112 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:22,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:22,113 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203669, now seen corresponding path program 1 times [2018-09-26 21:29:22,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:22,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:22,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:22,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:22,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:22,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:22,165 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 [2018-09-26 21:29:22,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:22,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:22,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:22,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:29:22,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:29:22,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:29:22,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:29:22,222 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-09-26 21:29:22,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:22,259 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2018-09-26 21:29:22,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:29:22,259 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-26 21:29:22,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:22,260 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:29:22,260 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:29:22,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:29:22,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:29:22,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:29:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:29:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-09-26 21:29:22,264 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2018-09-26 21:29:22,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:22,265 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-09-26 21:29:22,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:29:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-09-26 21:29:22,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:29:22,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:22,265 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1] [2018-09-26 21:29:22,266 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:22,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:22,266 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203731, now seen corresponding path program 2 times [2018-09-26 21:29:22,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:22,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:22,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:22,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:22,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:22,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:22,366 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 [2018-09-26 21:29:22,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:22,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:22,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:22,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:22,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:22,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:29:22,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:29:22,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:29:22,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:29:22,425 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states. [2018-09-26 21:29:22,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:22,487 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-26 21:29:22,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:29:22,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-26 21:29:22,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:22,489 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:29:22,489 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:29:22,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:29:22,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:29:22,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:29:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:29:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-09-26 21:29:22,493 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-09-26 21:29:22,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:22,494 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-09-26 21:29:22,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:29:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-09-26 21:29:22,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:29:22,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:22,495 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1] [2018-09-26 21:29:22,495 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:22,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:22,496 INFO L82 PathProgramCache]: Analyzing trace with hash 154849801, now seen corresponding path program 2 times [2018-09-26 21:29:22,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:22,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:22,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:22,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:22,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:22,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:22,595 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 [2018-09-26 21:29:22,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:22,655 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:22,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:22,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:22,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:22,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:29:22,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:29:22,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:29:22,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:29:22,698 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2018-09-26 21:29:22,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:22,783 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2018-09-26 21:29:22,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:29:22,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-09-26 21:29:22,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:22,784 INFO L225 Difference]: With dead ends: 18 [2018-09-26 21:29:22,784 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:29:22,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:29:22,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:29:22,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-26 21:29:22,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:29:22,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-26 21:29:22,788 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-09-26 21:29:22,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:22,788 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-26 21:29:22,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:29:22,789 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-26 21:29:22,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:29:22,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:22,789 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1] [2018-09-26 21:29:22,790 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:22,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:22,790 INFO L82 PathProgramCache]: Analyzing trace with hash 154849863, now seen corresponding path program 3 times [2018-09-26 21:29:22,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:22,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:22,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:22,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:22,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:22,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:22,944 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 [2018-09-26 21:29:22,963 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:22,990 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:29:22,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:22,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:23,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:23,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:29:23,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:29:23,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:29:23,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:29:23,031 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-09-26 21:29:23,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:23,079 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-09-26 21:29:23,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:29:23,080 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-09-26 21:29:23,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:23,081 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:29:23,082 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:29:23,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:29:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:29:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-26 21:29:23,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:29:23,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-26 21:29:23,088 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2018-09-26 21:29:23,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:23,089 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-26 21:29:23,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:29:23,089 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-26 21:29:23,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:29:23,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:23,090 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1] [2018-09-26 21:29:23,090 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:23,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:23,091 INFO L82 PathProgramCache]: Analyzing trace with hash 336984725, now seen corresponding path program 3 times [2018-09-26 21:29:23,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:23,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:23,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:23,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:23,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:23,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:23,162 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 [2018-09-26 21:29:23,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:23,185 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-26 21:29:23,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:23,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:23,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:23,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-26 21:29:23,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:29:23,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:29:23,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:29:23,382 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 11 states. [2018-09-26 21:29:23,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:23,906 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-09-26 21:29:23,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:29:23,907 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-26 21:29:23,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:23,907 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:29:23,907 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:29:23,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:29:23,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:29:23,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:29:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:29:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-09-26 21:29:23,912 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-09-26 21:29:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:23,912 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-09-26 21:29:23,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:29:23,913 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-09-26 21:29:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:29:23,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:23,914 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2018-09-26 21:29:23,914 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:23,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:23,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810761, now seen corresponding path program 4 times [2018-09-26 21:29:23,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:23,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:23,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:23,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:23,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:24,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:24,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:24,019 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:24,027 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:24,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:24,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:24,057 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:24,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:29:24,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:29:24,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:29:24,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:29:24,058 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2018-09-26 21:29:24,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:24,082 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-09-26 21:29:24,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:29:24,082 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-09-26 21:29:24,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:24,083 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:29:24,083 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:29:24,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:29:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:29:24,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-26 21:29:24,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:29:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-26 21:29:24,089 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-09-26 21:29:24,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:24,089 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-26 21:29:24,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:29:24,089 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-26 21:29:24,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:29:24,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:24,090 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1] [2018-09-26 21:29:24,090 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:24,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:24,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810823, now seen corresponding path program 4 times [2018-09-26 21:29:24,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:24,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:24,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:24,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:24,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:24,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:24,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:24,198 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:24,210 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:24,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:24,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:24,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:24,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:29:24,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:29:24,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:29:24,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:29:24,246 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-09-26 21:29:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:24,294 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-09-26 21:29:24,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:29:24,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-09-26 21:29:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:24,296 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:29:24,296 INFO L226 Difference]: Without dead ends: 22 [2018-09-26 21:29:24,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:29:24,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-26 21:29:24,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-26 21:29:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:29:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-09-26 21:29:24,302 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2018-09-26 21:29:24,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:24,302 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-09-26 21:29:24,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:29:24,302 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-09-26 21:29:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:29:24,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:24,303 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1] [2018-09-26 21:29:24,303 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:24,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:24,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561067, now seen corresponding path program 5 times [2018-09-26 21:29:24,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:24,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:24,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:24,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:24,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:24,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:24,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:24,473 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:24,487 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:29:24,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:24,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:24,523 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:24,523 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:29:24,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:29:24,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:29:24,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:29:24,525 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2018-09-26 21:29:24,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:24,580 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-09-26 21:29:24,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:29:24,581 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-09-26 21:29:24,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:24,581 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:29:24,582 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:29:24,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:29:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:29:24,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:29:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:29:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-09-26 21:29:24,586 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-09-26 21:29:24,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:24,586 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-09-26 21:29:24,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:29:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-09-26 21:29:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:29:24,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:24,587 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1] [2018-09-26 21:29:24,587 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:24,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:24,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561005, now seen corresponding path program 5 times [2018-09-26 21:29:24,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:24,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:24,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:24,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:24,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:24,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:24,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:24,729 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:24,757 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:29:24,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:24,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:24,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:24,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:29:24,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:29:24,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:29:24,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:29:24,788 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2018-09-26 21:29:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:24,839 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-09-26 21:29:24,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:29:24,840 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-09-26 21:29:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:24,840 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:29:24,840 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:29:24,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:29:24,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:29:24,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:29:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:29:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-26 21:29:24,846 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-09-26 21:29:24,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:24,847 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-26 21:29:24,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:29:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-26 21:29:24,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:29:24,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:24,848 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1] [2018-09-26 21:29:24,848 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:24,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:24,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1729447159, now seen corresponding path program 6 times [2018-09-26 21:29:24,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:24,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:24,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:24,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:24,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:24,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:24,997 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 [2018-09-26 21:29:25,006 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:25,023 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:29:25,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:25,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:25,242 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:25,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:25,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-26 21:29:25,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:29:25,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:29:25,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:29:25,266 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 17 states. [2018-09-26 21:29:25,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:25,623 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2018-09-26 21:29:25,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:29:25,623 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-09-26 21:29:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:25,624 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:29:25,624 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:29:25,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:29:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:29:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-26 21:29:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:29:25,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-26 21:29:25,633 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-09-26 21:29:25,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:25,634 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-26 21:29:25,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:29:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-26 21:29:25,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:29:25,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:25,635 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1] [2018-09-26 21:29:25,635 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:25,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:25,636 INFO L82 PathProgramCache]: Analyzing trace with hash 468808085, now seen corresponding path program 7 times [2018-09-26 21:29:25,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:25,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:25,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:25,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:25,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:25,906 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:25,907 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 [2018-09-26 21:29:25,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:25,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:25,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:25,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:29:25,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:29:25,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:29:25,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:29:25,971 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2018-09-26 21:29:25,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:26,000 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-09-26 21:29:26,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:29:26,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-09-26 21:29:26,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:26,001 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:29:26,001 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:29:26,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:29:26,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:29:26,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:29:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:29:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-09-26 21:29:26,007 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-09-26 21:29:26,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:26,007 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-09-26 21:29:26,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:29:26,008 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-09-26 21:29:26,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:29:26,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:26,008 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1] [2018-09-26 21:29:26,009 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:26,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:26,009 INFO L82 PathProgramCache]: Analyzing trace with hash 468808147, now seen corresponding path program 6 times [2018-09-26 21:29:26,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:26,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:26,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:26,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:26,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:26,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:26,164 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 [2018-09-26 21:29:26,174 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:26,190 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:29:26,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:26,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:26,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:26,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:29:26,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:29:26,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:29:26,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:29:26,224 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 11 states. [2018-09-26 21:29:26,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:26,283 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-09-26 21:29:26,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:29:26,284 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2018-09-26 21:29:26,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:26,284 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:29:26,285 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:29:26,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:29:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:29:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:29:26,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:29:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-26 21:29:26,289 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2018-09-26 21:29:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:26,290 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-26 21:29:26,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:29:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-26 21:29:26,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:29:26,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:26,291 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1] [2018-09-26 21:29:26,291 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:26,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:26,292 INFO L82 PathProgramCache]: Analyzing trace with hash -970547319, now seen corresponding path program 8 times [2018-09-26 21:29:26,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:26,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:26,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:26,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:26,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:26,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:26,427 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 [2018-09-26 21:29:26,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:26,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:26,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:26,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:26,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:26,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:29:26,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:29:26,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:29:26,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:29:26,509 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2018-09-26 21:29:26,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:26,559 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2018-09-26 21:29:26,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:29:26,559 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-09-26 21:29:26,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:26,560 INFO L225 Difference]: With dead ends: 36 [2018-09-26 21:29:26,561 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:29:26,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:29:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:29:26,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-26 21:29:26,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:29:26,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-09-26 21:29:26,565 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-09-26 21:29:26,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:26,566 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-09-26 21:29:26,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:29:26,566 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-09-26 21:29:26,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:29:26,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:26,567 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1] [2018-09-26 21:29:26,567 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:26,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:26,568 INFO L82 PathProgramCache]: Analyzing trace with hash -970547257, now seen corresponding path program 7 times [2018-09-26 21:29:26,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:26,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:26,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:26,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:26,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:26,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:26,704 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 [2018-09-26 21:29:26,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:26,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:26,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:26,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:29:26,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:29:26,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:29:26,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:29:26,778 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2018-09-26 21:29:26,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:26,819 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-09-26 21:29:26,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:29:26,819 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2018-09-26 21:29:26,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:26,820 INFO L225 Difference]: With dead ends: 38 [2018-09-26 21:29:26,820 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:29:26,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:29:26,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:29:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-26 21:29:26,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:29:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-09-26 21:29:26,826 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2018-09-26 21:29:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:26,826 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-09-26 21:29:26,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:29:26,826 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-09-26 21:29:26,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:29:26,827 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:26,827 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1] [2018-09-26 21:29:26,827 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:26,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:26,828 INFO L82 PathProgramCache]: Analyzing trace with hash 146095381, now seen corresponding path program 9 times [2018-09-26 21:29:26,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:26,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:26,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:26,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:26,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:26,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:26,986 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 [2018-09-26 21:29:26,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:27,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-26 21:29:27,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:27,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:27,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:27,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-26 21:29:27,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:29:27,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:29:27,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:29:27,548 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 23 states. [2018-09-26 21:29:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:28,230 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2018-09-26 21:29:28,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:29:28,230 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2018-09-26 21:29:28,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:28,231 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:29:28,231 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:29:28,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=603, Invalid=1203, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:29:28,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:29:28,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:29:28,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:29:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-09-26 21:29:28,240 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2018-09-26 21:29:28,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:28,240 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-09-26 21:29:28,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:29:28,240 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-09-26 21:29:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-26 21:29:28,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:28,241 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1] [2018-09-26 21:29:28,241 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:28,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:28,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1527063561, now seen corresponding path program 10 times [2018-09-26 21:29:28,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:28,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:28,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:28,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:28,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:28,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:28,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:28,420 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:28,433 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:28,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:28,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:28,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:28,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-26 21:29:28,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:29:28,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:29:28,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:29:28,644 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 25 states. [2018-09-26 21:29:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:29,078 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-09-26 21:29:29,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:29:29,078 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2018-09-26 21:29:29,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:29,079 INFO L225 Difference]: With dead ends: 44 [2018-09-26 21:29:29,079 INFO L226 Difference]: Without dead ends: 40 [2018-09-26 21:29:29,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:29:29,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-26 21:29:29,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-26 21:29:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-26 21:29:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-26 21:29:29,085 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2018-09-26 21:29:29,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:29,086 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-26 21:29:29,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:29:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-26 21:29:29,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:29:29,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:29,087 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1] [2018-09-26 21:29:29,087 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:29,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:29,087 INFO L82 PathProgramCache]: Analyzing trace with hash 458385557, now seen corresponding path program 11 times [2018-09-26 21:29:29,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:29,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:29,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:29,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:29,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:29,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:29,230 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 [2018-09-26 21:29:29,238 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:29,273 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 21:29:29,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:29,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:29,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:29,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:29:29,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:29:29,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:29:29,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:29:29,306 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2018-09-26 21:29:29,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:29,397 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-09-26 21:29:29,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:29:29,400 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-09-26 21:29:29,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:29,401 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:29:29,401 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:29:29,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:29:29,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:29:29,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:29:29,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:29:29,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-26 21:29:29,406 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-09-26 21:29:29,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:29,407 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-26 21:29:29,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:29:29,407 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-26 21:29:29,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:29:29,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:29,408 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1] [2018-09-26 21:29:29,408 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:29,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:29,408 INFO L82 PathProgramCache]: Analyzing trace with hash 458385619, now seen corresponding path program 8 times [2018-09-26 21:29:29,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:29,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:29,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:29,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:29,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:29,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:29,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:29,594 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:29,605 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:29,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:29,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:29,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:29,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:29:29,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:29:29,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:29:29,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:29:29,641 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-09-26 21:29:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:29,724 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2018-09-26 21:29:29,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:29:29,724 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2018-09-26 21:29:29,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:29,725 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:29:29,725 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:29:29,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:29:29,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:29:29,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:29:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:29:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-09-26 21:29:29,731 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2018-09-26 21:29:29,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:29,731 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-09-26 21:29:29,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:29:29,731 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-09-26 21:29:29,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-26 21:29:29,734 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:29,734 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1] [2018-09-26 21:29:29,734 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:29,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:29,734 INFO L82 PathProgramCache]: Analyzing trace with hash 2064533641, now seen corresponding path program 12 times [2018-09-26 21:29:29,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:29,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:29,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:29,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:29,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:29,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:29,935 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 [2018-09-26 21:29:29,944 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:30,051 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-26 21:29:30,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:30,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:30,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:30,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-26 21:29:30,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:29:30,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:29:30,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:29:30,612 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 29 states. [2018-09-26 21:29:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:31,172 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2018-09-26 21:29:31,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:29:31,174 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 41 [2018-09-26 21:29:31,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:31,175 INFO L225 Difference]: With dead ends: 50 [2018-09-26 21:29:31,175 INFO L226 Difference]: Without dead ends: 46 [2018-09-26 21:29:31,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=978, Invalid=1992, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:29:31,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-26 21:29:31,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-26 21:29:31,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-26 21:29:31,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-26 21:29:31,180 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2018-09-26 21:29:31,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:31,181 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-26 21:29:31,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:29:31,181 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-26 21:29:31,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:29:31,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:31,182 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1] [2018-09-26 21:29:31,182 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:31,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:31,182 INFO L82 PathProgramCache]: Analyzing trace with hash 591459349, now seen corresponding path program 13 times [2018-09-26 21:29:31,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:31,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:31,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:31,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:31,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:31,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:31,382 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 [2018-09-26 21:29:31,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:31,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:31,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:31,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:29:31,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:29:31,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:29:31,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:29:31,453 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2018-09-26 21:29:31,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:31,505 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-09-26 21:29:31,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:29:31,505 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-26 21:29:31,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:31,507 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:29:31,507 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:29:31,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:29:31,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:29:31,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:29:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:29:31,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-09-26 21:29:31,512 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-09-26 21:29:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:31,512 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-09-26 21:29:31,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:29:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-09-26 21:29:31,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:29:31,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:31,513 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1] [2018-09-26 21:29:31,513 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:31,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:31,514 INFO L82 PathProgramCache]: Analyzing trace with hash 591459411, now seen corresponding path program 9 times [2018-09-26 21:29:31,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:31,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:31,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:31,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:31,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:31,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:31,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:31,781 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:31,850 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:29:31,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:31,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:31,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:31,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:29:31,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:29:31,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:29:31,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:29:31,894 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2018-09-26 21:29:32,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:32,115 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2018-09-26 21:29:32,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:29:32,121 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-09-26 21:29:32,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:32,121 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:29:32,121 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:29:32,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:29:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:29:32,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:29:32,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:29:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-09-26 21:29:32,125 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2018-09-26 21:29:32,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:32,126 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-09-26 21:29:32,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:29:32,126 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-09-26 21:29:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-26 21:29:32,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:32,126 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1] [2018-09-26 21:29:32,127 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:32,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:32,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910391, now seen corresponding path program 14 times [2018-09-26 21:29:32,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:32,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:32,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:32,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:32,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:32,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:32,343 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 [2018-09-26 21:29:32,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:32,366 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:32,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:32,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:32,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:32,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:29:32,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:29:32,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:29:32,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:29:32,407 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2018-09-26 21:29:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:32,480 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2018-09-26 21:29:32,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:29:32,480 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2018-09-26 21:29:32,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:32,481 INFO L225 Difference]: With dead ends: 54 [2018-09-26 21:29:32,481 INFO L226 Difference]: Without dead ends: 50 [2018-09-26 21:29:32,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:29:32,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-26 21:29:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-26 21:29:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-26 21:29:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-26 21:29:32,486 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-09-26 21:29:32,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:32,486 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-26 21:29:32,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:29:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-26 21:29:32,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-26 21:29:32,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:32,487 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1] [2018-09-26 21:29:32,487 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:32,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:32,487 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910329, now seen corresponding path program 10 times [2018-09-26 21:29:32,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:32,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:32,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:32,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:32,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:32,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:32,705 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 [2018-09-26 21:29:32,713 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:32,729 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:32,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:32,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:32,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:32,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:29:32,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:29:32,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:29:32,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:29:32,761 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 18 states. [2018-09-26 21:29:32,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:32,836 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2018-09-26 21:29:32,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:29:32,836 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2018-09-26 21:29:32,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:32,837 INFO L225 Difference]: With dead ends: 56 [2018-09-26 21:29:32,837 INFO L226 Difference]: Without dead ends: 52 [2018-09-26 21:29:32,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:29:32,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-26 21:29:32,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-26 21:29:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-26 21:29:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-26 21:29:32,841 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2018-09-26 21:29:32,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:32,842 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-26 21:29:32,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:29:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-26 21:29:32,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:29:32,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:32,846 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1] [2018-09-26 21:29:32,847 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:32,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:32,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1979244437, now seen corresponding path program 15 times [2018-09-26 21:29:32,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:32,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:32,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:32,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:32,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:33,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:33,264 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 [2018-09-26 21:29:33,271 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:33,330 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-26 21:29:33,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:33,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:33,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:33,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-26 21:29:33,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:29:33,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:29:33,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:29:33,635 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 35 states. [2018-09-26 21:29:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:34,513 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-09-26 21:29:34,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:29:34,513 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 50 [2018-09-26 21:29:34,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:34,514 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:29:34,514 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:29:34,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1443, Invalid=2979, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:29:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:29:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-26 21:29:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:29:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-26 21:29:34,520 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2018-09-26 21:29:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:34,520 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-26 21:29:34,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:29:34,520 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-26 21:29:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-26 21:29:34,521 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:34,521 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1] [2018-09-26 21:29:34,521 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:34,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:34,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545079, now seen corresponding path program 16 times [2018-09-26 21:29:34,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:34,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:34,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:34,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:34,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:35,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:35,190 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 [2018-09-26 21:29:35,197 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:35,214 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:35,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:35,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:35,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:35,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:29:35,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:29:35,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:29:35,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:29:35,245 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 19 states. [2018-09-26 21:29:35,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:35,316 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-09-26 21:29:35,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:29:35,316 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2018-09-26 21:29:35,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:35,317 INFO L225 Difference]: With dead ends: 60 [2018-09-26 21:29:35,317 INFO L226 Difference]: Without dead ends: 56 [2018-09-26 21:29:35,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:29:35,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-26 21:29:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-26 21:29:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-26 21:29:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-26 21:29:35,322 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-09-26 21:29:35,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:35,322 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-26 21:29:35,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:29:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-26 21:29:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-26 21:29:35,322 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:35,323 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1] [2018-09-26 21:29:35,323 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:35,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:35,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545017, now seen corresponding path program 11 times [2018-09-26 21:29:35,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:35,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:35,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:35,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:35,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:35,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:35,828 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 [2018-09-26 21:29:35,835 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:35,863 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-26 21:29:35,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:35,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:35,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:35,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:29:35,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:29:35,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:29:35,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:29:35,905 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2018-09-26 21:29:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:35,967 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2018-09-26 21:29:35,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:29:35,967 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2018-09-26 21:29:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:35,968 INFO L225 Difference]: With dead ends: 62 [2018-09-26 21:29:35,968 INFO L226 Difference]: Without dead ends: 58 [2018-09-26 21:29:35,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:29:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-26 21:29:35,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-26 21:29:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-26 21:29:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-09-26 21:29:35,972 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2018-09-26 21:29:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:35,973 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-09-26 21:29:35,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:29:35,973 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-09-26 21:29:35,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:29:35,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:35,974 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1] [2018-09-26 21:29:35,974 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:35,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:35,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364501, now seen corresponding path program 17 times [2018-09-26 21:29:35,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:35,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:35,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:35,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:35,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:36,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:36,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:36,193 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:36,220 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-26 21:29:36,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:36,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:36,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:36,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:29:36,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:29:36,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:29:36,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:29:36,264 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 20 states. [2018-09-26 21:29:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:36,323 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-09-26 21:29:36,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:29:36,323 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2018-09-26 21:29:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:36,324 INFO L225 Difference]: With dead ends: 63 [2018-09-26 21:29:36,324 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:29:36,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:29:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:29:36,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:29:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:29:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-26 21:29:36,328 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-09-26 21:29:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:36,328 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-26 21:29:36,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:29:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-26 21:29:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:29:36,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:36,329 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1] [2018-09-26 21:29:36,329 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:36,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:36,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364563, now seen corresponding path program 12 times [2018-09-26 21:29:36,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:36,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:36,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:36,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:36,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:36,648 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:36,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:36,656 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:36,689 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:29:36,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:36,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:36,703 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:36,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:36,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:29:36,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:29:36,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:29:36,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:29:36,724 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 21 states. [2018-09-26 21:29:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:36,834 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2018-09-26 21:29:36,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:29:36,835 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2018-09-26 21:29:36,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:36,836 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:29:36,836 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:29:36,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:29:36,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:29:36,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:29:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:29:36,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-26 21:29:36,840 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2018-09-26 21:29:36,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:36,840 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-26 21:29:36,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:29:36,840 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-26 21:29:36,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-26 21:29:36,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:36,841 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1] [2018-09-26 21:29:36,841 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:36,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:36,842 INFO L82 PathProgramCache]: Analyzing trace with hash -411470327, now seen corresponding path program 18 times [2018-09-26 21:29:36,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:36,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:36,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:36,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:36,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 19 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:37,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:37,165 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 [2018-09-26 21:29:37,187 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:37,217 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-26 21:29:37,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:37,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:37,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:37,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-26 21:29:37,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:29:37,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:29:37,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:29:37,576 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 41 states. [2018-09-26 21:29:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:38,570 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-09-26 21:29:38,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:29:38,571 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 59 [2018-09-26 21:29:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:38,572 INFO L225 Difference]: With dead ends: 68 [2018-09-26 21:29:38,572 INFO L226 Difference]: Without dead ends: 64 [2018-09-26 21:29:38,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1998, Invalid=4164, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:29:38,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-26 21:29:38,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-26 21:29:38,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-26 21:29:38,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-09-26 21:29:38,583 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2018-09-26 21:29:38,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:38,584 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-09-26 21:29:38,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:29:38,584 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-09-26 21:29:38,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:29:38,585 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:38,585 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1] [2018-09-26 21:29:38,585 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:38,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:38,585 INFO L82 PathProgramCache]: Analyzing trace with hash -274409835, now seen corresponding path program 19 times [2018-09-26 21:29:38,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:38,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:38,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:38,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:38,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:39,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:39,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:39,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:39,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:39,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:39,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:29:39,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:29:39,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:29:39,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:29:39,148 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 22 states. [2018-09-26 21:29:39,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:39,188 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2018-09-26 21:29:39,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:29:39,189 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2018-09-26 21:29:39,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:39,190 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:29:39,190 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:29:39,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:29:39,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:29:39,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:29:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:29:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-26 21:29:39,194 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-09-26 21:29:39,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:39,194 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-26 21:29:39,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:29:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-26 21:29:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:29:39,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:39,195 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1] [2018-09-26 21:29:39,195 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:39,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:39,196 INFO L82 PathProgramCache]: Analyzing trace with hash -274409773, now seen corresponding path program 13 times [2018-09-26 21:29:39,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:39,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:39,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:39,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:39,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:39,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:39,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:39,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:39,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:39,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:39,545 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:29:39,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:29:39,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:29:39,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:29:39,546 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 23 states. [2018-09-26 21:29:39,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:39,602 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2018-09-26 21:29:39,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:29:39,603 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2018-09-26 21:29:39,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:39,604 INFO L225 Difference]: With dead ends: 71 [2018-09-26 21:29:39,604 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:29:39,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:29:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:29:39,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-26 21:29:39,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:29:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-09-26 21:29:39,607 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2018-09-26 21:29:39,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:39,607 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-09-26 21:29:39,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:29:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-09-26 21:29:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-26 21:29:39,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:39,608 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1] [2018-09-26 21:29:39,608 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:39,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:39,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191159, now seen corresponding path program 20 times [2018-09-26 21:29:39,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:39,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:39,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:39,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:39,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:40,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:40,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:40,328 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:40,349 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:40,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:40,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:40,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:40,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:29:40,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:29:40,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:29:40,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:29:40,386 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 23 states. [2018-09-26 21:29:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:40,425 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-09-26 21:29:40,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:29:40,426 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2018-09-26 21:29:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:40,427 INFO L225 Difference]: With dead ends: 72 [2018-09-26 21:29:40,427 INFO L226 Difference]: Without dead ends: 68 [2018-09-26 21:29:40,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:29:40,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-26 21:29:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-26 21:29:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-26 21:29:40,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-09-26 21:29:40,431 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-09-26 21:29:40,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:40,431 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-09-26 21:29:40,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:29:40,432 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-09-26 21:29:40,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-26 21:29:40,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:40,432 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1] [2018-09-26 21:29:40,432 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:40,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:40,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191097, now seen corresponding path program 14 times [2018-09-26 21:29:40,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:40,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:40,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:40,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:40,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:40,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:40,792 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 [2018-09-26 21:29:40,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:40,832 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:40,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:40,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:40,865 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:40,865 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:29:40,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:29:40,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:29:40,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:29:40,866 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 24 states. [2018-09-26 21:29:40,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:40,943 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2018-09-26 21:29:40,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:29:40,943 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2018-09-26 21:29:40,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:40,944 INFO L225 Difference]: With dead ends: 74 [2018-09-26 21:29:40,945 INFO L226 Difference]: Without dead ends: 70 [2018-09-26 21:29:40,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:29:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-26 21:29:40,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-26 21:29:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-26 21:29:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-26 21:29:40,949 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2018-09-26 21:29:40,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:40,949 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-26 21:29:40,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:29:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-26 21:29:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:29:40,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:40,950 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1] [2018-09-26 21:29:40,950 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:40,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:40,951 INFO L82 PathProgramCache]: Analyzing trace with hash -544677355, now seen corresponding path program 21 times [2018-09-26 21:29:40,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:40,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:40,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:40,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:40,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 22 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:41,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:41,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:41,218 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:41,255 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-26 21:29:41,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:41,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:41,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:41,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-26 21:29:41,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:29:41,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:29:41,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:29:41,834 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 47 states. [2018-09-26 21:29:42,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:42,877 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2018-09-26 21:29:42,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:29:42,878 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 68 [2018-09-26 21:29:42,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:42,879 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:29:42,879 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:29:42,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2643, Invalid=5547, Unknown=0, NotChecked=0, Total=8190 [2018-09-26 21:29:42,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:29:42,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-26 21:29:42,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:29:42,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-26 21:29:42,885 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2018-09-26 21:29:42,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:42,885 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-26 21:29:42,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:29:42,885 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-26 21:29:42,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-26 21:29:42,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:42,886 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1] [2018-09-26 21:29:42,886 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:42,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:42,886 INFO L82 PathProgramCache]: Analyzing trace with hash -95199479, now seen corresponding path program 22 times [2018-09-26 21:29:42,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:42,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:42,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:42,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:42,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 23 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:43,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:43,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:43,582 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:43,604 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:43,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:43,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:44,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:44,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-26 21:29:44,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:29:44,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:29:44,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:29:44,064 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 49 states. [2018-09-26 21:29:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:45,702 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-09-26 21:29:45,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:29:45,703 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 71 [2018-09-26 21:29:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:45,704 INFO L225 Difference]: With dead ends: 80 [2018-09-26 21:29:45,704 INFO L226 Difference]: Without dead ends: 76 [2018-09-26 21:29:45,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2878, Invalid=6052, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:29:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-26 21:29:45,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-26 21:29:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-26 21:29:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-26 21:29:45,711 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2018-09-26 21:29:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:45,711 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-26 21:29:45,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:29:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-26 21:29:45,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:29:45,712 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:45,712 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1] [2018-09-26 21:29:45,712 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:45,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:45,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824491, now seen corresponding path program 23 times [2018-09-26 21:29:45,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:45,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:45,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:45,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:45,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:46,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:46,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:46,051 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:46,090 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-26 21:29:46,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:46,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:46,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:46,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:29:46,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:29:46,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:29:46,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:29:46,126 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 26 states. [2018-09-26 21:29:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:46,221 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2018-09-26 21:29:46,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:29:46,222 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2018-09-26 21:29:46,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:46,223 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:29:46,223 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:29:46,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:29:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:29:46,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:29:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:29:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-09-26 21:29:46,227 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-09-26 21:29:46,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:46,228 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-09-26 21:29:46,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:29:46,228 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-09-26 21:29:46,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:29:46,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:46,228 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1] [2018-09-26 21:29:46,229 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:46,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:46,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824429, now seen corresponding path program 15 times [2018-09-26 21:29:46,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:46,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:46,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:46,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:46,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:47,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:47,160 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 [2018-09-26 21:29:47,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:47,207 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-09-26 21:29:47,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:47,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:47,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:47,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:29:47,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:29:47,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:29:47,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:29:47,258 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 27 states. [2018-09-26 21:29:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:47,364 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2018-09-26 21:29:47,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:29:47,364 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2018-09-26 21:29:47,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:47,365 INFO L225 Difference]: With dead ends: 83 [2018-09-26 21:29:47,365 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:29:47,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:29:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:29:47,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-26 21:29:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:29:47,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-09-26 21:29:47,372 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2018-09-26 21:29:47,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:47,372 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-09-26 21:29:47,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:29:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-09-26 21:29:47,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-26 21:29:47,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:47,373 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1] [2018-09-26 21:29:47,373 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:47,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:47,373 INFO L82 PathProgramCache]: Analyzing trace with hash -142326903, now seen corresponding path program 24 times [2018-09-26 21:29:47,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:47,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:47,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:47,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:47,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 25 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:47,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:47,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:47,726 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:47,767 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-26 21:29:47,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:47,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:48,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:48,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-26 21:29:48,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:29:48,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:29:48,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:29:48,292 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 53 states. [2018-09-26 21:29:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:49,613 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2018-09-26 21:29:49,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:29:49,613 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 77 [2018-09-26 21:29:49,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:49,614 INFO L225 Difference]: With dead ends: 86 [2018-09-26 21:29:49,614 INFO L226 Difference]: Without dead ends: 82 [2018-09-26 21:29:49,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3378, Invalid=7128, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:29:49,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-26 21:29:49,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-26 21:29:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-26 21:29:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-09-26 21:29:49,620 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2018-09-26 21:29:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:49,620 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-09-26 21:29:49,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:29:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-09-26 21:29:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:29:49,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:49,621 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1] [2018-09-26 21:29:49,621 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:49,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:49,621 INFO L82 PathProgramCache]: Analyzing trace with hash -926607083, now seen corresponding path program 25 times [2018-09-26 21:29:49,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:49,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:49,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:49,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:49,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:49,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:49,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:49,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:50,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:50,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:50,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:29:50,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:29:50,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:29:50,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:29:50,052 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 28 states. [2018-09-26 21:29:50,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:50,183 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2018-09-26 21:29:50,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:29:50,183 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2018-09-26 21:29:50,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:50,184 INFO L225 Difference]: With dead ends: 87 [2018-09-26 21:29:50,184 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:29:50,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:29:50,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:29:50,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-26 21:29:50,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:29:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-09-26 21:29:50,188 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-09-26 21:29:50,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:50,188 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-09-26 21:29:50,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:29:50,188 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-09-26 21:29:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:29:50,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:50,189 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1] [2018-09-26 21:29:50,189 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:50,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:50,189 INFO L82 PathProgramCache]: Analyzing trace with hash -926607021, now seen corresponding path program 16 times [2018-09-26 21:29:50,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:50,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:50,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:50,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:50,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:50,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:50,687 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 [2018-09-26 21:29:50,694 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:50,717 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:50,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:50,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:50,748 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:50,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:29:50,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:29:50,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:29:50,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:29:50,749 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 29 states. [2018-09-26 21:29:50,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:50,808 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2018-09-26 21:29:50,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:29:50,809 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 80 [2018-09-26 21:29:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:50,810 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:29:50,810 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:29:50,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:29:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:29:50,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:29:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:29:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-26 21:29:50,814 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2018-09-26 21:29:50,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:50,814 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-26 21:29:50,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:29:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-26 21:29:50,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-26 21:29:50,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:50,815 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1] [2018-09-26 21:29:50,816 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:50,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:50,817 INFO L82 PathProgramCache]: Analyzing trace with hash -795359223, now seen corresponding path program 26 times [2018-09-26 21:29:50,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:50,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:50,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:50,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:50,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:51,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:51,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:51,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:51,828 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:51,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:51,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:51,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:51,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:29:51,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:29:51,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:29:51,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:29:51,867 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 29 states. [2018-09-26 21:29:51,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:51,929 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2018-09-26 21:29:51,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:29:51,930 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2018-09-26 21:29:51,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:51,931 INFO L225 Difference]: With dead ends: 90 [2018-09-26 21:29:51,931 INFO L226 Difference]: Without dead ends: 86 [2018-09-26 21:29:51,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:29:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-26 21:29:51,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-26 21:29:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-26 21:29:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-26 21:29:51,935 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-09-26 21:29:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:51,935 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-26 21:29:51,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:29:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-26 21:29:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-26 21:29:51,935 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:51,936 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1] [2018-09-26 21:29:51,936 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:51,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:51,936 INFO L82 PathProgramCache]: Analyzing trace with hash -795359161, now seen corresponding path program 17 times [2018-09-26 21:29:51,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:51,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:51,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:51,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:51,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:52,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:52,839 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 [2018-09-26 21:29:52,847 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:52,891 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-26 21:29:52,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:52,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:52,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:52,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:29:52,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:29:52,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:29:52,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:29:52,936 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 30 states. [2018-09-26 21:29:52,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:52,980 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2018-09-26 21:29:52,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:29:52,980 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2018-09-26 21:29:52,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:52,981 INFO L225 Difference]: With dead ends: 92 [2018-09-26 21:29:52,981 INFO L226 Difference]: Without dead ends: 88 [2018-09-26 21:29:52,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:29:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-26 21:29:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-26 21:29:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-26 21:29:52,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-09-26 21:29:52,985 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2018-09-26 21:29:52,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:52,986 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-09-26 21:29:52,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:29:52,986 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-09-26 21:29:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:29:52,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:52,986 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1] [2018-09-26 21:29:52,986 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:52,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:52,987 INFO L82 PathProgramCache]: Analyzing trace with hash 789398677, now seen corresponding path program 27 times [2018-09-26 21:29:52,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:52,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:52,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:52,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:52,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 28 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:53,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:53,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:53,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:53,423 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-26 21:29:53,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:53,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:54,108 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:54,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-26 21:29:54,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:29:54,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:29:54,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=2523, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:29:54,109 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 59 states. [2018-09-26 21:29:56,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:56,140 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2018-09-26 21:29:56,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:29:56,141 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 86 [2018-09-26 21:29:56,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:56,142 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:29:56,142 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:29:56,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4203, Invalid=8907, Unknown=0, NotChecked=0, Total=13110 [2018-09-26 21:29:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:29:56,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-26 21:29:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:29:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-26 21:29:56,147 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-09-26 21:29:56,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:56,148 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-26 21:29:56,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:29:56,148 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-26 21:29:56,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-26 21:29:56,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:56,149 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1] [2018-09-26 21:29:56,149 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:56,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:56,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2031479945, now seen corresponding path program 28 times [2018-09-26 21:29:56,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:56,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:56,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:56,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:56,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:56,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:56,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:56,651 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 [2018-09-26 21:29:56,660 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:56,688 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:56,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:56,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:56,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:56,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:29:56,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:29:56,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:29:56,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:29:56,722 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 31 states. [2018-09-26 21:29:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:56,828 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2018-09-26 21:29:56,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:29:56,829 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 89 [2018-09-26 21:29:56,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:56,830 INFO L225 Difference]: With dead ends: 96 [2018-09-26 21:29:56,830 INFO L226 Difference]: Without dead ends: 92 [2018-09-26 21:29:56,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:29:56,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-26 21:29:56,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-26 21:29:56,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-26 21:29:56,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-09-26 21:29:56,835 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-09-26 21:29:56,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:56,835 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-09-26 21:29:56,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:29:56,835 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-09-26 21:29:56,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-26 21:29:56,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:56,836 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1] [2018-09-26 21:29:56,836 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:56,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:56,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2031480007, now seen corresponding path program 18 times [2018-09-26 21:29:56,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:56,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:56,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:56,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:56,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:57,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:57,296 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 [2018-09-26 21:29:57,303 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:57,350 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-26 21:29:57,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:57,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:57,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:57,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:29:57,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:29:57,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:29:57,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:29:57,399 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 32 states. [2018-09-26 21:29:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:57,931 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2018-09-26 21:29:57,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:29:57,931 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2018-09-26 21:29:57,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:57,932 INFO L225 Difference]: With dead ends: 98 [2018-09-26 21:29:57,932 INFO L226 Difference]: Without dead ends: 94 [2018-09-26 21:29:57,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:29:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-26 21:29:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-26 21:29:57,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-26 21:29:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-09-26 21:29:57,937 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2018-09-26 21:29:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:57,937 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-09-26 21:29:57,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:29:57,938 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-09-26 21:29:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:29:57,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:57,938 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1] [2018-09-26 21:29:57,938 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:57,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:57,939 INFO L82 PathProgramCache]: Analyzing trace with hash -563687403, now seen corresponding path program 29 times [2018-09-26 21:29:57,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:57,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:57,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:57,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:57,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:58,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:58,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:58,517 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:58,575 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-26 21:29:58,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:58,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:58,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:58,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:29:58,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:29:58,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:29:58,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:29:58,612 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 32 states. [2018-09-26 21:29:58,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:58,706 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2018-09-26 21:29:58,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:29:58,707 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2018-09-26 21:29:58,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:58,708 INFO L225 Difference]: With dead ends: 99 [2018-09-26 21:29:58,708 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:29:58,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:29:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:29:58,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-26 21:29:58,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:29:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-26 21:29:58,712 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-09-26 21:29:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:58,712 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-26 21:29:58,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:29:58,713 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-26 21:29:58,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:29:58,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:58,713 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1] [2018-09-26 21:29:58,713 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:58,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:58,714 INFO L82 PathProgramCache]: Analyzing trace with hash -563687341, now seen corresponding path program 19 times [2018-09-26 21:29:58,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:58,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:58,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:58,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:58,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:00,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:00,001 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 [2018-09-26 21:30:00,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:00,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:00,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:00,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:00,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:30:00,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:30:00,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:30:00,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:30:00,076 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2018-09-26 21:30:00,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:00,154 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2018-09-26 21:30:00,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:30:00,155 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 92 [2018-09-26 21:30:00,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:00,156 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:30:00,156 INFO L226 Difference]: Without dead ends: 97 [2018-09-26 21:30:00,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:30:00,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-26 21:30:00,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-26 21:30:00,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:30:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-09-26 21:30:00,160 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2018-09-26 21:30:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:00,160 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-09-26 21:30:00,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:30:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-09-26 21:30:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-26 21:30:00,161 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:00,161 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1] [2018-09-26 21:30:00,161 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:00,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:00,161 INFO L82 PathProgramCache]: Analyzing trace with hash 512143625, now seen corresponding path program 30 times [2018-09-26 21:30:00,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:00,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:00,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:00,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:00,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 31 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:00,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:00,949 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 [2018-09-26 21:30:00,957 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:01,007 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-26 21:30:01,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:01,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:01,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:01,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-26 21:30:01,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:30:01,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:30:01,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1088, Invalid=3072, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:30:01,921 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 65 states. [2018-09-26 21:30:04,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:04,276 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2018-09-26 21:30:04,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:30:04,277 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 95 [2018-09-26 21:30:04,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:04,278 INFO L225 Difference]: With dead ends: 104 [2018-09-26 21:30:04,279 INFO L226 Difference]: Without dead ends: 100 [2018-09-26 21:30:04,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5118, Invalid=10884, Unknown=0, NotChecked=0, Total=16002 [2018-09-26 21:30:04,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-26 21:30:04,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-26 21:30:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-26 21:30:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-26 21:30:04,284 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2018-09-26 21:30:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:04,284 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-26 21:30:04,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:30:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-26 21:30:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:30:04,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:04,285 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1] [2018-09-26 21:30:04,285 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:04,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:04,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336021, now seen corresponding path program 31 times [2018-09-26 21:30:04,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:04,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:04,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:04,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:04,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:04,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:04,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:04,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:04,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:04,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:04,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:30:04,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:30:04,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:30:04,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:30:04,987 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 34 states. [2018-09-26 21:30:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:05,255 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2018-09-26 21:30:05,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:30:05,256 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2018-09-26 21:30:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:05,257 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:30:05,257 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:30:05,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:30:05,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:30:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:30:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:30:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-26 21:30:05,262 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-09-26 21:30:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:05,262 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-26 21:30:05,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:30:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-26 21:30:05,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:30:05,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:05,263 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1] [2018-09-26 21:30:05,263 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:05,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:05,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336083, now seen corresponding path program 20 times [2018-09-26 21:30:05,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:05,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:05,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:05,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:05,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:06,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:06,323 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 [2018-09-26 21:30:06,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:06,365 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:06,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:06,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:06,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:06,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:30:06,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:30:06,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:30:06,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:30:06,401 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 35 states. [2018-09-26 21:30:06,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:06,479 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2018-09-26 21:30:06,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:30:06,479 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 98 [2018-09-26 21:30:06,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:06,480 INFO L225 Difference]: With dead ends: 107 [2018-09-26 21:30:06,480 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 21:30:06,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:30:06,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 21:30:06,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-26 21:30:06,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-26 21:30:06,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-09-26 21:30:06,484 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2018-09-26 21:30:06,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:06,485 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-09-26 21:30:06,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:30:06,485 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-09-26 21:30:06,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-26 21:30:06,485 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:06,485 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1] [2018-09-26 21:30:06,486 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:06,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:06,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918391, now seen corresponding path program 32 times [2018-09-26 21:30:06,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:06,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:06,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:06,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:06,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:07,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:07,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:07,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:07,548 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:07,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:07,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:07,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:07,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:30:07,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:30:07,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:30:07,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:30:07,590 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 35 states. [2018-09-26 21:30:07,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:07,775 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2018-09-26 21:30:07,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:30:07,776 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 101 [2018-09-26 21:30:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:07,777 INFO L225 Difference]: With dead ends: 108 [2018-09-26 21:30:07,777 INFO L226 Difference]: Without dead ends: 104 [2018-09-26 21:30:07,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:30:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-26 21:30:07,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-26 21:30:07,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-26 21:30:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-09-26 21:30:07,782 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-09-26 21:30:07,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:07,783 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-09-26 21:30:07,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:30:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-09-26 21:30:07,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-26 21:30:07,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:07,783 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1] [2018-09-26 21:30:07,784 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:07,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:07,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918329, now seen corresponding path program 21 times [2018-09-26 21:30:07,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:07,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:07,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:07,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:07,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:08,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:08,393 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 [2018-09-26 21:30:08,400 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:08,454 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-26 21:30:08,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:08,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:08,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:08,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:30:08,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:30:08,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:30:08,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:30:08,506 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 36 states. [2018-09-26 21:30:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:08,692 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2018-09-26 21:30:08,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:30:08,693 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 101 [2018-09-26 21:30:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:08,694 INFO L225 Difference]: With dead ends: 110 [2018-09-26 21:30:08,694 INFO L226 Difference]: Without dead ends: 106 [2018-09-26 21:30:08,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:30:08,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-26 21:30:08,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-26 21:30:08,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-26 21:30:08,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-26 21:30:08,701 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2018-09-26 21:30:08,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:08,701 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-26 21:30:08,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:30:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-26 21:30:08,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:30:08,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:08,702 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1] [2018-09-26 21:30:08,702 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:08,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:08,703 INFO L82 PathProgramCache]: Analyzing trace with hash 875431701, now seen corresponding path program 33 times [2018-09-26 21:30:08,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:08,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:08,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:08,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:08,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 34 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:09,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:09,364 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 [2018-09-26 21:30:09,384 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:09,442 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-09-26 21:30:09,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:09,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:10,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:10,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-26 21:30:10,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:30:10,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:30:10,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:30:10,373 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 71 states. [2018-09-26 21:30:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:12,952 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2018-09-26 21:30:12,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:30:12,953 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 104 [2018-09-26 21:30:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:12,953 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:30:12,954 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:30:12,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3433 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6123, Invalid=13059, Unknown=0, NotChecked=0, Total=19182 [2018-09-26 21:30:12,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:30:12,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-26 21:30:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:30:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-09-26 21:30:12,958 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2018-09-26 21:30:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:12,959 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-09-26 21:30:12,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:30:12,959 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-09-26 21:30:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-26 21:30:12,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:12,960 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1] [2018-09-26 21:30:12,960 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:12,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:12,960 INFO L82 PathProgramCache]: Analyzing trace with hash 945822217, now seen corresponding path program 34 times [2018-09-26 21:30:12,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:12,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:12,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:12,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:12,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:13,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:13,766 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 [2018-09-26 21:30:13,776 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:13,807 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:13,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:13,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:13,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:13,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:30:13,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:30:13,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:30:13,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:30:13,844 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 37 states. [2018-09-26 21:30:13,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:13,923 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2018-09-26 21:30:13,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:30:13,923 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2018-09-26 21:30:13,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:13,924 INFO L225 Difference]: With dead ends: 114 [2018-09-26 21:30:13,924 INFO L226 Difference]: Without dead ends: 110 [2018-09-26 21:30:13,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:30:13,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-26 21:30:13,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-26 21:30:13,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-26 21:30:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-26 21:30:13,929 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-09-26 21:30:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:13,929 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-26 21:30:13,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:30:13,929 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-26 21:30:13,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-26 21:30:13,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:13,930 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1] [2018-09-26 21:30:13,930 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:13,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:13,930 INFO L82 PathProgramCache]: Analyzing trace with hash 945822279, now seen corresponding path program 22 times [2018-09-26 21:30:13,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:13,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:13,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:13,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:13,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:14,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:14,564 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 [2018-09-26 21:30:14,573 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:14,604 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:14,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:14,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:14,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:14,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:30:14,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:30:14,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:30:14,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:30:14,643 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 38 states. [2018-09-26 21:30:14,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:14,698 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-09-26 21:30:14,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:30:14,699 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2018-09-26 21:30:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:14,700 INFO L225 Difference]: With dead ends: 116 [2018-09-26 21:30:14,700 INFO L226 Difference]: Without dead ends: 112 [2018-09-26 21:30:14,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:30:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-26 21:30:14,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-26 21:30:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-26 21:30:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-09-26 21:30:14,704 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-09-26 21:30:14,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:14,704 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-09-26 21:30:14,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:30:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-09-26 21:30:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 21:30:14,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:14,705 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1] [2018-09-26 21:30:14,705 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:14,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:14,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643925, now seen corresponding path program 35 times [2018-09-26 21:30:14,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:14,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:14,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:14,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:14,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:15,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:15,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:15,378 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:15,440 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-26 21:30:15,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:15,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:15,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:15,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:30:15,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:30:15,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:30:15,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:30:15,487 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 38 states. [2018-09-26 21:30:15,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:15,574 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2018-09-26 21:30:15,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:30:15,575 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2018-09-26 21:30:15,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:15,576 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:30:15,576 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:30:15,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:30:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:30:15,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-26 21:30:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 21:30:15,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-09-26 21:30:15,580 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-09-26 21:30:15,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:15,581 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-09-26 21:30:15,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:30:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-09-26 21:30:15,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 21:30:15,581 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:15,581 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1] [2018-09-26 21:30:15,582 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:15,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:15,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643987, now seen corresponding path program 23 times [2018-09-26 21:30:15,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:15,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:15,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:15,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:15,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:16,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:16,440 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 [2018-09-26 21:30:16,450 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:16,512 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-26 21:30:16,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:16,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:16,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:16,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:30:16,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:30:16,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:30:16,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:30:16,559 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 39 states. [2018-09-26 21:30:16,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:16,653 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2018-09-26 21:30:16,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:30:16,654 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 110 [2018-09-26 21:30:16,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:16,655 INFO L225 Difference]: With dead ends: 119 [2018-09-26 21:30:16,655 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:30:16,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:30:16,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:30:16,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-26 21:30:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:30:16,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-26 21:30:16,659 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 110 [2018-09-26 21:30:16,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:16,659 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-26 21:30:16,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:30:16,659 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-26 21:30:16,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-26 21:30:16,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:16,660 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1] [2018-09-26 21:30:16,660 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:16,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:16,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1445413239, now seen corresponding path program 36 times [2018-09-26 21:30:16,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:16,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:16,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:16,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:16,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 37 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:18,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:18,481 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 [2018-09-26 21:30:18,489 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:18,552 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-26 21:30:18,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:18,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:19,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:19,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-26 21:30:19,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:30:19,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:30:19,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=4332, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:30:19,787 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 77 states. [2018-09-26 21:30:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:22,829 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2018-09-26 21:30:22,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:30:22,829 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 113 [2018-09-26 21:30:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:22,830 INFO L225 Difference]: With dead ends: 122 [2018-09-26 21:30:22,831 INFO L226 Difference]: Without dead ends: 118 [2018-09-26 21:30:22,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7218, Invalid=15432, Unknown=0, NotChecked=0, Total=22650 [2018-09-26 21:30:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-26 21:30:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-26 21:30:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-26 21:30:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-09-26 21:30:22,835 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 113 [2018-09-26 21:30:22,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:22,836 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-09-26 21:30:22,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:30:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-09-26 21:30:22,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:30:22,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:22,836 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1] [2018-09-26 21:30:22,836 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:22,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:22,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745685, now seen corresponding path program 37 times [2018-09-26 21:30:22,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:22,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:22,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:22,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:22,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:23,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:23,794 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 [2018-09-26 21:30:23,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:23,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:23,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:23,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:30:23,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:30:23,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:30:23,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:30:23,893 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 40 states. [2018-09-26 21:30:24,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:24,093 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2018-09-26 21:30:24,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:30:24,094 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2018-09-26 21:30:24,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:24,095 INFO L225 Difference]: With dead ends: 123 [2018-09-26 21:30:24,095 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 21:30:24,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:30:24,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 21:30:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-26 21:30:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 21:30:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-26 21:30:24,100 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-09-26 21:30:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:24,100 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-26 21:30:24,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:30:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-26 21:30:24,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:30:24,100 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:24,101 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1] [2018-09-26 21:30:24,101 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:24,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:24,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745747, now seen corresponding path program 24 times [2018-09-26 21:30:24,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:24,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:24,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:24,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:24,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:25,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:25,573 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 [2018-09-26 21:30:25,581 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:26,061 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-09-26 21:30:26,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:26,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:26,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:26,113 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:30:26,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:30:26,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:30:26,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:30:26,114 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 41 states. [2018-09-26 21:30:26,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:26,239 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2018-09-26 21:30:26,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:30:26,239 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 116 [2018-09-26 21:30:26,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:26,240 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:30:26,240 INFO L226 Difference]: Without dead ends: 121 [2018-09-26 21:30:26,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:30:26,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-26 21:30:26,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-26 21:30:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 21:30:26,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-26 21:30:26,244 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2018-09-26 21:30:26,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:26,244 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-26 21:30:26,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:30:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-26 21:30:26,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-26 21:30:26,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:26,245 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1] [2018-09-26 21:30:26,245 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:26,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:26,245 INFO L82 PathProgramCache]: Analyzing trace with hash 308544265, now seen corresponding path program 38 times [2018-09-26 21:30:26,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:26,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:26,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:26,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:26,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:27,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:27,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-26 21:30:27,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:27,128 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:27,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:27,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:27,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:27,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:30:27,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:30:27,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:30:27,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:30:27,185 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 41 states. [2018-09-26 21:30:27,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:27,294 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2018-09-26 21:30:27,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:30:27,295 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 119 [2018-09-26 21:30:27,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:27,296 INFO L225 Difference]: With dead ends: 126 [2018-09-26 21:30:27,296 INFO L226 Difference]: Without dead ends: 122 [2018-09-26 21:30:27,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:30:27,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-26 21:30:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-26 21:30:27,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-26 21:30:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-09-26 21:30:27,301 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2018-09-26 21:30:27,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:27,301 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-09-26 21:30:27,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:30:27,301 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-09-26 21:30:27,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-26 21:30:27,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:27,302 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1] [2018-09-26 21:30:27,302 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:27,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:27,303 INFO L82 PathProgramCache]: Analyzing trace with hash 308544327, now seen corresponding path program 25 times [2018-09-26 21:30:27,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:27,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:27,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:27,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:27,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:27,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:27,935 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 [2018-09-26 21:30:27,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:27,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:28,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:28,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:30:28,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:30:28,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:30:28,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:30:28,046 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 42 states. [2018-09-26 21:30:28,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:28,247 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2018-09-26 21:30:28,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:30:28,248 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 119 [2018-09-26 21:30:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:28,249 INFO L225 Difference]: With dead ends: 128 [2018-09-26 21:30:28,249 INFO L226 Difference]: Without dead ends: 124 [2018-09-26 21:30:28,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:30:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-26 21:30:28,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-26 21:30:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-26 21:30:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-09-26 21:30:28,253 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2018-09-26 21:30:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:28,253 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-09-26 21:30:28,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:30:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-09-26 21:30:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 21:30:28,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:28,254 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1] [2018-09-26 21:30:28,254 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:28,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:28,254 INFO L82 PathProgramCache]: Analyzing trace with hash 613624213, now seen corresponding path program 39 times [2018-09-26 21:30:28,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:28,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:28,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:28,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:28,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 40 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:28,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:28,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:28,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:29,054 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-09-26 21:30:29,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:29,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:30,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:30,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-26 21:30:30,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-26 21:30:30,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-26 21:30:30,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1763, Invalid=5043, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:30:30,329 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 83 states. [2018-09-26 21:30:33,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:33,813 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2018-09-26 21:30:33,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-26 21:30:33,814 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 122 [2018-09-26 21:30:33,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:33,815 INFO L225 Difference]: With dead ends: 131 [2018-09-26 21:30:33,815 INFO L226 Difference]: Without dead ends: 127 [2018-09-26 21:30:33,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4759 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8403, Invalid=18003, Unknown=0, NotChecked=0, Total=26406 [2018-09-26 21:30:33,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-26 21:30:33,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-26 21:30:33,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-26 21:30:33,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-09-26 21:30:33,821 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2018-09-26 21:30:33,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:33,821 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-09-26 21:30:33,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-26 21:30:33,821 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-09-26 21:30:33,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-26 21:30:33,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:33,822 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1] [2018-09-26 21:30:33,822 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:33,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:33,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556745, now seen corresponding path program 40 times [2018-09-26 21:30:33,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:33,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:33,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:33,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:33,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:34,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:34,477 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 [2018-09-26 21:30:34,492 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:34,548 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:34,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:34,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:34,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:34,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:30:34,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:30:34,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:30:34,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:30:34,604 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 43 states. [2018-09-26 21:30:34,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:34,691 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2018-09-26 21:30:34,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:30:34,691 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 125 [2018-09-26 21:30:34,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:34,692 INFO L225 Difference]: With dead ends: 132 [2018-09-26 21:30:34,692 INFO L226 Difference]: Without dead ends: 128 [2018-09-26 21:30:34,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:30:34,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-26 21:30:34,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-26 21:30:34,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-26 21:30:34,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2018-09-26 21:30:34,697 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2018-09-26 21:30:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:34,698 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2018-09-26 21:30:34,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:30:34,698 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2018-09-26 21:30:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-26 21:30:34,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:34,699 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1] [2018-09-26 21:30:34,699 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:34,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:34,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556807, now seen corresponding path program 26 times [2018-09-26 21:30:34,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:34,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:34,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:34,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:34,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:35,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:35,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:35,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:35,431 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:35,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:35,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:35,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:35,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:30:35,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:30:35,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:30:35,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:30:35,491 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 44 states. [2018-09-26 21:30:36,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:36,762 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2018-09-26 21:30:36,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:30:36,763 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 125 [2018-09-26 21:30:36,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:36,763 INFO L225 Difference]: With dead ends: 134 [2018-09-26 21:30:36,764 INFO L226 Difference]: Without dead ends: 130 [2018-09-26 21:30:36,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:30:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-26 21:30:36,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-26 21:30:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-26 21:30:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-09-26 21:30:36,768 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 125 [2018-09-26 21:30:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:36,768 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-09-26 21:30:36,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:30:36,769 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-09-26 21:30:36,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:30:36,769 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:36,769 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1] [2018-09-26 21:30:36,770 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:36,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:36,770 INFO L82 PathProgramCache]: Analyzing trace with hash -819137259, now seen corresponding path program 41 times [2018-09-26 21:30:36,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:36,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:36,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:36,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:36,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:38,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:38,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:38,636 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:38,909 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-26 21:30:38,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:38,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:38,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:38,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:30:38,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:30:38,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:30:38,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:30:38,972 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 44 states. [2018-09-26 21:30:39,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:39,376 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2018-09-26 21:30:39,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:30:39,376 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2018-09-26 21:30:39,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:39,377 INFO L225 Difference]: With dead ends: 135 [2018-09-26 21:30:39,377 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:30:39,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:30:39,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:30:39,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-26 21:30:39,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 21:30:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-26 21:30:39,380 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-09-26 21:30:39,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:39,380 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-26 21:30:39,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:30:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-26 21:30:39,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:30:39,381 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:39,381 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1] [2018-09-26 21:30:39,381 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:39,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:39,382 INFO L82 PathProgramCache]: Analyzing trace with hash -819137197, now seen corresponding path program 27 times [2018-09-26 21:30:39,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:39,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:39,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:39,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:39,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:40,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:40,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:40,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:40,191 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2018-09-26 21:30:40,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:40,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:40,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:40,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:30:40,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:30:40,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:30:40,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:30:40,252 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 45 states. [2018-09-26 21:30:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:40,390 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2018-09-26 21:30:40,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:30:40,391 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 128 [2018-09-26 21:30:40,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:40,392 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:30:40,392 INFO L226 Difference]: Without dead ends: 133 [2018-09-26 21:30:40,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:30:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-26 21:30:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-26 21:30:40,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-26 21:30:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-09-26 21:30:40,397 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-09-26 21:30:40,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:40,397 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-09-26 21:30:40,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:30:40,398 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-09-26 21:30:40,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-26 21:30:40,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:40,399 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1] [2018-09-26 21:30:40,399 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:40,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:40,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1087532041, now seen corresponding path program 42 times [2018-09-26 21:30:40,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:40,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:40,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:40,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:40,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 43 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:41,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:41,149 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 [2018-09-26 21:30:41,156 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:41,229 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-26 21:30:41,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:41,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:43,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:43,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-26 21:30:43,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-26 21:30:43,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-26 21:30:43,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=5808, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:30:43,064 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 89 states. [2018-09-26 21:30:46,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:46,930 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2018-09-26 21:30:46,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:30:46,930 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 131 [2018-09-26 21:30:46,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:46,932 INFO L225 Difference]: With dead ends: 140 [2018-09-26 21:30:46,932 INFO L226 Difference]: Without dead ends: 136 [2018-09-26 21:30:46,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9678, Invalid=20772, Unknown=0, NotChecked=0, Total=30450 [2018-09-26 21:30:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-26 21:30:46,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-26 21:30:46,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-26 21:30:46,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-09-26 21:30:46,937 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 131 [2018-09-26 21:30:46,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:46,937 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-09-26 21:30:46,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-26 21:30:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-09-26 21:30:46,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-26 21:30:46,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:46,938 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1] [2018-09-26 21:30:46,939 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:46,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:46,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158741, now seen corresponding path program 43 times [2018-09-26 21:30:46,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:46,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:46,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:46,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:46,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:47,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:47,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:47,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:47,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:47,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:47,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:30:47,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:30:47,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:30:47,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:30:47,739 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 46 states. [2018-09-26 21:30:47,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:47,827 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2018-09-26 21:30:47,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:30:47,827 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2018-09-26 21:30:47,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:47,828 INFO L225 Difference]: With dead ends: 141 [2018-09-26 21:30:47,828 INFO L226 Difference]: Without dead ends: 137 [2018-09-26 21:30:47,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:30:47,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-26 21:30:47,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-26 21:30:47,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-26 21:30:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-09-26 21:30:47,833 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-09-26 21:30:47,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:47,833 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-09-26 21:30:47,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:30:47,833 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-09-26 21:30:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-26 21:30:47,834 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:47,834 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1] [2018-09-26 21:30:47,834 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:47,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:47,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158803, now seen corresponding path program 28 times [2018-09-26 21:30:47,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:47,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:47,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:47,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:47,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:48,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:48,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:48,623 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:48,662 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:48,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:48,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:48,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:48,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:30:48,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:30:48,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:30:48,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:30:48,721 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 47 states. [2018-09-26 21:30:48,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:48,890 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2018-09-26 21:30:48,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:30:48,891 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 134 [2018-09-26 21:30:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:48,892 INFO L225 Difference]: With dead ends: 143 [2018-09-26 21:30:48,892 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 21:30:48,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:30:48,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 21:30:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-26 21:30:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-26 21:30:48,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-09-26 21:30:48,898 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 134 [2018-09-26 21:30:48,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:48,898 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-09-26 21:30:48,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:30:48,899 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-09-26 21:30:48,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-26 21:30:48,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:48,899 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1] [2018-09-26 21:30:48,899 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:48,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:48,900 INFO L82 PathProgramCache]: Analyzing trace with hash -742027127, now seen corresponding path program 44 times [2018-09-26 21:30:48,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:48,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:48,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:48,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:48,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:49,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:49,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:49,675 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:49,716 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:49,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:49,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:49,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:49,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:30:49,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:30:49,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:30:49,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:30:49,779 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 47 states. [2018-09-26 21:30:50,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:50,037 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2018-09-26 21:30:50,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:30:50,038 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 137 [2018-09-26 21:30:50,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:50,039 INFO L225 Difference]: With dead ends: 144 [2018-09-26 21:30:50,039 INFO L226 Difference]: Without dead ends: 140 [2018-09-26 21:30:50,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:30:50,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-26 21:30:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-26 21:30:50,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-26 21:30:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-09-26 21:30:50,043 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2018-09-26 21:30:50,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:50,043 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-09-26 21:30:50,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:30:50,043 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-09-26 21:30:50,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-26 21:30:50,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:50,044 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1] [2018-09-26 21:30:50,044 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:50,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:50,045 INFO L82 PathProgramCache]: Analyzing trace with hash -742027065, now seen corresponding path program 29 times [2018-09-26 21:30:50,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:50,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:50,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:50,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:50,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:50,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:50,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:50,875 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:50,956 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-26 21:30:50,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:50,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:51,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:51,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:30:51,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:30:51,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:30:51,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:30:51,002 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 48 states. [2018-09-26 21:30:51,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:51,124 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2018-09-26 21:30:51,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:30:51,124 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 137 [2018-09-26 21:30:51,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:51,125 INFO L225 Difference]: With dead ends: 146 [2018-09-26 21:30:51,125 INFO L226 Difference]: Without dead ends: 142 [2018-09-26 21:30:51,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:30:51,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-26 21:30:51,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-26 21:30:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-26 21:30:51,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2018-09-26 21:30:51,130 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 137 [2018-09-26 21:30:51,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:51,131 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2018-09-26 21:30:51,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:30:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2018-09-26 21:30:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-26 21:30:51,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:51,132 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1] [2018-09-26 21:30:51,132 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:51,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:51,132 INFO L82 PathProgramCache]: Analyzing trace with hash 467971093, now seen corresponding path program 45 times [2018-09-26 21:30:51,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:51,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:51,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:51,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:51,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:52,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:52,380 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 [2018-09-26 21:30:52,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:52,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-09-26 21:30:52,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:52,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:52,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:52,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:30:52,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:30:52,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:30:52,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:30:52,535 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 48 states. [2018-09-26 21:30:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:52,615 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2018-09-26 21:30:52,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:30:52,615 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2018-09-26 21:30:52,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:52,616 INFO L225 Difference]: With dead ends: 147 [2018-09-26 21:30:52,616 INFO L226 Difference]: Without dead ends: 143 [2018-09-26 21:30:52,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:30:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-26 21:30:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-26 21:30:52,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-26 21:30:52,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-09-26 21:30:52,622 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-09-26 21:30:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:52,622 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-09-26 21:30:52,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:30:52,623 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-09-26 21:30:52,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-26 21:30:52,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:52,623 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1] [2018-09-26 21:30:52,624 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:52,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:52,624 INFO L82 PathProgramCache]: Analyzing trace with hash 467971155, now seen corresponding path program 30 times [2018-09-26 21:30:52,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:52,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:52,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:52,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:52,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:53,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:53,528 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 [2018-09-26 21:30:53,535 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:53,622 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-09-26 21:30:53,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:53,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:53,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:53,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:30:53,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:30:53,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:30:53,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:30:53,684 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 49 states. [2018-09-26 21:30:54,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:54,786 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-09-26 21:30:54,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:30:54,786 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 140 [2018-09-26 21:30:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:54,787 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:30:54,787 INFO L226 Difference]: Without dead ends: 145 [2018-09-26 21:30:54,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:30:54,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-26 21:30:54,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-26 21:30:54,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-26 21:30:54,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-26 21:30:54,792 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2018-09-26 21:30:54,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:54,792 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-26 21:30:54,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:30:54,792 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-26 21:30:54,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-26 21:30:54,793 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:54,793 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1] [2018-09-26 21:30:54,794 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:54,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:54,794 INFO L82 PathProgramCache]: Analyzing trace with hash -135572215, now seen corresponding path program 46 times [2018-09-26 21:30:54,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:54,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:54,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:54,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:54,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 47 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:55,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:55,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:55,814 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:55,854 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:55,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:55,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:57,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:57,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-26 21:30:57,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-26 21:30:57,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-26 21:30:57,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2400, Invalid=6912, Unknown=0, NotChecked=0, Total=9312 [2018-09-26 21:30:57,960 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 97 states. [2018-09-26 21:31:02,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:02,518 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2018-09-26 21:31:02,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-26 21:31:02,519 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 143 [2018-09-26 21:31:02,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:02,520 INFO L225 Difference]: With dead ends: 152 [2018-09-26 21:31:02,520 INFO L226 Difference]: Without dead ends: 148 [2018-09-26 21:31:02,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6579 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=11518, Invalid=24772, Unknown=0, NotChecked=0, Total=36290 [2018-09-26 21:31:02,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-26 21:31:02,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-26 21:31:02,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-26 21:31:02,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2018-09-26 21:31:02,526 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2018-09-26 21:31:02,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:02,527 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2018-09-26 21:31:02,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-26 21:31:02,527 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2018-09-26 21:31:02,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-26 21:31:02,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:02,528 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1] [2018-09-26 21:31:02,528 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:02,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:02,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159787, now seen corresponding path program 47 times [2018-09-26 21:31:02,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:02,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:02,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:02,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:02,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:03,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:03,447 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 [2018-09-26 21:31:03,454 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:03,542 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-26 21:31:03,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:03,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:03,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:03,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:31:03,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:31:03,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:31:03,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:31:03,603 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 50 states. [2018-09-26 21:31:03,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:03,687 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2018-09-26 21:31:03,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:31:03,687 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2018-09-26 21:31:03,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:03,689 INFO L225 Difference]: With dead ends: 153 [2018-09-26 21:31:03,689 INFO L226 Difference]: Without dead ends: 149 [2018-09-26 21:31:03,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:31:03,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-26 21:31:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-26 21:31:03,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-26 21:31:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-09-26 21:31:03,693 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-09-26 21:31:03,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:03,693 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-09-26 21:31:03,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:31:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-09-26 21:31:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-26 21:31:03,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:03,694 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1] [2018-09-26 21:31:03,694 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:03,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:03,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159725, now seen corresponding path program 31 times [2018-09-26 21:31:03,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:03,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:03,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:03,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:04,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:04,592 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 [2018-09-26 21:31:04,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:04,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:04,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:04,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:31:04,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:31:04,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:31:04,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:31:04,684 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 51 states. [2018-09-26 21:31:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:04,818 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-09-26 21:31:04,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:31:04,819 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 146 [2018-09-26 21:31:04,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:04,820 INFO L225 Difference]: With dead ends: 155 [2018-09-26 21:31:04,820 INFO L226 Difference]: Without dead ends: 151 [2018-09-26 21:31:04,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:31:04,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-26 21:31:04,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-26 21:31:04,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-26 21:31:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-26 21:31:04,824 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2018-09-26 21:31:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:04,824 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-26 21:31:04,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:31:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-26 21:31:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-26 21:31:04,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:04,825 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1] [2018-09-26 21:31:04,825 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:04,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:04,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1691072905, now seen corresponding path program 48 times [2018-09-26 21:31:04,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:04,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:04,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:04,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:04,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 49 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:05,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:05,743 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 [2018-09-26 21:31:05,750 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:05,844 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-26 21:31:05,844 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:05,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 3577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:07,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:07,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-26 21:31:07,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-26 21:31:07,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-26 21:31:07,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2600, Invalid=7500, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:31:07,893 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 101 states. [2018-09-26 21:31:12,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:12,604 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2018-09-26 21:31:12,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-26 21:31:12,604 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 149 [2018-09-26 21:31:12,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:12,605 INFO L225 Difference]: With dead ends: 158 [2018-09-26 21:31:12,605 INFO L226 Difference]: Without dead ends: 154 [2018-09-26 21:31:12,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7153 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=12498, Invalid=26904, Unknown=0, NotChecked=0, Total=39402 [2018-09-26 21:31:12,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-26 21:31:12,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-26 21:31:12,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-26 21:31:12,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2018-09-26 21:31:12,611 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 149 [2018-09-26 21:31:12,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:12,611 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2018-09-26 21:31:12,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-26 21:31:12,611 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2018-09-26 21:31:12,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-26 21:31:12,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:12,612 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1] [2018-09-26 21:31:12,612 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:12,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:12,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030187, now seen corresponding path program 49 times [2018-09-26 21:31:12,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:12,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:12,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:12,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:12,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:13,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:13,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:13,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:13,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:13,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:13,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:31:13,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:31:13,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:31:13,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:31:13,864 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 52 states. [2018-09-26 21:31:14,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:14,199 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2018-09-26 21:31:14,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:31:14,200 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 152 [2018-09-26 21:31:14,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:14,200 INFO L225 Difference]: With dead ends: 159 [2018-09-26 21:31:14,200 INFO L226 Difference]: Without dead ends: 155 [2018-09-26 21:31:14,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:31:14,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-26 21:31:14,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-26 21:31:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-26 21:31:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-26 21:31:14,207 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-09-26 21:31:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:14,207 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-26 21:31:14,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:31:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-26 21:31:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-26 21:31:14,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:14,208 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1] [2018-09-26 21:31:14,208 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:14,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:14,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030125, now seen corresponding path program 32 times [2018-09-26 21:31:14,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:14,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:14,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:14,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:14,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:15,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:15,195 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 [2018-09-26 21:31:15,203 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:15,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:15,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:15,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:15,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:15,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:31:15,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:31:15,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:31:15,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:31:15,302 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 53 states. [2018-09-26 21:31:15,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:15,398 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2018-09-26 21:31:15,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:31:15,399 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 152 [2018-09-26 21:31:15,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:15,400 INFO L225 Difference]: With dead ends: 161 [2018-09-26 21:31:15,400 INFO L226 Difference]: Without dead ends: 157 [2018-09-26 21:31:15,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:31:15,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-26 21:31:15,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-26 21:31:15,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-26 21:31:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-09-26 21:31:15,405 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 152 [2018-09-26 21:31:15,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:15,405 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-09-26 21:31:15,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:31:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-09-26 21:31:15,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-26 21:31:15,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:15,406 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1] [2018-09-26 21:31:15,406 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:15,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:15,407 INFO L82 PathProgramCache]: Analyzing trace with hash 200195593, now seen corresponding path program 50 times [2018-09-26 21:31:15,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:15,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:15,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:15,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:15,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:16,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:16,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:16,418 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:16,473 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:16,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:16,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:16,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:16,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:31:16,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:31:16,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:31:16,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:31:16,534 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 53 states. [2018-09-26 21:31:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:16,691 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2018-09-26 21:31:16,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:31:16,691 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 155 [2018-09-26 21:31:16,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:16,692 INFO L225 Difference]: With dead ends: 162 [2018-09-26 21:31:16,692 INFO L226 Difference]: Without dead ends: 158 [2018-09-26 21:31:16,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:31:16,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-26 21:31:16,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-26 21:31:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-26 21:31:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2018-09-26 21:31:16,695 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 155 [2018-09-26 21:31:16,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:16,696 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2018-09-26 21:31:16,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:31:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2018-09-26 21:31:16,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-26 21:31:16,696 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:16,697 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1] [2018-09-26 21:31:16,697 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:16,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:16,697 INFO L82 PathProgramCache]: Analyzing trace with hash 200195655, now seen corresponding path program 33 times [2018-09-26 21:31:16,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:16,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:16,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:16,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:16,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:18,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:18,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:18,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:18,218 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-26 21:31:18,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:18,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:18,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:18,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:31:18,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:31:18,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:31:18,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:31:18,285 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 54 states. [2018-09-26 21:31:18,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:18,448 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2018-09-26 21:31:18,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:31:18,448 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 155 [2018-09-26 21:31:18,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:18,449 INFO L225 Difference]: With dead ends: 164 [2018-09-26 21:31:18,449 INFO L226 Difference]: Without dead ends: 160 [2018-09-26 21:31:18,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:31:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-26 21:31:18,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-26 21:31:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-26 21:31:18,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-09-26 21:31:18,453 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2018-09-26 21:31:18,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:18,454 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-09-26 21:31:18,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:31:18,454 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-09-26 21:31:18,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-26 21:31:18,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:18,455 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1] [2018-09-26 21:31:18,455 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:18,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:18,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1681224043, now seen corresponding path program 51 times [2018-09-26 21:31:18,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:18,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:18,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:18,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:18,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 52 proven. 3978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:19,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:19,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:19,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:19,595 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-09-26 21:31:19,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:19,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:21,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:21,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-26 21:31:21,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-26 21:31:21,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-26 21:31:21,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2915, Invalid=8427, Unknown=0, NotChecked=0, Total=11342 [2018-09-26 21:31:21,603 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 107 states. [2018-09-26 21:31:26,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:26,828 INFO L93 Difference]: Finished difference Result 167 states and 174 transitions. [2018-09-26 21:31:26,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-26 21:31:26,828 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 158 [2018-09-26 21:31:26,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:26,830 INFO L225 Difference]: With dead ends: 167 [2018-09-26 21:31:26,830 INFO L226 Difference]: Without dead ends: 163 [2018-09-26 21:31:26,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8059 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=14043, Invalid=30267, Unknown=0, NotChecked=0, Total=44310 [2018-09-26 21:31:26,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-26 21:31:26,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-26 21:31:26,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-26 21:31:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-09-26 21:31:26,835 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 158 [2018-09-26 21:31:26,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:26,836 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-09-26 21:31:26,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-26 21:31:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-09-26 21:31:26,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-26 21:31:26,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:26,837 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1] [2018-09-26 21:31:26,838 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:26,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:26,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387319, now seen corresponding path program 52 times [2018-09-26 21:31:26,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:26,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:26,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:26,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:26,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:28,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:28,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:28,201 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:28,251 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:28,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:28,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:28,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:28,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:31:28,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:31:28,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:31:28,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:31:28,322 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 55 states. [2018-09-26 21:31:28,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:28,474 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2018-09-26 21:31:28,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:31:28,475 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 161 [2018-09-26 21:31:28,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:28,476 INFO L225 Difference]: With dead ends: 168 [2018-09-26 21:31:28,476 INFO L226 Difference]: Without dead ends: 164 [2018-09-26 21:31:28,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:31:28,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-26 21:31:28,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-26 21:31:28,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-26 21:31:28,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-09-26 21:31:28,480 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 161 [2018-09-26 21:31:28,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:28,481 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-09-26 21:31:28,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:31:28,481 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-09-26 21:31:28,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-26 21:31:28,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:28,482 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1] [2018-09-26 21:31:28,482 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:28,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:28,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387257, now seen corresponding path program 34 times [2018-09-26 21:31:28,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:28,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:28,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:28,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:28,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:29,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:29,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:29,577 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:29,622 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:29,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:29,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:29,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:29,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:31:29,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:31:29,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:31:29,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:31:29,671 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 56 states. [2018-09-26 21:31:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:29,848 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2018-09-26 21:31:29,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:31:29,849 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 161 [2018-09-26 21:31:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:29,849 INFO L225 Difference]: With dead ends: 170 [2018-09-26 21:31:29,850 INFO L226 Difference]: Without dead ends: 166 [2018-09-26 21:31:29,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:31:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-26 21:31:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-26 21:31:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-26 21:31:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-09-26 21:31:29,855 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 161 [2018-09-26 21:31:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:29,855 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-09-26 21:31:29,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:31:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-09-26 21:31:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-26 21:31:29,856 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:29,856 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1] [2018-09-26 21:31:29,856 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:29,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:29,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694699, now seen corresponding path program 53 times [2018-09-26 21:31:29,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:29,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:29,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:29,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:29,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:31,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:31,012 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 [2018-09-26 21:31:31,019 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:31,121 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-26 21:31:31,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:31,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:31,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:31,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:31:31,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:31:31,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:31:31,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:31:31,171 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 56 states. [2018-09-26 21:31:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:31,261 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2018-09-26 21:31:31,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:31:31,262 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 164 [2018-09-26 21:31:31,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:31,263 INFO L225 Difference]: With dead ends: 171 [2018-09-26 21:31:31,263 INFO L226 Difference]: Without dead ends: 167 [2018-09-26 21:31:31,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:31:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-26 21:31:31,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-26 21:31:31,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-26 21:31:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-09-26 21:31:31,268 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-09-26 21:31:31,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:31,268 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-09-26 21:31:31,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:31:31,268 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-09-26 21:31:31,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-26 21:31:31,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:31,269 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1] [2018-09-26 21:31:31,270 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:31,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:31,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694637, now seen corresponding path program 35 times [2018-09-26 21:31:31,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:31,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:31,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:31,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:31,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:32,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:32,512 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 [2018-09-26 21:31:32,519 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:32,619 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-26 21:31:32,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:32,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:32,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:32,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:31:32,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:31:32,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:31:32,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:31:32,669 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 57 states. [2018-09-26 21:31:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:32,888 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-09-26 21:31:32,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:31:32,888 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 164 [2018-09-26 21:31:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:32,889 INFO L225 Difference]: With dead ends: 173 [2018-09-26 21:31:32,890 INFO L226 Difference]: Without dead ends: 169 [2018-09-26 21:31:32,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:31:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-26 21:31:32,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-26 21:31:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-26 21:31:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-09-26 21:31:32,903 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 164 [2018-09-26 21:31:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:32,903 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-09-26 21:31:32,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:31:32,903 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-09-26 21:31:32,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-26 21:31:32,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:32,904 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1] [2018-09-26 21:31:32,904 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:32,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:32,905 INFO L82 PathProgramCache]: Analyzing trace with hash -249780471, now seen corresponding path program 54 times [2018-09-26 21:31:32,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:32,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:32,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:32,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:32,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 55 proven. 4455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:34,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:34,051 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 [2018-09-26 21:31:34,059 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:34,159 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-09-26 21:31:34,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:34,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:36,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 4510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:36,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:36,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-26 21:31:36,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-26 21:31:36,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-26 21:31:36,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3248, Invalid=9408, Unknown=0, NotChecked=0, Total=12656 [2018-09-26 21:31:36,410 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 113 states. [2018-09-26 21:31:42,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:42,311 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2018-09-26 21:31:42,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-26 21:31:42,311 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 167 [2018-09-26 21:31:42,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:42,312 INFO L225 Difference]: With dead ends: 176 [2018-09-26 21:31:42,313 INFO L226 Difference]: Without dead ends: 172 [2018-09-26 21:31:42,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9019 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=15678, Invalid=33828, Unknown=0, NotChecked=0, Total=49506 [2018-09-26 21:31:42,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-09-26 21:31:42,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-09-26 21:31:42,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-26 21:31:42,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2018-09-26 21:31:42,318 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2018-09-26 21:31:42,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:42,319 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2018-09-26 21:31:42,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-26 21:31:42,319 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2018-09-26 21:31:42,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-26 21:31:42,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:42,320 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1] [2018-09-26 21:31:42,320 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:42,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:42,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751445, now seen corresponding path program 55 times [2018-09-26 21:31:42,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:42,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:42,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:42,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:42,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:43,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:43,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:43,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:43,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:43,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:43,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:31:43,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:31:43,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:31:43,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:31:43,889 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand 58 states. [2018-09-26 21:31:44,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:44,050 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2018-09-26 21:31:44,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:31:44,051 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 170 [2018-09-26 21:31:44,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:44,052 INFO L225 Difference]: With dead ends: 177 [2018-09-26 21:31:44,052 INFO L226 Difference]: Without dead ends: 173 [2018-09-26 21:31:44,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:31:44,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-26 21:31:44,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-26 21:31:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-26 21:31:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-09-26 21:31:44,056 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-09-26 21:31:44,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:44,057 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-09-26 21:31:44,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:31:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-09-26 21:31:44,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-26 21:31:44,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:44,057 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1] [2018-09-26 21:31:44,058 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:44,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:44,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751507, now seen corresponding path program 36 times [2018-09-26 21:31:44,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:44,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:44,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:44,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:44,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:45,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:45,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:45,758 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:45,860 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2018-09-26 21:31:45,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:45,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:45,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:45,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:31:45,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:31:45,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:31:45,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:31:45,914 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 59 states. [2018-09-26 21:31:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:46,084 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2018-09-26 21:31:46,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:31:46,084 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 170 [2018-09-26 21:31:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:46,085 INFO L225 Difference]: With dead ends: 179 [2018-09-26 21:31:46,086 INFO L226 Difference]: Without dead ends: 175 [2018-09-26 21:31:46,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:31:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-26 21:31:46,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-26 21:31:46,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-26 21:31:46,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-26 21:31:46,089 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-09-26 21:31:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:46,089 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-26 21:31:46,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:31:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-26 21:31:46,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-26 21:31:46,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:46,090 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1] [2018-09-26 21:31:46,090 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:46,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:46,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428215, now seen corresponding path program 56 times [2018-09-26 21:31:46,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:46,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:46,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:46,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:46,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:47,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:47,313 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 [2018-09-26 21:31:47,320 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:47,371 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:47,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:47,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:47,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:47,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-26 21:31:47,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:31:47,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:31:47,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:31:47,423 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 59 states. [2018-09-26 21:31:47,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:47,594 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2018-09-26 21:31:47,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:31:47,595 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 173 [2018-09-26 21:31:47,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:47,596 INFO L225 Difference]: With dead ends: 180 [2018-09-26 21:31:47,596 INFO L226 Difference]: Without dead ends: 176 [2018-09-26 21:31:47,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:31:47,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-26 21:31:47,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-26 21:31:47,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-26 21:31:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-09-26 21:31:47,601 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 173 [2018-09-26 21:31:47,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:47,601 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-09-26 21:31:47,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:31:47,601 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-09-26 21:31:47,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-26 21:31:47,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:47,602 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1] [2018-09-26 21:31:47,602 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:47,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:47,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428153, now seen corresponding path program 37 times [2018-09-26 21:31:47,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:47,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:47,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:47,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:47,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:49,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:49,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:49,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:49,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:49,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:49,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-26 21:31:49,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:31:49,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:31:49,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:31:49,364 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 60 states. [2018-09-26 21:31:49,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:49,480 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2018-09-26 21:31:49,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:31:49,480 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 173 [2018-09-26 21:31:49,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:49,481 INFO L225 Difference]: With dead ends: 182 [2018-09-26 21:31:49,482 INFO L226 Difference]: Without dead ends: 178 [2018-09-26 21:31:49,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:31:49,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-26 21:31:49,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-09-26 21:31:49,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-09-26 21:31:49,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-09-26 21:31:49,486 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 173 [2018-09-26 21:31:49,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:49,486 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-09-26 21:31:49,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:31:49,486 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-09-26 21:31:49,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-26 21:31:49,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:49,487 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1] [2018-09-26 21:31:49,488 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:49,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:49,488 INFO L82 PathProgramCache]: Analyzing trace with hash 200069397, now seen corresponding path program 57 times [2018-09-26 21:31:49,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:49,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:49,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:49,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:49,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 58 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:50,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:50,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:50,792 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:50,910 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-09-26 21:31:50,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:50,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:53,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:53,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-26 21:31:53,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-26 21:31:53,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-26 21:31:53,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3599, Invalid=10443, Unknown=0, NotChecked=0, Total=14042 [2018-09-26 21:31:53,825 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 119 states. [2018-09-26 21:32:00,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:00,327 INFO L93 Difference]: Finished difference Result 185 states and 192 transitions. [2018-09-26 21:32:00,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-26 21:32:00,327 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 176 [2018-09-26 21:32:00,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:00,328 INFO L225 Difference]: With dead ends: 185 [2018-09-26 21:32:00,329 INFO L226 Difference]: Without dead ends: 181 [2018-09-26 21:32:00,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10033 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=17403, Invalid=37587, Unknown=0, NotChecked=0, Total=54990 [2018-09-26 21:32:00,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-26 21:32:00,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-26 21:32:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-26 21:32:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-26 21:32:00,334 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 176 [2018-09-26 21:32:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:00,334 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-26 21:32:00,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-26 21:32:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-26 21:32:00,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-26 21:32:00,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:00,336 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1] [2018-09-26 21:32:00,336 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:00,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:00,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761783, now seen corresponding path program 58 times [2018-09-26 21:32:00,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:00,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:00,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:00,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:00,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:01,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:01,637 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 [2018-09-26 21:32:01,647 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:01,701 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:01,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:01,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:01,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:01,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-26 21:32:01,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-26 21:32:01,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-26 21:32:01,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:32:01,755 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 61 states. [2018-09-26 21:32:01,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:01,873 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2018-09-26 21:32:01,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:32:01,873 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 179 [2018-09-26 21:32:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:01,874 INFO L225 Difference]: With dead ends: 186 [2018-09-26 21:32:01,874 INFO L226 Difference]: Without dead ends: 182 [2018-09-26 21:32:01,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:32:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-09-26 21:32:01,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-09-26 21:32:01,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-09-26 21:32:01,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-09-26 21:32:01,878 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 179 [2018-09-26 21:32:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:01,878 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-09-26 21:32:01,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-26 21:32:01,878 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-09-26 21:32:01,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-26 21:32:01,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:01,879 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1] [2018-09-26 21:32:01,879 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:01,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:01,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761721, now seen corresponding path program 38 times [2018-09-26 21:32:01,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:01,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:01,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:01,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:01,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:03,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:03,537 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 [2018-09-26 21:32:03,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:03,600 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:03,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:03,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:03,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:03,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-26 21:32:03,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:32:03,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:32:03,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:32:03,688 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 62 states. [2018-09-26 21:32:04,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:04,031 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2018-09-26 21:32:04,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:32:04,031 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 179 [2018-09-26 21:32:04,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:04,032 INFO L225 Difference]: With dead ends: 188 [2018-09-26 21:32:04,032 INFO L226 Difference]: Without dead ends: 184 [2018-09-26 21:32:04,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:32:04,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-09-26 21:32:04,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-09-26 21:32:04,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-26 21:32:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2018-09-26 21:32:04,036 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 179 [2018-09-26 21:32:04,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:04,036 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2018-09-26 21:32:04,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:32:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2018-09-26 21:32:04,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-26 21:32:04,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:04,037 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1] [2018-09-26 21:32:04,037 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:04,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:04,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1282737003, now seen corresponding path program 59 times [2018-09-26 21:32:04,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:04,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:04,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:04,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:04,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:05,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:05,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:05,376 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:05,491 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-26 21:32:05,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:05,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:05,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:05,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:32:05,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:32:05,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:32:05,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:32:05,548 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 62 states. [2018-09-26 21:32:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:05,677 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2018-09-26 21:32:05,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:32:05,677 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 182 [2018-09-26 21:32:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:05,679 INFO L225 Difference]: With dead ends: 189 [2018-09-26 21:32:05,679 INFO L226 Difference]: Without dead ends: 185 [2018-09-26 21:32:05,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:32:05,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-26 21:32:05,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-26 21:32:05,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-26 21:32:05,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-26 21:32:05,683 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-09-26 21:32:05,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:05,683 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-26 21:32:05,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:32:05,684 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-26 21:32:05,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-26 21:32:05,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:05,684 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1] [2018-09-26 21:32:05,684 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:05,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:05,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1282736941, now seen corresponding path program 39 times [2018-09-26 21:32:05,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:05,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:05,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:05,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:05,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:07,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:07,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:07,104 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:07,225 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2018-09-26 21:32:07,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:07,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:07,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:07,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:32:07,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-26 21:32:07,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-26 21:32:07,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:32:07,280 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 63 states. [2018-09-26 21:32:07,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:07,468 INFO L93 Difference]: Finished difference Result 191 states and 197 transitions. [2018-09-26 21:32:07,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:32:07,468 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 182 [2018-09-26 21:32:07,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:07,469 INFO L225 Difference]: With dead ends: 191 [2018-09-26 21:32:07,469 INFO L226 Difference]: Without dead ends: 187 [2018-09-26 21:32:07,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:32:07,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-26 21:32:07,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-26 21:32:07,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-26 21:32:07,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-09-26 21:32:07,472 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2018-09-26 21:32:07,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:07,473 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-09-26 21:32:07,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-26 21:32:07,473 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-09-26 21:32:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-09-26 21:32:07,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:07,473 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1] [2018-09-26 21:32:07,474 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:07,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:07,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1692584823, now seen corresponding path program 60 times [2018-09-26 21:32:07,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:07,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:07,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:07,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:07,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 61 proven. 5490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:09,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:09,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:09,319 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:09,434 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-09-26 21:32:09,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:09,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 5551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:12,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:12,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-26 21:32:12,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-26 21:32:12,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-26 21:32:12,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3968, Invalid=11532, Unknown=0, NotChecked=0, Total=15500 [2018-09-26 21:32:12,260 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 125 states. [2018-09-26 21:32:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:19,567 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2018-09-26 21:32:19,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-26 21:32:19,568 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 185 [2018-09-26 21:32:19,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:19,569 INFO L225 Difference]: With dead ends: 194 [2018-09-26 21:32:19,569 INFO L226 Difference]: Without dead ends: 190 [2018-09-26 21:32:19,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11101 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=19218, Invalid=41544, Unknown=0, NotChecked=0, Total=60762 [2018-09-26 21:32:19,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-09-26 21:32:19,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-09-26 21:32:19,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-09-26 21:32:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-09-26 21:32:19,574 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 185 [2018-09-26 21:32:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:19,574 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-09-26 21:32:19,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-26 21:32:19,574 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-09-26 21:32:19,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-26 21:32:19,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:19,575 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1] [2018-09-26 21:32:19,575 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:19,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:19,575 INFO L82 PathProgramCache]: Analyzing trace with hash -876967915, now seen corresponding path program 61 times [2018-09-26 21:32:19,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:19,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:19,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:19,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:19,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:21,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:21,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:21,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:21,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:21,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:21,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:32:21,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:32:21,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:32:21,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:32:21,193 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 64 states. [2018-09-26 21:32:21,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:21,409 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2018-09-26 21:32:21,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:32:21,410 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 188 [2018-09-26 21:32:21,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:21,411 INFO L225 Difference]: With dead ends: 195 [2018-09-26 21:32:21,412 INFO L226 Difference]: Without dead ends: 191 [2018-09-26 21:32:21,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:32:21,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-26 21:32:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-26 21:32:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-26 21:32:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-26 21:32:21,417 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-09-26 21:32:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:21,417 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-26 21:32:21,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:32:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-26 21:32:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-26 21:32:21,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:21,419 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1] [2018-09-26 21:32:21,419 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:21,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:21,419 INFO L82 PathProgramCache]: Analyzing trace with hash -876967853, now seen corresponding path program 40 times [2018-09-26 21:32:21,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:21,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:21,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:21,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:21,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:22,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:22,964 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 [2018-09-26 21:32:22,972 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:23,027 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:23,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:23,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:23,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:23,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:32:23,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:32:23,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:32:23,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:32:23,085 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 65 states. [2018-09-26 21:32:23,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:23,266 INFO L93 Difference]: Finished difference Result 197 states and 203 transitions. [2018-09-26 21:32:23,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:32:23,266 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 188 [2018-09-26 21:32:23,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:23,268 INFO L225 Difference]: With dead ends: 197 [2018-09-26 21:32:23,268 INFO L226 Difference]: Without dead ends: 193 [2018-09-26 21:32:23,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:32:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-26 21:32:23,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-26 21:32:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-26 21:32:23,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-09-26 21:32:23,273 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 188 [2018-09-26 21:32:23,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:23,273 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-09-26 21:32:23,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:32:23,273 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-09-26 21:32:23,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-26 21:32:23,274 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:23,274 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1] [2018-09-26 21:32:23,274 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:23,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:23,275 INFO L82 PathProgramCache]: Analyzing trace with hash 536344841, now seen corresponding path program 62 times [2018-09-26 21:32:23,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:23,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:23,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:23,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:23,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:25,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:25,035 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 [2018-09-26 21:32:25,042 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:25,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:25,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:25,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:25,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:25,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-26 21:32:25,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:32:25,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:32:25,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:32:25,158 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 65 states. [2018-09-26 21:32:25,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:25,326 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2018-09-26 21:32:25,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:32:25,327 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 191 [2018-09-26 21:32:25,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:25,327 INFO L225 Difference]: With dead ends: 198 [2018-09-26 21:32:25,327 INFO L226 Difference]: Without dead ends: 194 [2018-09-26 21:32:25,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:32:25,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-26 21:32:25,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-09-26 21:32:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-09-26 21:32:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2018-09-26 21:32:25,331 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 191 [2018-09-26 21:32:25,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:25,331 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2018-09-26 21:32:25,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:32:25,331 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2018-09-26 21:32:25,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-26 21:32:25,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:25,332 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1] [2018-09-26 21:32:25,332 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:25,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:25,332 INFO L82 PathProgramCache]: Analyzing trace with hash 536344903, now seen corresponding path program 41 times [2018-09-26 21:32:25,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:25,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:25,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:25,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:25,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:26,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:26,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:26,949 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:27,076 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-26 21:32:27,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:27,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:27,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:27,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-26 21:32:27,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:32:27,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:32:27,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:32:27,135 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 66 states. [2018-09-26 21:32:27,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:27,327 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2018-09-26 21:32:27,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:32:27,327 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 191 [2018-09-26 21:32:27,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:27,328 INFO L225 Difference]: With dead ends: 200 [2018-09-26 21:32:27,328 INFO L226 Difference]: Without dead ends: 196 [2018-09-26 21:32:27,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:32:27,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-09-26 21:32:27,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-09-26 21:32:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-26 21:32:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-09-26 21:32:27,332 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 191 [2018-09-26 21:32:27,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:27,333 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-09-26 21:32:27,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:32:27,333 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-09-26 21:32:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-26 21:32:27,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:27,334 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1] [2018-09-26 21:32:27,334 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:27,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:27,334 INFO L82 PathProgramCache]: Analyzing trace with hash 972256149, now seen corresponding path program 63 times [2018-09-26 21:32:27,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:27,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:27,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:27,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:27,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 64 proven. 6048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:28,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:28,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:28,873 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:29,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-09-26 21:32:29,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:29,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:32,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:32,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-26 21:32:32,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-26 21:32:32,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-26 21:32:32,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4355, Invalid=12675, Unknown=0, NotChecked=0, Total=17030 [2018-09-26 21:32:32,175 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 131 states. [2018-09-26 21:32:40,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:40,247 INFO L93 Difference]: Finished difference Result 203 states and 210 transitions. [2018-09-26 21:32:40,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-26 21:32:40,248 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 194 [2018-09-26 21:32:40,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:40,248 INFO L225 Difference]: With dead ends: 203 [2018-09-26 21:32:40,249 INFO L226 Difference]: Without dead ends: 199 [2018-09-26 21:32:40,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12223 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=21123, Invalid=45699, Unknown=0, NotChecked=0, Total=66822 [2018-09-26 21:32:40,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-26 21:32:40,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-26 21:32:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-26 21:32:40,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-09-26 21:32:40,254 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2018-09-26 21:32:40,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:40,254 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-09-26 21:32:40,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-26 21:32:40,255 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-09-26 21:32:40,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-26 21:32:40,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:40,255 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1] [2018-09-26 21:32:40,256 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:40,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:40,256 INFO L82 PathProgramCache]: Analyzing trace with hash -775070327, now seen corresponding path program 64 times [2018-09-26 21:32:40,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:40,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:40,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:40,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:40,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:41,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:41,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:41,850 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:41,909 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:41,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:41,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:41,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:41,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-26 21:32:41,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-26 21:32:41,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-26 21:32:41,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:32:41,967 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 67 states. [2018-09-26 21:32:42,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:42,082 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2018-09-26 21:32:42,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:32:42,082 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 197 [2018-09-26 21:32:42,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:42,083 INFO L225 Difference]: With dead ends: 204 [2018-09-26 21:32:42,083 INFO L226 Difference]: Without dead ends: 200 [2018-09-26 21:32:42,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:32:42,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-09-26 21:32:42,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-09-26 21:32:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-26 21:32:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-09-26 21:32:42,088 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 197 [2018-09-26 21:32:42,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:42,089 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-09-26 21:32:42,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-26 21:32:42,089 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-09-26 21:32:42,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-26 21:32:42,089 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:42,090 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1] [2018-09-26 21:32:42,090 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:42,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:42,090 INFO L82 PathProgramCache]: Analyzing trace with hash -775070265, now seen corresponding path program 42 times [2018-09-26 21:32:42,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:42,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:42,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:42,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:42,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:43,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:43,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:43,744 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:43,867 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2018-09-26 21:32:43,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:43,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:43,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:43,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-26 21:32:43,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:32:43,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:32:43,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:32:43,927 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 68 states. [2018-09-26 21:32:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:44,123 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2018-09-26 21:32:44,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:32:44,123 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 197 [2018-09-26 21:32:44,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:44,124 INFO L225 Difference]: With dead ends: 206 [2018-09-26 21:32:44,124 INFO L226 Difference]: Without dead ends: 202 [2018-09-26 21:32:44,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:32:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-09-26 21:32:44,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-09-26 21:32:44,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-09-26 21:32:44,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2018-09-26 21:32:44,128 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 197 [2018-09-26 21:32:44,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:44,128 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2018-09-26 21:32:44,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:32:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2018-09-26 21:32:44,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-26 21:32:44,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:44,129 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1] [2018-09-26 21:32:44,129 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:44,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:44,129 INFO L82 PathProgramCache]: Analyzing trace with hash -374489323, now seen corresponding path program 65 times [2018-09-26 21:32:44,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:44,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:44,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:44,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:44,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:45,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:45,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:45,969 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:46,098 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-26 21:32:46,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:46,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:46,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:46,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:32:46,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:32:46,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:32:46,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:32:46,180 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand 68 states. [2018-09-26 21:32:46,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:46,374 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2018-09-26 21:32:46,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:32:46,375 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 200 [2018-09-26 21:32:46,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:46,376 INFO L225 Difference]: With dead ends: 207 [2018-09-26 21:32:46,376 INFO L226 Difference]: Without dead ends: 203 [2018-09-26 21:32:46,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:32:46,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-26 21:32:46,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-26 21:32:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-26 21:32:46,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-09-26 21:32:46,379 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-09-26 21:32:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:46,379 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-09-26 21:32:46,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:32:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-09-26 21:32:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-26 21:32:46,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:46,380 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1] [2018-09-26 21:32:46,380 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:46,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash -374489261, now seen corresponding path program 43 times [2018-09-26 21:32:46,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:46,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:46,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:46,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:46,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:48,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:48,020 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 [2018-09-26 21:32:48,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:48,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:48,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:48,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:32:48,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-26 21:32:48,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-26 21:32:48,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:32:48,164 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 69 states. [2018-09-26 21:32:48,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:48,322 INFO L93 Difference]: Finished difference Result 209 states and 215 transitions. [2018-09-26 21:32:48,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:32:48,322 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 200 [2018-09-26 21:32:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:48,323 INFO L225 Difference]: With dead ends: 209 [2018-09-26 21:32:48,323 INFO L226 Difference]: Without dead ends: 205 [2018-09-26 21:32:48,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:32:48,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-26 21:32:48,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-26 21:32:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-26 21:32:48,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-26 21:32:48,327 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 200 [2018-09-26 21:32:48,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:48,328 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-26 21:32:48,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-26 21:32:48,328 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-26 21:32:48,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-26 21:32:48,328 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:48,328 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1] [2018-09-26 21:32:48,329 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:48,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:48,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1915052553, now seen corresponding path program 66 times [2018-09-26 21:32:48,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:48,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:48,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:48,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:48,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 67 proven. 6633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:50,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:50,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:50,191 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:50,320 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-09-26 21:32:50,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:50,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 6700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:53,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:53,647 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-26 21:32:53,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-26 21:32:53,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-26 21:32:53,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4760, Invalid=13872, Unknown=0, NotChecked=0, Total=18632 [2018-09-26 21:32:53,648 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 137 states. [2018-09-26 21:33:02,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:02,259 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2018-09-26 21:33:02,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-26 21:33:02,260 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 203 [2018-09-26 21:33:02,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:02,260 INFO L225 Difference]: With dead ends: 212 [2018-09-26 21:33:02,260 INFO L226 Difference]: Without dead ends: 208 [2018-09-26 21:33:02,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13399 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=23118, Invalid=50052, Unknown=0, NotChecked=0, Total=73170 [2018-09-26 21:33:02,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-09-26 21:33:02,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-09-26 21:33:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-26 21:33:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2018-09-26 21:33:02,266 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 203 [2018-09-26 21:33:02,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:02,267 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2018-09-26 21:33:02,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-26 21:33:02,267 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2018-09-26 21:33:02,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-26 21:33:02,268 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:02,268 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1] [2018-09-26 21:33:02,268 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:02,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:02,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452693, now seen corresponding path program 67 times [2018-09-26 21:33:02,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:02,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:02,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:02,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:02,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:04,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:04,025 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 [2018-09-26 21:33:04,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:04,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:04,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:04,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:33:04,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:33:04,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:33:04,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:33:04,150 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand 70 states. [2018-09-26 21:33:04,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:04,276 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2018-09-26 21:33:04,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:33:04,276 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 206 [2018-09-26 21:33:04,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:04,277 INFO L225 Difference]: With dead ends: 213 [2018-09-26 21:33:04,277 INFO L226 Difference]: Without dead ends: 209 [2018-09-26 21:33:04,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:33:04,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-26 21:33:04,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-26 21:33:04,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-26 21:33:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-09-26 21:33:04,282 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-09-26 21:33:04,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:04,282 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-09-26 21:33:04,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:33:04,282 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-09-26 21:33:04,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-26 21:33:04,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:04,283 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1] [2018-09-26 21:33:04,283 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:04,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:04,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452755, now seen corresponding path program 44 times [2018-09-26 21:33:04,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:04,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:04,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:04,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:04,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:06,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:06,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:33:06,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:06,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:06,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:06,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:06,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:06,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:33:06,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:33:06,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:33:06,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:33:06,553 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 71 states. [2018-09-26 21:33:06,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:06,762 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2018-09-26 21:33:06,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:33:06,762 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 206 [2018-09-26 21:33:06,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:06,763 INFO L225 Difference]: With dead ends: 215 [2018-09-26 21:33:06,763 INFO L226 Difference]: Without dead ends: 211 [2018-09-26 21:33:06,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:33:06,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-26 21:33:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-26 21:33:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-26 21:33:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-26 21:33:06,768 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 206 [2018-09-26 21:33:06,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:06,768 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-26 21:33:06,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:33:06,768 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-26 21:33:06,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-26 21:33:06,769 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:06,769 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1] [2018-09-26 21:33:06,769 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:06,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:06,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289353, now seen corresponding path program 68 times [2018-09-26 21:33:06,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:06,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:06,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:06,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:06,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:08,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:08,526 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 [2018-09-26 21:33:08,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:08,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:08,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:08,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:08,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:08,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-26 21:33:08,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:33:08,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:33:08,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:33:08,703 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 71 states. [2018-09-26 21:33:08,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:08,927 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2018-09-26 21:33:08,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:33:08,928 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 209 [2018-09-26 21:33:08,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:08,929 INFO L225 Difference]: With dead ends: 216 [2018-09-26 21:33:08,929 INFO L226 Difference]: Without dead ends: 212 [2018-09-26 21:33:08,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:33:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-09-26 21:33:08,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-09-26 21:33:08,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-09-26 21:33:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2018-09-26 21:33:08,933 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 209 [2018-09-26 21:33:08,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:08,933 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2018-09-26 21:33:08,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:33:08,934 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2018-09-26 21:33:08,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-26 21:33:08,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:08,934 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1] [2018-09-26 21:33:08,934 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:08,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:08,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289415, now seen corresponding path program 45 times [2018-09-26 21:33:08,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:08,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:08,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:08,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:08,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:11,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:11,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:33:11,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:11,208 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-26 21:33:11,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:11,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:11,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:11,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-26 21:33:11,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:33:11,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:33:11,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:33:11,271 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand 72 states. [2018-09-26 21:33:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:11,530 INFO L93 Difference]: Finished difference Result 218 states and 224 transitions. [2018-09-26 21:33:11,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:33:11,531 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 209 [2018-09-26 21:33:11,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:11,532 INFO L225 Difference]: With dead ends: 218 [2018-09-26 21:33:11,532 INFO L226 Difference]: Without dead ends: 214 [2018-09-26 21:33:11,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:33:11,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-09-26 21:33:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-09-26 21:33:11,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-09-26 21:33:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2018-09-26 21:33:11,535 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 209 [2018-09-26 21:33:11,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:11,535 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2018-09-26 21:33:11,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:33:11,535 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2018-09-26 21:33:11,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-26 21:33:11,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:11,536 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1] [2018-09-26 21:33:11,536 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:11,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:11,536 INFO L82 PathProgramCache]: Analyzing trace with hash -645499371, now seen corresponding path program 69 times [2018-09-26 21:33:11,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:11,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:11,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:11,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:11,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 70 proven. 7245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:13,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:13,328 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 [2018-09-26 21:33:13,335 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:13,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-09-26 21:33:13,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:13,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-26 21:33:16,213 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-26 21:33:16,414 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:16,414 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:33:16,420 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:33:16,421 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:33:16 BoogieIcfgContainer [2018-09-26 21:33:16,421 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:33:16,421 INFO L168 Benchmark]: Toolchain (without parser) took 235354.44 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 345.5 MB). Free memory was 1.5 GB in the beginning and 883.8 MB in the end (delta: 567.7 MB). Peak memory consumption was 913.3 MB. Max. memory is 7.1 GB. [2018-09-26 21:33:16,423 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:33:16,423 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.68 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:33:16,423 INFO L168 Benchmark]: Boogie Preprocessor took 21.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:33:16,424 INFO L168 Benchmark]: RCFGBuilder took 245.83 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:33:16,424 INFO L168 Benchmark]: TraceAbstraction took 235037.72 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 345.5 MB). Free memory was 1.4 GB in the beginning and 883.8 MB in the end (delta: 546.6 MB). Peak memory consumption was 892.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:33:16,426 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.68 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 245.83 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235037.72 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 345.5 MB). Free memory was 1.4 GB in the beginning and 883.8 MB in the end (delta: 546.6 MB). Peak memory consumption was 892.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 30). Cancelled while BasicCegarLoop was analyzing trace of length 213 with TraceHistMax 70, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 125 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 234.9s OverallTime, 116 OverallIterations, 70 TraceHistogramMax, 90.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 667 SDtfs, 2487 SDslu, 11223 SDs, 0 SdLazy, 12781 SolverSat, 1111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17913 GetRequests, 11381 SyntacticMatches, 0 SemanticMatches, 6532 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108474 ImplicationChecksByTransitivity, 191.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 115 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 7.4s SatisfiabilityAnalysisTime, 125.1s InterpolantComputationTime, 24537 NumberOfCodeBlocks, 24537 NumberOfCodeBlocksAsserted, 2247 NumberOfCheckSat, 24309 ConstructedInterpolants, 0 QuantifiedInterpolants, 10237847 SizeOfPredicates, 0 NumberOfNonLiveVariables, 29108 ConjunctsInSsa, 4195 ConjunctsInUnsatCore, 228 InterpolantComputations, 2 PerfectInterpolantSequences, 4013/558041 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-33-16-434.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-33-16-434.csv Completed graceful shutdown