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/Luxembourg-sophisticated.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:26:44,880 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:26:44,882 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:26:44,903 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:26:44,903 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:26:44,904 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:26:44,906 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:26:44,908 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:26:44,910 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:26:44,912 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:26:44,915 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 09:26:44,960 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-04 09:26:44,985 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:26:44,985 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:26:44,986 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:26:44,986 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:26:44,987 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:26:44,988 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:26:44,988 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:26:44,988 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:26:44,988 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:26:44,988 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:26:44,989 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:26:44,989 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:26:44,989 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:26:44,989 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:26:44,989 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:26:44,990 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:26:44,991 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:26:44,991 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:26:44,991 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:26:44,991 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:26:44,992 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:26:44,992 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:26:44,992 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:26:44,992 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:26:44,993 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:26:44,993 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:26:44,993 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:26:44,993 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:26:44,993 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:26:44,994 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:26:45,045 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:26:45,059 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:26:45,064 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:26:45,066 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:26:45,067 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:26:45,068 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl [2018-10-04 09:26:45,068 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl' [2018-10-04 09:26:45,120 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:26:45,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:26:45,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:26:45,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:26:45,124 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:26:45,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:26:45" (1/1) ... [2018-10-04 09:26:45,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:26:45" (1/1) ... [2018-10-04 09:26:45,162 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 09:26:45,162 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 09:26:45,162 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 09:26:45,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:26:45,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:26:45,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:26:45,165 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:26:45,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:26:45" (1/1) ... [2018-10-04 09:26:45,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:26:45" (1/1) ... [2018-10-04 09:26:45,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:26:45" (1/1) ... [2018-10-04 09:26:45,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:26:45" (1/1) ... [2018-10-04 09:26:45,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:26:45" (1/1) ... [2018-10-04 09:26:45,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:26:45" (1/1) ... [2018-10-04 09:26:45,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:26:45" (1/1) ... [2018-10-04 09:26:45,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:26:45,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:26:45,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:26:45,188 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:26:45,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:26:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:26:45,255 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-04 09:26:45,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 09:26:45,255 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 09:26:45,422 INFO L338 CfgBuilder]: Using library mode [2018-10-04 09:26:45,423 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:26:45 BoogieIcfgContainer [2018-10-04 09:26:45,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:26:45,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:26:45,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:26:45,428 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:26:45,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:26:45" (1/2) ... [2018-10-04 09:26:45,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f09f57a and model type Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:26:45, skipping insertion in model container [2018-10-04 09:26:45,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:26:45" (2/2) ... [2018-10-04 09:26:45,432 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-sophisticated.bpl [2018-10-04 09:26:45,442 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:26:45,454 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:26:45,503 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:26:45,504 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:26:45,505 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:26:45,505 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:26:45,505 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:26:45,505 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:26:45,505 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:26:45,506 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:26:45,506 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:26:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 09:26:45,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 09:26:45,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:45,527 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 09:26:45,528 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:45,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:45,535 INFO L82 PathProgramCache]: Analyzing trace with hash 30240, now seen corresponding path program 1 times [2018-10-04 09:26:45,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:45,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:45,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:45,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:45,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:45,660 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:26:45,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 09:26:45,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:26:45,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:26:45,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:26:45,679 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 09:26:45,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:45,753 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2018-10-04 09:26:45,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:26:45,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-04 09:26:45,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:45,769 INFO L225 Difference]: With dead ends: 15 [2018-10-04 09:26:45,769 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 09:26:45,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:26:45,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 09:26:45,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-10-04 09:26:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 09:26:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-10-04 09:26:45,828 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-10-04 09:26:45,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:45,829 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-10-04 09:26:45,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:26:45,829 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-10-04 09:26:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 09:26:45,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:45,830 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-04 09:26:45,830 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:45,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:45,831 INFO L82 PathProgramCache]: Analyzing trace with hash 28755491, now seen corresponding path program 1 times [2018-10-04 09:26:45,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:45,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:45,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:45,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:45,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:45,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:45,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:45,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:45,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:46,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:46,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 09:26:46,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:26:46,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:26:46,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:26:46,028 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2018-10-04 09:26:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:46,097 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-10-04 09:26:46,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:26:46,097 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-10-04 09:26:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:46,098 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:26:46,098 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 09:26:46,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:26:46,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 09:26:46,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-10-04 09:26:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 09:26:46,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-04 09:26:46,103 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-10-04 09:26:46,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:46,103 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-04 09:26:46,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:26:46,103 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-04 09:26:46,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 09:26:46,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:46,104 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-04 09:26:46,104 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:46,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:46,105 INFO L82 PathProgramCache]: Analyzing trace with hash 28757413, now seen corresponding path program 1 times [2018-10-04 09:26:46,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:46,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:46,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:46,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:46,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:46,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:46,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:46,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:46,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:46,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:46,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 09:26:46,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:26:46,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:26:46,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:26:46,193 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-10-04 09:26:46,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:46,229 INFO L93 Difference]: Finished difference Result 12 states and 15 transitions. [2018-10-04 09:26:46,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:26:46,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-10-04 09:26:46,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:46,231 INFO L225 Difference]: With dead ends: 12 [2018-10-04 09:26:46,231 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 09:26:46,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:26:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 09:26:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-10-04 09:26:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 09:26:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-04 09:26:46,235 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-10-04 09:26:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:46,235 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-04 09:26:46,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:26:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-04 09:26:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:26:46,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:46,236 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-10-04 09:26:46,236 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:46,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:46,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1863917926, now seen corresponding path program 2 times [2018-10-04 09:26:46,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:46,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:46,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:46,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:46,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:46,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:46,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:46,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:46,323 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:46,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:46,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:46,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:46,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:26:46,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:26:46,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:26:46,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:26:46,351 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 5 states. [2018-10-04 09:26:46,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:46,430 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-10-04 09:26:46,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:26:46,431 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-10-04 09:26:46,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:46,432 INFO L225 Difference]: With dead ends: 14 [2018-10-04 09:26:46,432 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 09:26:46,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:26:46,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 09:26:46,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-10-04 09:26:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 09:26:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-10-04 09:26:46,440 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-10-04 09:26:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:46,441 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-10-04 09:26:46,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:26:46,441 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-10-04 09:26:46,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:26:46,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:46,442 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-10-04 09:26:46,442 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:46,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:46,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1863919848, now seen corresponding path program 1 times [2018-10-04 09:26:46,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:46,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:46,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:46,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:46,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:46,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:46,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:46,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:46,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:46,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:46,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:26:46,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:26:46,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:26:46,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:26:46,592 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-10-04 09:26:46,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:46,772 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-10-04 09:26:46,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:26:46,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-10-04 09:26:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:46,773 INFO L225 Difference]: With dead ends: 14 [2018-10-04 09:26:46,773 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 09:26:46,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:26:46,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 09:26:46,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-10-04 09:26:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 09:26:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-10-04 09:26:46,778 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-10-04 09:26:46,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:46,779 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-10-04 09:26:46,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:26:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-10-04 09:26:46,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:26:46,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:46,780 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-10-04 09:26:46,780 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:46,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:46,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1865764968, now seen corresponding path program 2 times [2018-10-04 09:26:46,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:46,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:46,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:46,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:46,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:46,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:46,852 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) [2018-10-04 09:26:46,871 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:46,894 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:46,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:46,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:46,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:46,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:26:46,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:26:46,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:26:46,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:26:46,924 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-10-04 09:26:46,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:46,995 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-10-04 09:26:46,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:26:46,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-10-04 09:26:46,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:47,000 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:26:47,000 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 09:26:47,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:26:47,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 09:26:47,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2018-10-04 09:26:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 09:26:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-10-04 09:26:47,009 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2018-10-04 09:26:47,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:47,009 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-10-04 09:26:47,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:26:47,010 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-10-04 09:26:47,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:26:47,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:47,010 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-10-04 09:26:47,012 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:47,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:47,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1865766890, now seen corresponding path program 2 times [2018-10-04 09:26:47,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:47,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:47,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:47,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:47,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:47,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:47,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:47,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:47,084 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:47,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:47,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:47,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:47,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:26:47,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:26:47,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:26:47,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:26:47,112 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 5 states. [2018-10-04 09:26:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:47,159 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2018-10-04 09:26:47,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:26:47,161 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-10-04 09:26:47,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:47,162 INFO L225 Difference]: With dead ends: 16 [2018-10-04 09:26:47,162 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 09:26:47,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:26:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 09:26:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2018-10-04 09:26:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 09:26:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-10-04 09:26:47,167 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-10-04 09:26:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:47,168 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-10-04 09:26:47,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:26:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-10-04 09:26:47,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:26:47,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:47,169 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-10-04 09:26:47,169 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:47,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:47,170 INFO L82 PathProgramCache]: Analyzing trace with hash 223459305, now seen corresponding path program 3 times [2018-10-04 09:26:47,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:47,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:47,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:47,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:47,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:47,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:47,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:47,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:47,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 09:26:47,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:47,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:47,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:47,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:26:47,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:26:47,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:26:47,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:26:47,383 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 6 states. [2018-10-04 09:26:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:47,447 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-10-04 09:26:47,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:26:47,447 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-04 09:26:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:47,448 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:26:47,448 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 09:26:47,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:26:47,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 09:26:47,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-04 09:26:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:26:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-04 09:26:47,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-10-04 09:26:47,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:47,455 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-04 09:26:47,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:26:47,455 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-04 09:26:47,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:26:47,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:47,456 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-04 09:26:47,456 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:47,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:47,457 INFO L82 PathProgramCache]: Analyzing trace with hash 223461227, now seen corresponding path program 3 times [2018-10-04 09:26:47,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:47,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:47,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:47,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:47,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:47,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:47,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:47,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:47,517 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 09:26:47,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:47,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:47,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:47,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:26:47,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:26:47,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:26:47,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:26:47,547 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-10-04 09:26:47,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:47,605 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-10-04 09:26:47,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:26:47,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-04 09:26:47,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:47,606 INFO L225 Difference]: With dead ends: 18 [2018-10-04 09:26:47,606 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 09:26:47,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:26:47,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 09:26:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-10-04 09:26:47,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 09:26:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-10-04 09:26:47,611 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-10-04 09:26:47,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:47,611 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-10-04 09:26:47,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:26:47,611 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-10-04 09:26:47,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:26:47,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:47,612 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-04 09:26:47,612 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:47,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:47,613 INFO L82 PathProgramCache]: Analyzing trace with hash 225306347, now seen corresponding path program 4 times [2018-10-04 09:26:47,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:47,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:47,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:47,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:47,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:47,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:47,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:47,674 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:47,680 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:47,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:47,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:47,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:47,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:26:47,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:26:47,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:26:47,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:26:47,708 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-10-04 09:26:47,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:47,746 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-10-04 09:26:47,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:26:47,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-04 09:26:47,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:47,747 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:26:47,748 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 09:26:47,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:26:47,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 09:26:47,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-04 09:26:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:26:47,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-04 09:26:47,753 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-10-04 09:26:47,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:47,754 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-04 09:26:47,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:26:47,754 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-04 09:26:47,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:26:47,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:47,755 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-04 09:26:47,755 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:47,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:47,755 INFO L82 PathProgramCache]: Analyzing trace with hash 225308269, now seen corresponding path program 5 times [2018-10-04 09:26:47,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:47,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:47,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:47,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:47,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:47,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:47,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:47,920 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:47,975 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 09:26:47,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:47,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:48,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:48,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:26:48,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:26:48,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:26:48,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:26:48,024 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-10-04 09:26:48,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:48,212 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-10-04 09:26:48,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:26:48,214 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-04 09:26:48,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:48,214 INFO L225 Difference]: With dead ends: 18 [2018-10-04 09:26:48,215 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 09:26:48,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:26:48,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 09:26:48,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-10-04 09:26:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 09:26:48,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-10-04 09:26:48,219 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-10-04 09:26:48,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:48,220 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-10-04 09:26:48,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:26:48,220 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-10-04 09:26:48,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:26:48,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:48,221 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-04 09:26:48,221 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:48,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:48,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1998466667, now seen corresponding path program 6 times [2018-10-04 09:26:48,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:48,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:48,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:48,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:48,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:48,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:48,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:48,279 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:48,295 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 09:26:48,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:48,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:48,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:48,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:26:48,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:26:48,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:26:48,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:26:48,324 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-10-04 09:26:48,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:48,351 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-10-04 09:26:48,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:26:48,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-04 09:26:48,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:48,353 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:26:48,353 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 09:26:48,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:26:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 09:26:48,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2018-10-04 09:26:48,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:26:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-04 09:26:48,360 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-10-04 09:26:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:48,360 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-04 09:26:48,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:26:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-04 09:26:48,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:26:48,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:48,361 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-04 09:26:48,362 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:48,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:48,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1998468589, now seen corresponding path program 7 times [2018-10-04 09:26:48,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:48,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:48,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:48,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:48,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:48,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:48,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:48,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:48,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:48,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:48,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:26:48,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:26:48,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:26:48,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:26:48,469 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-10-04 09:26:48,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:48,507 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-10-04 09:26:48,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:26:48,508 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-04 09:26:48,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:48,509 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:26:48,509 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 09:26:48,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:26:48,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 09:26:48,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2018-10-04 09:26:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:26:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-04 09:26:48,515 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-10-04 09:26:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:48,515 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-04 09:26:48,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:26:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-04 09:26:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:26:48,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:48,516 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-04 09:26:48,516 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:48,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:48,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2000313709, now seen corresponding path program 8 times [2018-10-04 09:26:48,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:48,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:48,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:48,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:48,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:48,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:48,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:48,592 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:48,598 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:48,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:48,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:48,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:48,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:26:48,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:26:48,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:26:48,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:26:48,624 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-10-04 09:26:48,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:48,675 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2018-10-04 09:26:48,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:26:48,679 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-04 09:26:48,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:48,679 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:26:48,680 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 09:26:48,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:26:48,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 09:26:48,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2018-10-04 09:26:48,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:26:48,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-04 09:26:48,685 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-10-04 09:26:48,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:48,686 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-04 09:26:48,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:26:48,686 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-04 09:26:48,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:26:48,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:48,687 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-10-04 09:26:48,687 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:48,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:48,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2000315631, now seen corresponding path program 3 times [2018-10-04 09:26:48,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:48,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:48,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:48,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:48,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:48,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:48,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:48,741 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:48,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 09:26:48,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:48,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:48,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:48,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:48,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:26:48,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:26:48,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:26:48,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:26:48,776 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-10-04 09:26:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:48,830 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2018-10-04 09:26:48,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:26:48,832 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-04 09:26:48,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:48,832 INFO L225 Difference]: With dead ends: 20 [2018-10-04 09:26:48,832 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 09:26:48,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:26:48,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 09:26:48,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2018-10-04 09:26:48,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 09:26:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-10-04 09:26:48,838 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-10-04 09:26:48,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:48,838 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-10-04 09:26:48,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:26:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-10-04 09:26:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:26:48,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:48,839 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-10-04 09:26:48,840 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:48,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:48,840 INFO L82 PathProgramCache]: Analyzing trace with hash -4277844, now seen corresponding path program 4 times [2018-10-04 09:26:48,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:48,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:48,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:48,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:48,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:48,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:48,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:48,977 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:48,998 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:48,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:48,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:49,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:49,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:26:49,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:26:49,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:26:49,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:49,034 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 7 states. [2018-10-04 09:26:49,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:49,254 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-04 09:26:49,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:26:49,255 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-04 09:26:49,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:49,255 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:26:49,255 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:26:49,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:49,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:26:49,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-10-04 09:26:49,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:26:49,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-04 09:26:49,264 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-04 09:26:49,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:49,264 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-04 09:26:49,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:26:49,265 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-04 09:26:49,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:26:49,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:49,265 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-04 09:26:49,266 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:49,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:49,266 INFO L82 PathProgramCache]: Analyzing trace with hash -4275922, now seen corresponding path program 9 times [2018-10-04 09:26:49,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:49,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:49,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:49,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:49,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:49,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:49,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:49,346 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:49,353 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-04 09:26:49,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:49,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:49,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:49,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:26:49,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:26:49,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:26:49,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:49,382 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-04 09:26:49,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:49,413 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-04 09:26:49,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:26:49,414 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-04 09:26:49,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:49,415 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:26:49,415 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:26:49,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:26:49,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-10-04 09:26:49,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:26:49,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-04 09:26:49,422 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-10-04 09:26:49,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:49,423 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-04 09:26:49,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:26:49,423 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-04 09:26:49,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:26:49,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:49,424 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-04 09:26:49,424 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:49,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:49,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2430802, now seen corresponding path program 10 times [2018-10-04 09:26:49,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:49,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:49,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:49,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:49,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:49,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:49,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:49,505 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:49,524 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:49,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:49,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:49,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:49,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:26:49,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:26:49,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:26:49,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:49,555 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-10-04 09:26:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:49,622 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-10-04 09:26:49,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:26:49,622 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-04 09:26:49,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:49,623 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:26:49,623 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 09:26:49,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:49,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 09:26:49,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-10-04 09:26:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:26:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-04 09:26:49,631 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-04 09:26:49,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:49,632 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-04 09:26:49,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:26:49,632 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-04 09:26:49,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:26:49,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:49,633 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-04 09:26:49,633 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:49,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:49,633 INFO L82 PathProgramCache]: Analyzing trace with hash -2428880, now seen corresponding path program 11 times [2018-10-04 09:26:49,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:49,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:49,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:49,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:49,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:49,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:49,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:49,754 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:49,760 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-04 09:26:49,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:49,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:49,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:49,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:26:49,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:26:49,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:26:49,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:49,798 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-04 09:26:50,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:50,027 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-10-04 09:26:50,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:26:50,028 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-04 09:26:50,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:50,029 INFO L225 Difference]: With dead ends: 22 [2018-10-04 09:26:50,029 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 09:26:50,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:50,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 09:26:50,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-10-04 09:26:50,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:26:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-04 09:26:50,036 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-10-04 09:26:50,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:50,037 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-04 09:26:50,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:26:50,038 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-04 09:26:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:26:50,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:50,038 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-04 09:26:50,039 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:50,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:50,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1770729518, now seen corresponding path program 12 times [2018-10-04 09:26:50,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:50,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:50,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:50,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:50,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:50,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:50,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:50,210 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:50,218 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 09:26:50,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:50,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:50,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:50,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:26:50,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:26:50,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:26:50,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:50,244 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-10-04 09:26:50,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:50,324 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-04 09:26:50,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:26:50,324 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-04 09:26:50,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:50,324 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:26:50,325 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:26:50,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:50,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:26:50,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-10-04 09:26:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:26:50,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-04 09:26:50,333 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-04 09:26:50,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:50,333 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-04 09:26:50,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:26:50,333 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-04 09:26:50,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:26:50,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:50,334 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-04 09:26:50,334 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:50,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:50,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1770731440, now seen corresponding path program 13 times [2018-10-04 09:26:50,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:50,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:50,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:50,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:50,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:50,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:50,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:50,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:50,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:50,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:50,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:26:50,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:26:50,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:26:50,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:50,449 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-04 09:26:50,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:50,626 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-04 09:26:50,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:26:50,626 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-04 09:26:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:50,626 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:26:50,626 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:26:50,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:50,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:26:50,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-10-04 09:26:50,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:26:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-04 09:26:50,635 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-10-04 09:26:50,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:50,636 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-04 09:26:50,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:26:50,636 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-04 09:26:50,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:26:50,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:50,636 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-04 09:26:50,637 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:50,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:50,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1772576560, now seen corresponding path program 14 times [2018-10-04 09:26:50,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:50,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:50,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:50,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:50,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:50,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:50,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:50,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:50,781 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:50,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:50,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:50,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:50,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:26:50,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:26:50,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:26:50,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:50,808 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-10-04 09:26:50,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:50,864 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-10-04 09:26:50,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:26:50,866 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-04 09:26:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:50,867 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:26:50,867 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 09:26:50,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:50,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 09:26:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-10-04 09:26:50,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:26:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-04 09:26:50,875 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-04 09:26:50,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:50,876 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-04 09:26:50,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:26:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-04 09:26:50,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:26:50,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:50,877 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-04 09:26:50,877 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:50,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:50,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578482, now seen corresponding path program 15 times [2018-10-04 09:26:50,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:50,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:50,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:50,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:50,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:50,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:50,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:50,932 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:50,938 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-04 09:26:50,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:50,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:50,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:50,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:26:50,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:26:50,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:26:50,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:50,974 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-04 09:26:51,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:51,243 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-10-04 09:26:51,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:26:51,244 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-04 09:26:51,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:51,245 INFO L225 Difference]: With dead ends: 22 [2018-10-04 09:26:51,245 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 09:26:51,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:51,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 09:26:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-10-04 09:26:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:26:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-04 09:26:51,252 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-10-04 09:26:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:51,252 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-04 09:26:51,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:26:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-04 09:26:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:26:51,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:51,253 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-04 09:26:51,253 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:51,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:51,254 INFO L82 PathProgramCache]: Analyzing trace with hash 675780526, now seen corresponding path program 16 times [2018-10-04 09:26:51,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:51,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:51,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:51,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:51,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:51,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:51,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:51,617 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:51,623 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:51,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:51,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:51,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:51,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:26:51,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:26:51,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:26:51,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:51,648 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-10-04 09:26:51,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:51,684 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-04 09:26:51,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:26:51,684 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-04 09:26:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:51,685 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:26:51,685 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:26:51,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:51,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:26:51,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-10-04 09:26:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:26:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-04 09:26:51,695 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-10-04 09:26:51,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:51,695 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-04 09:26:51,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:26:51,695 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-04 09:26:51,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:26:51,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:51,696 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-04 09:26:51,696 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:51,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:51,696 INFO L82 PathProgramCache]: Analyzing trace with hash 675782448, now seen corresponding path program 17 times [2018-10-04 09:26:51,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:51,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:51,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:51,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:51,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:51,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:51,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:51,776 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:51,804 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-04 09:26:51,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:51,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:51,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:51,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:26:51,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:26:51,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:26:51,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:51,830 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-10-04 09:26:51,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:51,983 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-04 09:26:51,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:26:51,984 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-04 09:26:51,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:51,984 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:26:51,984 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:26:51,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:51,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:26:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2018-10-04 09:26:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:26:51,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-04 09:26:51,994 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-04 09:26:51,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:51,995 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-04 09:26:51,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:26:51,995 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-04 09:26:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:26:51,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:51,995 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-04 09:26:51,996 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:51,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:51,996 INFO L82 PathProgramCache]: Analyzing trace with hash 677627568, now seen corresponding path program 18 times [2018-10-04 09:26:51,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:51,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:51,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:51,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:51,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:52,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:52,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:52,076 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:52,089 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 09:26:52,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:52,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:52,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:52,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:26:52,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:26:52,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:26:52,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:52,123 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-04 09:26:52,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:52,165 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-04 09:26:52,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:26:52,166 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-04 09:26:52,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:52,166 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:26:52,166 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:26:52,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:52,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:26:52,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-10-04 09:26:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:26:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-04 09:26:52,175 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-10-04 09:26:52,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:52,175 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-04 09:26:52,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:26:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-04 09:26:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:26:52,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:52,176 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-04 09:26:52,176 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:52,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:52,177 INFO L82 PathProgramCache]: Analyzing trace with hash 677629490, now seen corresponding path program 19 times [2018-10-04 09:26:52,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:52,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:52,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:52,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:52,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:52,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:52,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:52,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:52,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:52,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:52,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:26:52,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:26:52,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:26:52,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:52,276 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-10-04 09:26:52,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:52,334 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-04 09:26:52,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:26:52,335 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-04 09:26:52,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:52,335 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:26:52,335 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:26:52,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:52,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:26:52,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2018-10-04 09:26:52,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:26:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-04 09:26:52,341 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-10-04 09:26:52,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:52,341 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-04 09:26:52,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:26:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-04 09:26:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:26:52,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:52,342 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-04 09:26:52,342 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:52,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:52,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1844179408, now seen corresponding path program 20 times [2018-10-04 09:26:52,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:52,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:52,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:52,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:52,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:52,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:52,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:52,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:52,434 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:52,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:52,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:52,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:52,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:26:52,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:26:52,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:26:52,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:52,467 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-10-04 09:26:52,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:52,502 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-10-04 09:26:52,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:26:52,502 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-04 09:26:52,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:52,503 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:26:52,503 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 09:26:52,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 09:26:52,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-10-04 09:26:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:26:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-04 09:26:52,514 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-10-04 09:26:52,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:52,514 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-04 09:26:52,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:26:52,514 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-04 09:26:52,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:26:52,515 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:52,515 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-04 09:26:52,515 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:52,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:52,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1844177486, now seen corresponding path program 21 times [2018-10-04 09:26:52,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:52,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:52,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:52,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:52,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:52,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:52,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:52,583 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:52,589 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-04 09:26:52,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:52,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:52,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:52,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:26:52,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:26:52,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:26:52,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:52,617 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-10-04 09:26:52,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:52,734 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-10-04 09:26:52,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:26:52,735 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-04 09:26:52,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:52,735 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:26:52,735 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 09:26:52,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:52,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 09:26:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2018-10-04 09:26:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:26:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-04 09:26:52,744 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-04 09:26:52,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:52,745 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-04 09:26:52,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:26:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-04 09:26:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:26:52,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:52,745 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-04 09:26:52,746 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:52,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:52,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1842332366, now seen corresponding path program 22 times [2018-10-04 09:26:52,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:52,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:52,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:52,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:52,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:52,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:52,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:52,819 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:52,825 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:52,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:52,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:52,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:52,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:26:52,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:26:52,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:26:52,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:52,853 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-04 09:26:52,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:52,890 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-04 09:26:52,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:26:52,890 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-04 09:26:52,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:52,891 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:26:52,891 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:26:52,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:52,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:26:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-10-04 09:26:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:26:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-04 09:26:52,900 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-10-04 09:26:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:52,900 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-04 09:26:52,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:26:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-04 09:26:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:26:52,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:52,901 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-10-04 09:26:52,902 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:52,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:52,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1842330444, now seen corresponding path program 4 times [2018-10-04 09:26:52,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:52,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:52,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:52,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:52,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:52,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:52,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:52,971 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:52,999 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:52,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:53,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:53,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:53,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:26:53,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:26:53,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:26:53,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:53,026 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-10-04 09:26:53,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:53,068 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2018-10-04 09:26:53,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:26:53,068 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-04 09:26:53,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:53,069 INFO L225 Difference]: With dead ends: 24 [2018-10-04 09:26:53,069 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 09:26:53,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:26:53,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 09:26:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2018-10-04 09:26:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:26:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-04 09:26:53,075 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-10-04 09:26:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:53,075 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-04 09:26:53,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:26:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-04 09:26:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:53,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:53,076 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-10-04 09:26:53,076 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:53,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:53,076 INFO L82 PathProgramCache]: Analyzing trace with hash 183654063, now seen corresponding path program 5 times [2018-10-04 09:26:53,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:53,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:53,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:53,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:53,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:53,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:53,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:53,148 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:53,223 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:26:53,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:53,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:53,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:53,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:53,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:53,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:53,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:53,264 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 8 states. [2018-10-04 09:26:53,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:53,455 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-04 09:26:53,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:53,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:53,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:53,456 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:26:53,456 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:26:53,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:53,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:26:53,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-04 09:26:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:26:53,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:26:53,467 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-04 09:26:53,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:53,468 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:26:53,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:53,468 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:26:53,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:53,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:53,468 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-04 09:26:53,468 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:53,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:53,469 INFO L82 PathProgramCache]: Analyzing trace with hash 183655985, now seen corresponding path program 23 times [2018-10-04 09:26:53,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:53,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:53,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:53,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:53,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:53,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:53,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:53,533 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:53,540 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:26:53,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:53,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:53,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:53,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:53,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:53,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:53,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:53,567 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-04 09:26:53,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:53,617 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-04 09:26:53,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:53,617 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:53,618 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:26:53,618 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:26:53,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:53,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:26:53,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-10-04 09:26:53,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:26:53,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-04 09:26:53,633 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-04 09:26:53,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:53,633 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-04 09:26:53,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:53,633 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-04 09:26:53,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:53,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:53,634 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-04 09:26:53,634 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:53,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:53,634 INFO L82 PathProgramCache]: Analyzing trace with hash 185501105, now seen corresponding path program 24 times [2018-10-04 09:26:53,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:53,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:53,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:53,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:53,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:53,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:53,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:53,717 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:53,732 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-04 09:26:53,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:53,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:53,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:53,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:53,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:53,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:53,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:53,762 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-04 09:26:53,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:53,817 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-04 09:26:53,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:53,817 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:53,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:53,818 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:26:53,818 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:26:53,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:53,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:26:53,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-04 09:26:53,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:26:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:26:53,830 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-04 09:26:53,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:53,830 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:26:53,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:26:53,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:53,831 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:53,831 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:53,831 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:53,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:53,832 INFO L82 PathProgramCache]: Analyzing trace with hash 185503027, now seen corresponding path program 25 times [2018-10-04 09:26:53,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:53,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:53,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:53,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:53,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:53,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:53,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:53,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:53,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:53,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:53,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:53,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:53,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:53,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:53,955 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-04 09:26:54,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:54,063 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-04 09:26:54,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:54,064 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:54,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:54,064 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:26:54,064 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:26:54,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:54,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:26:54,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-10-04 09:26:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:26:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-04 09:26:54,073 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-10-04 09:26:54,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:54,073 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-04 09:26:54,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-04 09:26:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:54,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:54,074 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-04 09:26:54,074 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:54,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:54,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1958661425, now seen corresponding path program 26 times [2018-10-04 09:26:54,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:54,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:54,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:54,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:54,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:54,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:54,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:54,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:54,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:54,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:54,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:54,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:54,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:54,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:54,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:54,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:54,282 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-10-04 09:26:54,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:54,337 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-04 09:26:54,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:54,337 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:54,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:54,338 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:26:54,338 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:26:54,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:54,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:26:54,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-10-04 09:26:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:26:54,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:26:54,350 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-04 09:26:54,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:54,350 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:26:54,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:54,350 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:26:54,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:54,351 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:54,351 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:54,351 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:54,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:54,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1958663347, now seen corresponding path program 27 times [2018-10-04 09:26:54,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:54,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:54,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:54,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:54,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:54,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:54,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:54,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:54,409 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 09:26:54,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:54,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:54,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:54,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:54,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:54,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:54,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:54,435 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-04 09:26:54,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:54,481 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-04 09:26:54,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:54,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:54,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:54,482 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:26:54,482 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:26:54,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:54,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:26:54,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-10-04 09:26:54,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:26:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-04 09:26:54,495 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-04 09:26:54,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:54,496 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-04 09:26:54,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:54,496 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-04 09:26:54,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:54,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:54,496 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:54,497 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:54,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:54,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1960508467, now seen corresponding path program 28 times [2018-10-04 09:26:54,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:54,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:54,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:54,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:54,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:54,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:54,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:54,597 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:54,602 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:54,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:54,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:54,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:54,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:54,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:54,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:54,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:54,630 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-04 09:26:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:54,674 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-10-04 09:26:54,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:54,675 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:54,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:54,675 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:26:54,676 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 09:26:54,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:54,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 09:26:54,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-10-04 09:26:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:26:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:26:54,690 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-04 09:26:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:54,690 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:26:54,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:54,690 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:26:54,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:54,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:54,691 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:54,691 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:54,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:54,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1960510389, now seen corresponding path program 29 times [2018-10-04 09:26:54,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:54,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:54,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:54,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:54,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:54,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:54,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:54,760 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:54,768 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:26:54,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:54,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:54,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:54,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:54,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:54,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:54,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:54,798 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-04 09:26:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:54,831 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-10-04 09:26:54,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:54,832 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:54,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:54,833 INFO L225 Difference]: With dead ends: 26 [2018-10-04 09:26:54,833 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 09:26:54,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:54,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 09:26:54,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-10-04 09:26:54,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:26:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-04 09:26:54,845 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-10-04 09:26:54,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:54,845 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-04 09:26:54,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:54,845 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-04 09:26:54,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:54,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:54,845 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-04 09:26:54,846 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:54,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:54,846 INFO L82 PathProgramCache]: Analyzing trace with hash 863712433, now seen corresponding path program 30 times [2018-10-04 09:26:54,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:54,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:54,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:54,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:54,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:54,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:54,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:54,998 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:55,035 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-04 09:26:55,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:55,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:55,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:55,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:55,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:55,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:55,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:55,061 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-10-04 09:26:55,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:55,128 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-04 09:26:55,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:55,129 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:55,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:55,129 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:26:55,129 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:26:55,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:26:55,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-04 09:26:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:26:55,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:26:55,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-04 09:26:55,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:55,146 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:26:55,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:55,146 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:26:55,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:55,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:55,147 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:55,147 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:55,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:55,147 INFO L82 PathProgramCache]: Analyzing trace with hash 863714355, now seen corresponding path program 31 times [2018-10-04 09:26:55,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:55,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:55,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:55,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:55,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:55,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:55,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:55,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:55,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:55,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:55,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:55,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:55,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:55,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:55,329 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-04 09:26:55,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:55,382 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-04 09:26:55,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:55,383 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:55,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:55,383 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:26:55,383 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:26:55,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:55,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:26:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-10-04 09:26:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:26:55,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-04 09:26:55,399 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-04 09:26:55,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:55,399 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-04 09:26:55,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:55,400 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-04 09:26:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:55,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:55,400 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:55,400 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:55,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:55,400 INFO L82 PathProgramCache]: Analyzing trace with hash 865559475, now seen corresponding path program 32 times [2018-10-04 09:26:55,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:55,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:55,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:55,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:55,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:55,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:55,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:55,473 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:55,479 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:55,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:55,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:55,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:55,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:55,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:55,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:55,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:55,504 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-04 09:26:55,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:55,553 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-04 09:26:55,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:55,554 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:55,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:55,554 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:26:55,554 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:26:55,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:26:55,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-04 09:26:55,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:26:55,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:26:55,570 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-04 09:26:55,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:55,570 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:26:55,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:55,570 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:26:55,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:55,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:55,571 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:55,571 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:55,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:55,571 INFO L82 PathProgramCache]: Analyzing trace with hash 865561397, now seen corresponding path program 33 times [2018-10-04 09:26:55,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:55,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:55,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:55,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:55,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:55,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:55,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:55,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:55,676 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 09:26:55,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:55,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:55,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:55,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:55,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:55,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:55,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:55,702 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-04 09:26:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:55,753 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-04 09:26:55,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:55,754 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:55,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:55,754 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:26:55,754 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:26:55,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:55,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:26:55,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-10-04 09:26:55,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:26:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-04 09:26:55,767 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-10-04 09:26:55,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:55,767 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-04 09:26:55,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:55,767 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-04 09:26:55,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:55,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:55,768 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:55,768 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:55,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:55,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1656247501, now seen corresponding path program 34 times [2018-10-04 09:26:55,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:55,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:55,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:55,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:55,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:55,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:55,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:55,917 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:55,929 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:55,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:55,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:55,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:55,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:55,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:55,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:55,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:55,953 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-10-04 09:26:56,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:56,127 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-04 09:26:56,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:56,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:56,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:56,128 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:26:56,128 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:26:56,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:56,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:26:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-10-04 09:26:56,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:26:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:26:56,142 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-04 09:26:56,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:56,142 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:26:56,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:56,143 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:26:56,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:56,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:56,143 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:56,143 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:56,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:56,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1656245579, now seen corresponding path program 35 times [2018-10-04 09:26:56,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:56,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:56,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:56,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:56,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:56,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:56,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:56,214 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:56,220 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:26:56,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:56,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:56,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:56,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:56,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:56,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:56,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:56,244 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-04 09:26:56,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:56,276 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-04 09:26:56,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:56,277 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:56,277 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:26:56,277 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:26:56,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:56,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:26:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-10-04 09:26:56,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:26:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-04 09:26:56,292 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-04 09:26:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:56,293 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-04 09:26:56,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-04 09:26:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:56,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:56,293 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:56,293 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:56,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:56,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1654400459, now seen corresponding path program 36 times [2018-10-04 09:26:56,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:56,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:56,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:56,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:56,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:56,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:56,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:56,356 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:56,368 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-04 09:26:56,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:56,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:56,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:56,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:56,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:56,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:56,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:56,402 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-04 09:26:56,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:56,507 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-10-04 09:26:56,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:56,509 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:56,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:56,510 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:26:56,510 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 09:26:56,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 09:26:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-10-04 09:26:56,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:26:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:26:56,525 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-04 09:26:56,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:56,525 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:26:56,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:56,525 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:26:56,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:56,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:56,526 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-04 09:26:56,526 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:56,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:56,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1654398537, now seen corresponding path program 37 times [2018-10-04 09:26:56,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:56,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:56,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:56,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:56,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:56,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:56,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:56,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:56,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:56,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:56,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:56,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:56,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:56,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:56,620 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-04 09:26:56,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:56,659 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-10-04 09:26:56,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:56,659 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:56,660 INFO L225 Difference]: With dead ends: 26 [2018-10-04 09:26:56,660 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 09:26:56,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:56,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 09:26:56,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-10-04 09:26:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:26:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-04 09:26:56,671 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-10-04 09:26:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:56,671 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-04 09:26:56,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-04 09:26:56,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:56,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:56,671 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-04 09:26:56,671 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:56,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:56,672 INFO L82 PathProgramCache]: Analyzing trace with hash 884718641, now seen corresponding path program 38 times [2018-10-04 09:26:56,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:56,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:56,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:56,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:56,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:56,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:56,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:56,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:56,731 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:56,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:56,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:56,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:56,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:56,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:56,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:56,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:56,759 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-10-04 09:26:56,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:56,879 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:26:56,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:56,880 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:56,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:56,880 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:26:56,880 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:26:56,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:56,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:26:56,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-10-04 09:26:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:26:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:26:56,902 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-04 09:26:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:56,902 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:26:56,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:26:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:56,903 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:56,903 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:56,903 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:56,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:56,904 INFO L82 PathProgramCache]: Analyzing trace with hash 884720563, now seen corresponding path program 39 times [2018-10-04 09:26:56,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:56,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:56,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:56,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:56,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:57,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:57,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:57,413 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:57,424 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 09:26:57,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:57,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:57,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:57,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:57,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:57,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:57,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:57,450 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-04 09:26:57,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:57,625 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:26:57,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:57,625 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:57,626 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:26:57,626 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:26:57,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:57,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:26:57,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-10-04 09:26:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:26:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:26:57,644 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-04 09:26:57,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:57,644 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:26:57,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:57,644 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:26:57,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:57,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:57,644 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:57,645 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:57,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:57,645 INFO L82 PathProgramCache]: Analyzing trace with hash 886565683, now seen corresponding path program 40 times [2018-10-04 09:26:57,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:57,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:57,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:57,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:57,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:57,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:57,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:57,694 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:57,698 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:57,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:57,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:57,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:57,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:57,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:57,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:57,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:57,722 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-04 09:26:57,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:57,781 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:26:57,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:57,781 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:57,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:57,782 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:26:57,782 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:26:57,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:57,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:26:57,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-10-04 09:26:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:26:57,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:26:57,803 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-04 09:26:57,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:57,803 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:26:57,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:26:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:57,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:57,803 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:57,804 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:57,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:57,804 INFO L82 PathProgramCache]: Analyzing trace with hash 886567605, now seen corresponding path program 41 times [2018-10-04 09:26:57,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:57,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:57,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:57,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:57,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:57,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:57,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:57,880 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:57,886 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:26:57,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:57,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:57,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:57,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:57,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:57,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:57,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:57,911 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-04 09:26:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:57,966 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-04 09:26:57,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:57,966 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:57,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:57,967 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:26:57,967 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:26:57,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:57,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:26:57,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2018-10-04 09:26:57,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:26:57,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-04 09:26:57,983 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-04 09:26:57,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:57,983 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-04 09:26:57,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-04 09:26:57,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:57,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:57,984 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:57,984 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:57,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1635241293, now seen corresponding path program 42 times [2018-10-04 09:26:57,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:57,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:57,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:57,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:57,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:58,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:58,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:58,040 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:58,047 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-04 09:26:58,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:58,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:58,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:58,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:58,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:58,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:58,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:58,071 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-04 09:26:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:58,230 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:26:58,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:58,230 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:58,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:58,231 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:26:58,231 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:26:58,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:26:58,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-10-04 09:26:58,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:26:58,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:26:58,254 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-04 09:26:58,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:58,254 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:26:58,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:58,254 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:26:58,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:58,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:58,254 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:58,255 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:58,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:58,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1635239371, now seen corresponding path program 43 times [2018-10-04 09:26:58,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:58,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:58,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:58,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:58,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:58,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:58,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:58,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:58,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:58,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:58,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:58,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:58,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:58,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:58,358 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-04 09:26:58,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:58,431 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:26:58,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:58,431 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:58,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:58,431 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:26:58,431 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:26:58,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:58,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:26:58,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-10-04 09:26:58,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:26:58,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:26:58,453 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-04 09:26:58,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:58,453 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:26:58,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:58,453 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:26:58,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:58,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:58,453 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:58,454 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:58,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:58,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1633394251, now seen corresponding path program 44 times [2018-10-04 09:26:58,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:58,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:58,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:58,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:58,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:58,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:58,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:58,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:58,527 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:58,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:58,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:58,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:58,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:58,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:58,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:58,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:58,550 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-04 09:26:58,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:58,636 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:26:58,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:58,637 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:58,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:58,637 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:26:58,637 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:26:58,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:58,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:26:58,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-10-04 09:26:58,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:26:58,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:26:58,660 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-04 09:26:58,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:58,660 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:26:58,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:58,660 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:26:58,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:58,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:58,660 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-04 09:26:58,660 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:58,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:58,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1633392329, now seen corresponding path program 45 times [2018-10-04 09:26:58,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:58,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:58,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:58,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:58,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:58,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:58,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:58,734 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:58,740 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 09:26:58,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:58,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:58,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:58,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:58,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:58,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:58,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:58,765 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-04 09:26:58,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:58,828 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-04 09:26:58,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:58,829 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:58,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:58,829 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:26:58,829 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:26:58,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:58,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:26:58,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2018-10-04 09:26:58,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:26:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-04 09:26:58,844 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-10-04 09:26:58,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:58,844 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-04 09:26:58,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-04 09:26:58,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:58,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:58,845 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:58,845 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:58,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:58,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1564777011, now seen corresponding path program 46 times [2018-10-04 09:26:58,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:58,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:58,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:58,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:58,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:58,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:58,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:58,942 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:58,946 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:58,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:58,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:58,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:58,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:58,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:58,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:58,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:58,971 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-10-04 09:26:59,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:59,031 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-04 09:26:59,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:59,031 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:59,032 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:26:59,032 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:26:59,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:26:59,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-10-04 09:26:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:26:59,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:26:59,059 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-04 09:26:59,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:59,059 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:26:59,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:59,060 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:26:59,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:59,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:59,060 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:59,060 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:59,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:59,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1564778933, now seen corresponding path program 47 times [2018-10-04 09:26:59,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:59,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:59,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:59,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:59,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:59,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:59,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:59,130 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:59,136 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:26:59,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:59,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:59,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:59,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:59,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:59,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:59,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:59,160 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-04 09:26:59,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:59,223 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-04 09:26:59,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:59,224 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:59,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:59,224 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:26:59,224 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:26:59,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:59,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:26:59,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-04 09:26:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:26:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:26:59,253 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-04 09:26:59,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:59,253 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:26:59,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:59,253 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:26:59,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:59,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:59,253 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:59,254 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:59,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:59,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1566624053, now seen corresponding path program 48 times [2018-10-04 09:26:59,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:59,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:59,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:59,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:59,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:59,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:59,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:59,331 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:59,338 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-04 09:26:59,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:59,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:59,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:59,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:59,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:59,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:59,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:59,365 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-04 09:26:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:59,433 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-04 09:26:59,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:59,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:59,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:59,434 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:26:59,434 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:26:59,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:26:59,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-10-04 09:26:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:26:59,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:26:59,458 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-04 09:26:59,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:59,458 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:26:59,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:59,458 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:26:59,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:59,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:59,458 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-04 09:26:59,458 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:59,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:59,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1566625975, now seen corresponding path program 49 times [2018-10-04 09:26:59,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:59,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:59,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:59,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:59,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:59,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:59,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:59,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:59,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:59,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:59,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:59,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:59,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:59,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:59,558 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-04 09:26:59,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:59,677 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-04 09:26:59,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:59,677 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:59,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:59,678 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:26:59,678 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:26:59,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:59,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:26:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2018-10-04 09:26:59,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:26:59,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-04 09:26:59,698 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-04 09:26:59,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:59,699 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-04 09:26:59,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-04 09:26:59,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:59,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:59,699 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-04 09:26:59,700 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:59,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:59,700 INFO L82 PathProgramCache]: Analyzing trace with hash -955182923, now seen corresponding path program 50 times [2018-10-04 09:26:59,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:59,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:59,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:59,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:59,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:59,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:59,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:59,757 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:59,761 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:59,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:59,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:59,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:59,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:59,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:59,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:59,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:59,786 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-04 09:26:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:59,848 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-04 09:26:59,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:26:59,848 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:26:59,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:59,848 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:26:59,848 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:26:59,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:59,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:26:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-10-04 09:26:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:26:59,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:26:59,875 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-04 09:26:59,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:59,875 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:26:59,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:26:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:26:59,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:26:59,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:59,876 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-04 09:26:59,876 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:59,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:59,877 INFO L82 PathProgramCache]: Analyzing trace with hash -955181001, now seen corresponding path program 51 times [2018-10-04 09:26:59,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:59,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:59,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:59,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:59,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:59,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:59,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:59,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:59,945 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 09:26:59,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:59,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:59,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:59,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:26:59,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:26:59,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:26:59,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:26:59,969 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-04 09:27:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:00,035 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-04 09:27:00,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:27:00,036 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:27:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:00,036 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:27:00,036 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:27:00,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:27:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:27:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-04 09:27:00,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:27:00,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:27:00,063 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-04 09:27:00,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:00,063 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:27:00,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:27:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:27:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:27:00,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:00,064 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-04 09:27:00,064 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:00,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:00,065 INFO L82 PathProgramCache]: Analyzing trace with hash -953335881, now seen corresponding path program 52 times [2018-10-04 09:27:00,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:00,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:00,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:00,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:00,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:00,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:00,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:00,172 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:00,177 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:00,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:00,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:00,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:00,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:27:00,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:27:00,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:27:00,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:27:00,200 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-04 09:27:00,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:00,257 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-04 09:27:00,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:27:00,258 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:27:00,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:00,258 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:27:00,258 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:27:00,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:27:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:27:00,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-10-04 09:27:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:00,283 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-04 09:27:00,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:00,283 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:00,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:27:00,283 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:00,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:27:00,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:00,284 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-10-04 09:27:00,284 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:00,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:00,284 INFO L82 PathProgramCache]: Analyzing trace with hash -953333959, now seen corresponding path program 5 times [2018-10-04 09:27:00,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:00,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:00,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:00,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:00,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:00,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:00,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:00,329 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:00,336 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:27:00,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:00,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:00,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:00,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:27:00,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:27:00,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:27:00,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:27:00,360 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-04 09:27:00,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:00,419 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2018-10-04 09:27:00,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:27:00,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:27:00,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:00,420 INFO L225 Difference]: With dead ends: 28 [2018-10-04 09:27:00,420 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 09:27:00,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:27:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 09:27:00,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2018-10-04 09:27:00,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:27:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-04 09:27:00,439 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-10-04 09:27:00,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:00,440 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-04 09:27:00,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:27:00,440 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-04 09:27:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:00,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:00,440 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-10-04 09:27:00,440 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:00,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:00,441 INFO L82 PathProgramCache]: Analyzing trace with hash 397590258, now seen corresponding path program 6 times [2018-10-04 09:27:00,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:00,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:00,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:00,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:00,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:00,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:00,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:00,511 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:00,520 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:27:00,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:00,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:00,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:00,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:00,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:00,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:00,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:00,556 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 9 states. [2018-10-04 09:27:00,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:00,642 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:00,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:00,643 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:00,643 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:00,643 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:00,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:00,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-04 09:27:00,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:00,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:00,678 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:00,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:00,678 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:00,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:00,679 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:00,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:00,679 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-04 09:27:00,679 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:00,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:00,680 INFO L82 PathProgramCache]: Analyzing trace with hash 397592180, now seen corresponding path program 53 times [2018-10-04 09:27:00,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:00,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:00,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:00,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:00,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:00,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:00,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:00,747 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:00,759 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:27:00,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:00,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:00,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:00,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:00,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:00,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:00,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:00,784 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:00,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:00,883 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:00,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:00,884 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:00,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:00,884 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:00,884 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:00,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:00,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:00,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-04 09:27:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:00,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:00,914 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-04 09:27:00,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:00,914 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:00,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:00,914 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:00,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:00,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:00,915 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-04 09:27:00,915 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:00,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:00,915 INFO L82 PathProgramCache]: Analyzing trace with hash 399437300, now seen corresponding path program 54 times [2018-10-04 09:27:00,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:00,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:00,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:00,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:00,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:01,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:01,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:01,082 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:01,090 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:27:01,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:01,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:01,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:01,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:01,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:01,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:01,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:01,116 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-04 09:27:01,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:01,321 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:27:01,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:01,321 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:01,322 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:27:01,322 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:27:01,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:01,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:27:01,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-04 09:27:01,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:01,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:01,354 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:01,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:01,354 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:01,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:01,354 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:01,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:01,354 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:01,354 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:01,354 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:01,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:01,355 INFO L82 PathProgramCache]: Analyzing trace with hash 399439222, now seen corresponding path program 55 times [2018-10-04 09:27:01,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:01,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:01,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:01,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:01,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:01,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:01,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:01,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:01,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:01,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:01,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:01,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:01,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:01,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:01,468 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:01,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:01,568 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:27:01,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:01,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:01,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:01,569 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:27:01,569 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:27:01,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:01,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:27:01,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-10-04 09:27:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:27:01,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:27:01,598 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-04 09:27:01,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:01,598 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:27:01,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:27:01,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:01,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:01,598 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-04 09:27:01,598 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:01,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:01,599 INFO L82 PathProgramCache]: Analyzing trace with hash -2122369676, now seen corresponding path program 56 times [2018-10-04 09:27:01,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:01,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:01,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:01,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:01,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:01,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:01,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:01,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:01,665 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:01,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:01,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:01,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:01,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:01,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:01,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:01,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:01,689 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-04 09:27:01,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:01,785 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:01,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:01,786 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:01,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:01,786 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:01,786 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:01,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:01,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-04 09:27:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:01,820 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:01,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:01,820 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:01,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:01,821 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:01,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:01,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:01,821 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:01,821 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:01,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:01,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2122367754, now seen corresponding path program 57 times [2018-10-04 09:27:01,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:01,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:01,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:01,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:01,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:01,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:01,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:01,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:01,888 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 09:27:01,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:01,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:01,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:01,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:01,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:01,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:01,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:01,912 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:02,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:02,018 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:02,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:02,018 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:02,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:02,019 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:02,019 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:02,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:02,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:02,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-04 09:27:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:02,053 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-04 09:27:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:02,053 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:02,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:02,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:02,054 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:02,054 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:02,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:02,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2120522634, now seen corresponding path program 58 times [2018-10-04 09:27:02,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:02,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:02,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:02,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:02,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:02,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:02,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:02,178 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:02,209 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:02,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:02,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:02,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:02,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:02,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:02,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:02,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:02,241 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-04 09:27:02,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:02,337 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:27:02,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:02,338 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:02,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:02,338 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:27:02,338 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:27:02,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:02,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:27:02,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-04 09:27:02,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:02,371 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:02,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:02,371 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:02,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:02,371 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:02,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:02,372 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:02,372 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:02,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:02,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2120520712, now seen corresponding path program 59 times [2018-10-04 09:27:02,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:02,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:02,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:02,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:02,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:02,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:02,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:02,482 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:02,492 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:27:02,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:02,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:02,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:02,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:02,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:02,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:02,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:02,516 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:02,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:02,592 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:27:02,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:02,593 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:02,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:02,593 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:27:02,593 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:27:02,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:02,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:27:02,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-10-04 09:27:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:27:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-04 09:27:02,624 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-10-04 09:27:02,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:02,625 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-04 09:27:02,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:02,625 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-04 09:27:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:02,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:02,625 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-04 09:27:02,625 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:02,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:02,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1077648628, now seen corresponding path program 60 times [2018-10-04 09:27:02,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:02,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:02,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:02,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:02,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:02,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:02,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:02,689 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:02,696 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:27:02,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:02,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:02,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:02,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:02,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:02,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:02,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:02,724 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-10-04 09:27:02,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:02,806 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:27:02,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:02,807 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:02,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:02,807 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:27:02,807 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:27:02,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:02,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:27:02,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-04 09:27:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:02,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:02,844 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:02,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:02,844 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:02,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:02,845 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:02,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:02,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:02,845 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:02,845 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:02,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:02,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1077650550, now seen corresponding path program 61 times [2018-10-04 09:27:02,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:02,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:02,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:02,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:02,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:02,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:02,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:02,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:02,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:02,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:02,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:02,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:02,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:02,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:02,966 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:03,057 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-04 09:27:03,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:03,057 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:03,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:03,058 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:27:03,058 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:27:03,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:27:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-10-04 09:27:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:03,093 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-04 09:27:03,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:03,093 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:03,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:03,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:03,094 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:03,094 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:03,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:03,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1079495670, now seen corresponding path program 62 times [2018-10-04 09:27:03,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:03,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:03,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:03,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:03,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:03,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:03,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:03,224 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:03,230 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:03,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:03,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:03,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:03,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:03,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:03,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:03,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:03,255 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-04 09:27:03,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:03,337 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:27:03,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:03,337 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:03,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:03,338 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:27:03,338 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:27:03,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:03,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:27:03,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-04 09:27:03,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:03,375 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:03,375 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:03,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:03,376 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:03,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:03,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:03,376 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:03,376 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:03,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:03,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1079497592, now seen corresponding path program 63 times [2018-10-04 09:27:03,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:03,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:03,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:03,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:03,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:03,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:03,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:03,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:03,455 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 09:27:03,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:03,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:03,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:03,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:03,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:03,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:03,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:03,479 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:03,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:03,562 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-04 09:27:03,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:03,563 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:03,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:03,563 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:27:03,564 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:27:03,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:03,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:27:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-10-04 09:27:03,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:27:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:27:03,598 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-04 09:27:03,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:03,598 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:27:03,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:03,598 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:27:03,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:03,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:03,599 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:03,599 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:03,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:03,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1442311306, now seen corresponding path program 64 times [2018-10-04 09:27:03,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:03,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:03,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:03,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:03,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:03,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:03,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:03,658 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:03,663 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:03,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:03,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:03,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:03,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:03,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:03,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:03,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:03,688 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-04 09:27:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:03,775 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-04 09:27:03,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:03,776 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:03,776 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:27:03,776 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:27:03,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:03,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:27:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-10-04 09:27:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:03,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:03,817 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:03,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:03,817 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:03,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:03,818 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:03,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:03,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:03,818 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:03,818 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:03,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:03,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1442309384, now seen corresponding path program 65 times [2018-10-04 09:27:03,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:03,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:03,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:03,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:03,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:03,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:03,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:03,909 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:03,917 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:27:03,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:03,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:03,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:03,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:03,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:03,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:03,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:03,942 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:04,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:04,025 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-04 09:27:04,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:04,025 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:04,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:04,025 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:27:04,025 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:27:04,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:27:04,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-10-04 09:27:04,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:04,065 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-04 09:27:04,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:04,065 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:04,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:04,065 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:04,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:04,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:04,065 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:04,066 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:04,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:04,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1440464264, now seen corresponding path program 66 times [2018-10-04 09:27:04,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:04,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:04,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:04,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:04,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:04,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:04,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:04,142 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:04,151 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:27:04,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:04,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:04,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:04,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:04,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:04,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:04,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:04,176 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-04 09:27:04,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:04,264 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-04 09:27:04,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:04,264 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:04,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:04,264 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:27:04,264 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:27:04,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:04,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:27:04,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-10-04 09:27:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:04,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:04,300 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:04,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:04,300 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:04,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:04,300 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:04,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:04,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:04,300 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:04,300 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:04,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:04,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1440462342, now seen corresponding path program 67 times [2018-10-04 09:27:04,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:04,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:04,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:04,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:04,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:04,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:04,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:04,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:04,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:04,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:04,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:04,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:04,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:04,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:04,394 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:04,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:04,472 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-10-04 09:27:04,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:04,472 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:04,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:04,472 INFO L225 Difference]: With dead ends: 30 [2018-10-04 09:27:04,472 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 09:27:04,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:04,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 09:27:04,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-10-04 09:27:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:27:04,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-04 09:27:04,496 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-10-04 09:27:04,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:04,497 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-04 09:27:04,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:04,497 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-04 09:27:04,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:04,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:04,497 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-04 09:27:04,497 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:04,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:04,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1098654836, now seen corresponding path program 68 times [2018-10-04 09:27:04,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:04,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:04,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:04,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:04,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:04,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:04,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:04,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:04,575 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:04,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:04,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:04,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:04,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:04,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:04,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:04,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:04,598 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-10-04 09:27:04,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:04,707 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:04,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:04,708 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:04,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:04,708 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:04,708 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:04,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:04,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:04,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-04 09:27:04,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:04,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:04,751 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:04,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:04,752 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:04,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:04,752 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:04,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:04,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:04,752 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:04,752 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:04,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:04,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1098656758, now seen corresponding path program 69 times [2018-10-04 09:27:04,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:04,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:04,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:04,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:04,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:05,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:05,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:05,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:05,250 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 09:27:05,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:05,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:05,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:05,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:05,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:05,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:05,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:05,274 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:05,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:05,373 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:05,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:05,374 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:05,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:05,374 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:05,374 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:05,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:05,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:05,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-04 09:27:05,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:05,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:05,416 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-04 09:27:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:05,416 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:05,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:05,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:05,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:05,417 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:05,417 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:05,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:05,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1100501878, now seen corresponding path program 70 times [2018-10-04 09:27:05,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:05,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:05,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:05,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:05,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:05,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:05,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:05,474 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:05,479 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:05,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:05,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:05,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:05,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:05,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:05,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:05,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:05,503 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-04 09:27:05,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:05,609 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:27:05,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:05,610 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:05,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:05,610 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:27:05,610 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:27:05,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:05,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:27:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-04 09:27:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:05,653 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:05,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:05,653 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:05,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:05,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:05,654 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:05,654 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:05,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:05,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1100503800, now seen corresponding path program 71 times [2018-10-04 09:27:05,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:05,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:05,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:05,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:05,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:05,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:05,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:05,716 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:05,725 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:27:05,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:05,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:05,729 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:05,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:05,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:05,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:05,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:05,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:05,749 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:05,860 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:27:05,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:05,860 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:05,861 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:27:05,861 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:27:05,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:27:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-10-04 09:27:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:27:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:27:05,898 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-04 09:27:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:05,899 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:27:05,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:27:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:05,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:05,899 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:05,899 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:05,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:05,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1421305098, now seen corresponding path program 72 times [2018-10-04 09:27:05,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:05,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:05,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:05,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:05,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:05,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:05,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:05,975 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:05,983 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:27:05,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:05,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:06,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:06,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:06,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:06,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:06,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:06,006 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-04 09:27:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:06,150 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:06,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:06,150 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:06,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:06,151 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:06,151 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:06,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:06,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:06,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-04 09:27:06,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:06,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:06,196 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:06,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:06,197 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:06,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:06,197 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:06,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:06,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:06,197 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:06,197 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:06,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:06,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1421303176, now seen corresponding path program 73 times [2018-10-04 09:27:06,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:06,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:06,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:06,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:06,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:06,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:06,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:06,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:06,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:06,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:06,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:06,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:06,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:06,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:06,328 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:06,438 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:06,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:06,439 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:06,439 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:06,439 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:06,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:06,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:06,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-04 09:27:06,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:06,483 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-04 09:27:06,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:06,483 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:06,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:06,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:06,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:06,484 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:06,484 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:06,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:06,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1419458056, now seen corresponding path program 74 times [2018-10-04 09:27:06,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:06,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:06,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:06,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:06,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:06,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:06,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:06,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:06,570 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:06,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:06,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:06,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:06,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:06,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:06,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:06,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:06,595 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-04 09:27:06,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:06,694 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:27:06,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:06,695 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:06,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:06,695 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:27:06,695 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:27:06,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:06,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:27:06,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-04 09:27:06,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:06,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:06,740 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:06,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:06,740 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:06,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:06,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:06,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:06,741 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:06,741 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:06,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:06,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1419456134, now seen corresponding path program 75 times [2018-10-04 09:27:06,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:06,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:06,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:06,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:06,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:06,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:06,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:06,807 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:06,815 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 09:27:06,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:06,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:06,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:06,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:06,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:06,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:06,839 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:06,941 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:27:06,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:06,942 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:06,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:06,942 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:27:06,942 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:27:06,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:27:06,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-10-04 09:27:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:27:06,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-04 09:27:06,975 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-10-04 09:27:06,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:06,975 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-04 09:27:06,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:06,975 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-04 09:27:06,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:06,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:06,976 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:06,976 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:06,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:06,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1778713206, now seen corresponding path program 76 times [2018-10-04 09:27:06,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:06,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:06,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:06,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:06,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:07,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:07,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:07,263 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:07,274 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:07,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:07,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:07,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:07,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:07,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:07,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:07,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:07,296 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-10-04 09:27:07,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:07,392 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:27:07,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:07,393 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:07,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:07,393 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:27:07,393 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:27:07,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:07,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:27:07,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-04 09:27:07,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:07,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:07,440 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:07,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:07,440 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:07,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:07,441 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:07,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:07,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:07,441 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:07,441 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:07,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:07,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1778715128, now seen corresponding path program 77 times [2018-10-04 09:27:07,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:07,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:07,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:07,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:07,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:07,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:07,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:07,514 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:07,522 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:27:07,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:07,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:07,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:07,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:07,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:07,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:07,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:07,551 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:07,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:07,655 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-04 09:27:07,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:07,656 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:07,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:07,656 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:27:07,656 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:27:07,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:07,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:27:07,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-10-04 09:27:07,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:07,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:07,698 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-04 09:27:07,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:07,698 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:07,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:07,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:07,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:07,698 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:07,699 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:07,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:07,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1780560248, now seen corresponding path program 78 times [2018-10-04 09:27:07,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:07,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:07,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:07,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:07,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:07,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:07,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:07,764 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:07,772 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:27:07,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:07,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:07,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:07,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:07,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:07,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:07,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:07,796 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-04 09:27:07,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:07,906 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:27:07,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:07,907 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:07,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:07,907 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:27:07,907 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:27:07,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:07,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:27:07,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-04 09:27:07,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:07,974 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:07,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:07,974 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:07,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:07,975 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:07,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:07,975 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:07,975 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:07,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:07,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1780562170, now seen corresponding path program 79 times [2018-10-04 09:27:07,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:07,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:07,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:07,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:07,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:08,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:08,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:08,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:08,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:08,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:08,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:08,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:08,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:08,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:08,118 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:08,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:08,213 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-04 09:27:08,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:08,214 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:08,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:08,214 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:27:08,214 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:27:08,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:08,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:27:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-10-04 09:27:08,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:27:08,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:27:08,255 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-04 09:27:08,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:08,255 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:27:08,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:08,255 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:27:08,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:08,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:08,256 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:08,256 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:08,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:08,256 INFO L82 PathProgramCache]: Analyzing trace with hash -741246728, now seen corresponding path program 80 times [2018-10-04 09:27:08,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:08,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:08,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:08,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:08,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:08,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:08,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:08,373 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:08,378 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:08,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:08,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:08,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:08,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:08,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:08,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:08,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:08,404 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-04 09:27:08,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:08,505 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-04 09:27:08,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:08,505 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:08,506 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:27:08,506 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:27:08,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:08,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:27:08,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-10-04 09:27:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:08,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:08,552 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:08,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:08,552 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:08,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:08,553 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:08,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:08,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:08,553 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:08,553 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:08,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:08,553 INFO L82 PathProgramCache]: Analyzing trace with hash -741244806, now seen corresponding path program 81 times [2018-10-04 09:27:08,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:08,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:08,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:08,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:08,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:08,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:08,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:08,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:08,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 09:27:08,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:08,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:08,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:08,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:08,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:08,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:08,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:08,790 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:08,883 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-04 09:27:08,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:08,883 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:08,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:08,884 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:27:08,884 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:27:08,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:27:08,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-10-04 09:27:08,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:08,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:08,924 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-04 09:27:08,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:08,924 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:08,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:08,924 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:08,924 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:08,924 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:08,925 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:08,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:08,925 INFO L82 PathProgramCache]: Analyzing trace with hash -739399686, now seen corresponding path program 82 times [2018-10-04 09:27:08,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:08,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:08,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:08,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:08,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:08,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:08,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:08,982 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:08,987 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:08,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:08,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:09,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:09,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:09,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:09,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:09,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:09,010 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-04 09:27:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:09,103 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-04 09:27:09,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:09,104 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:09,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:09,104 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:27:09,104 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:27:09,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:27:09,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-10-04 09:27:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:09,153 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:09,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:09,153 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:09,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:09,153 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:09,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:09,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:09,153 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-04 09:27:09,153 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:09,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:09,154 INFO L82 PathProgramCache]: Analyzing trace with hash -739397764, now seen corresponding path program 83 times [2018-10-04 09:27:09,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:09,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:09,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:09,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:09,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:09,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:09,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:09,218 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:09,229 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:27:09,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:09,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:09,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:09,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:09,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:09,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:09,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:09,254 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:09,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:09,343 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-10-04 09:27:09,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:09,343 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:09,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:09,344 INFO L225 Difference]: With dead ends: 30 [2018-10-04 09:27:09,344 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 09:27:09,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:09,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 09:27:09,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-10-04 09:27:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:27:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-04 09:27:09,375 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-10-04 09:27:09,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:09,375 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-04 09:27:09,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-04 09:27:09,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:09,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:09,375 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-04 09:27:09,375 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:09,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:09,376 INFO L82 PathProgramCache]: Analyzing trace with hash -189215756, now seen corresponding path program 84 times [2018-10-04 09:27:09,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:09,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:09,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:09,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:09,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:09,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:09,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:09,446 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:09,454 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:27:09,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:09,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:09,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:09,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:09,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:09,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:09,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:09,479 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-10-04 09:27:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:09,644 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:27:09,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:09,645 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:09,645 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:27:09,645 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:27:09,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:09,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:27:09,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-04 09:27:09,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:09,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:09,700 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-04 09:27:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:09,701 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:09,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:09,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:09,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:09,701 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:09,702 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:09,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:09,702 INFO L82 PathProgramCache]: Analyzing trace with hash -189213834, now seen corresponding path program 85 times [2018-10-04 09:27:09,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:09,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:09,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:09,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:09,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:09,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:09,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:09,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:09,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:09,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:09,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:09,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:09,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:09,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:09,803 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-04 09:27:09,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:09,967 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:27:09,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:09,967 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:09,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:09,967 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:27:09,967 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:27:09,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:09,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:27:10,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-04 09:27:10,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:10,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:10,016 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:10,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:10,016 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:10,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:10,017 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:10,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:10,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:10,017 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:10,017 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:10,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:10,017 INFO L82 PathProgramCache]: Analyzing trace with hash -187368714, now seen corresponding path program 86 times [2018-10-04 09:27:10,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:10,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:10,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:10,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:10,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:10,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:10,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:10,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:10,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:10,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:10,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:10,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:10,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:10,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:10,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:10,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:10,168 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:10,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:10,347 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:27:10,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:10,348 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:10,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:10,348 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:27:10,348 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:27:10,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:27:10,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-04 09:27:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:10,406 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-04 09:27:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:10,407 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:10,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:10,407 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:10,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:10,407 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:10,407 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:10,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:10,407 INFO L82 PathProgramCache]: Analyzing trace with hash -187366792, now seen corresponding path program 87 times [2018-10-04 09:27:10,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:10,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:10,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:10,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:10,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:10,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:10,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:10,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:10,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 09:27:10,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:10,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:10,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:10,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:10,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:10,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:10,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:10,554 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-04 09:27:10,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:10,770 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:27:10,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:10,771 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:10,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:10,771 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:27:10,771 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:27:10,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:10,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:27:10,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-10-04 09:27:10,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:10,855 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-04 09:27:10,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:10,855 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:10,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:10,855 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:10,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:10,856 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:10,856 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:10,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:10,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1585791606, now seen corresponding path program 88 times [2018-10-04 09:27:10,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:10,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:10,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:10,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:10,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:11,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:11,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:11,675 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:11,708 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:11,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:11,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:11,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:11,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:11,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:11,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:11,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:11,751 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-04 09:27:12,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:12,299 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:27:12,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:12,299 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:12,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:12,300 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:12,300 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:27:12,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:12,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:27:12,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-04 09:27:12,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:12,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:12,392 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-04 09:27:12,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:12,392 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:12,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:12,392 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:12,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:12,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:12,393 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:12,393 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:12,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:12,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1585793528, now seen corresponding path program 89 times [2018-10-04 09:27:12,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:12,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:12,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:12,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:12,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:12,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:12,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:12,536 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:12,543 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:27:12,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:12,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:12,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:12,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:12,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:12,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:12,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:12,567 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-04 09:27:12,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:12,731 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:27:12,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:12,731 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:12,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:12,732 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:12,732 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:27:12,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:12,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:27:12,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-10-04 09:27:12,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:12,791 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:12,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:12,791 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:12,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:12,791 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:12,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:12,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:12,792 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:12,792 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:12,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:12,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1587638648, now seen corresponding path program 90 times [2018-10-04 09:27:12,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:12,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:12,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:12,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:12,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:12,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:12,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:12,852 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:12,860 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:27:12,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:12,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:12,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:12,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:12,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:12,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:12,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:12,884 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:13,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:13,030 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:27:13,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:13,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:13,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:13,032 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:27:13,032 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:27:13,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:13,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:27:13,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-04 09:27:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:13,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:13,088 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-04 09:27:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:13,088 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:13,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:13,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:13,089 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:13,089 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:13,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:13,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1587640570, now seen corresponding path program 91 times [2018-10-04 09:27:13,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:13,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:13,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:13,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:13,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:13,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:13,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:13,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:13,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:13,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:13,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:13,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:13,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:13,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:13,192 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-04 09:27:13,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:13,328 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:13,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:13,328 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:13,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:13,329 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:13,329 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:13,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:13,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2018-10-04 09:27:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:27:13,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:27:13,376 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-04 09:27:13,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:13,376 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:27:13,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:13,376 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:27:13,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:13,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:13,376 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:13,376 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:13,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:13,377 INFO L82 PathProgramCache]: Analyzing trace with hash 490842614, now seen corresponding path program 92 times [2018-10-04 09:27:13,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:13,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:13,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:13,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:13,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:13,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:13,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:13,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:13,509 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:13,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:13,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:13,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:13,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:13,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:13,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:13,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:13,535 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-04 09:27:13,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:13,728 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:27:13,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:13,728 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:13,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:13,729 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:27:13,729 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:27:13,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:13,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:27:13,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-04 09:27:13,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:13,797 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-04 09:27:13,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:13,797 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:13,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:13,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:13,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:13,798 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:13,798 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:13,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:13,798 INFO L82 PathProgramCache]: Analyzing trace with hash 490844536, now seen corresponding path program 93 times [2018-10-04 09:27:13,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:13,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:13,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:13,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:13,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:13,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:13,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:13,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:13,877 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 09:27:13,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:13,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:13,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:13,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:13,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:13,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:13,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:13,901 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-04 09:27:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:14,119 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:27:14,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:14,119 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:14,120 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:27:14,120 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:27:14,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:27:14,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-04 09:27:14,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:14,219 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:14,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:14,219 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:14,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:14,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:14,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:14,219 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:14,220 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:14,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:14,220 INFO L82 PathProgramCache]: Analyzing trace with hash 492689656, now seen corresponding path program 94 times [2018-10-04 09:27:14,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:14,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:14,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:14,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:14,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:14,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:14,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:14,461 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:14,468 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:14,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:14,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:14,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:14,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:14,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:14,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:14,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:14,492 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:14,646 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:27:14,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:14,647 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:14,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:14,647 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:27:14,647 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:27:14,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:14,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:27:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-04 09:27:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:14,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:14,703 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-04 09:27:14,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:14,703 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:14,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:14,703 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:14,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:14,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:14,704 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:14,704 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:14,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:14,704 INFO L82 PathProgramCache]: Analyzing trace with hash 492691578, now seen corresponding path program 95 times [2018-10-04 09:27:14,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:14,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:14,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:14,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:14,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:14,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:14,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:14,814 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:14,851 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:27:14,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:14,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:14,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:14,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:14,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:14,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:14,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:14,874 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-04 09:27:15,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:15,019 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:27:15,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:15,020 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:15,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:15,020 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:27:15,020 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:27:15,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:15,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:27:15,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-10-04 09:27:15,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:15,072 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-04 09:27:15,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:15,072 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:15,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:15,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:15,073 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:15,073 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:15,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:15,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2029117320, now seen corresponding path program 96 times [2018-10-04 09:27:15,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:15,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:15,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:15,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:15,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:15,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:15,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:15,135 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:15,145 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:27:15,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:15,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:15,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:15,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:15,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:15,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:15,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:15,170 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-04 09:27:15,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:15,308 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:27:15,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:15,308 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:15,309 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:15,309 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:27:15,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:15,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:27:15,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-04 09:27:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:15,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:15,370 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-04 09:27:15,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:15,370 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:15,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:15,370 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:15,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:15,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:15,370 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:15,371 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:15,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:15,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2029115398, now seen corresponding path program 97 times [2018-10-04 09:27:15,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:15,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:15,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:15,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:15,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:15,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:15,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:15,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:15,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:15,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:15,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:15,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:15,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:15,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:15,527 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-04 09:27:15,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:15,670 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:27:15,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:15,671 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:15,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:15,671 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:15,671 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:27:15,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:15,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:27:15,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-10-04 09:27:15,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:15,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:15,732 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:15,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:15,732 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:15,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:15,732 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:15,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:15,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:15,732 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:15,733 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:15,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:15,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2027270278, now seen corresponding path program 98 times [2018-10-04 09:27:15,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:15,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:15,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:15,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:15,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:16,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:16,543 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) [2018-10-04 09:27:16,557 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:16,569 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:16,570 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:16,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:16,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:16,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:16,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:16,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:16,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:16,592 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:16,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:16,742 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:27:16,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:16,743 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:16,743 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:27:16,743 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:27:16,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:16,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:27:16,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-04 09:27:16,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:16,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:16,806 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-04 09:27:16,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:16,806 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:16,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:16,807 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:16,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:16,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:16,807 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-04 09:27:16,807 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:16,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:16,807 INFO L82 PathProgramCache]: Analyzing trace with hash -2027268356, now seen corresponding path program 99 times [2018-10-04 09:27:16,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:16,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:16,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:16,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:16,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:16,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:16,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:16,884 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:16,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 09:27:16,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:16,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:16,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:16,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:16,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:16,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:16,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:16,918 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-04 09:27:17,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:17,068 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:17,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:17,069 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:17,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:17,069 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:17,069 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:17,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:17,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:17,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2018-10-04 09:27:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:27:17,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-04 09:27:17,113 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-10-04 09:27:17,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:17,113 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-04 09:27:17,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:17,113 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-04 09:27:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:17,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:17,113 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:17,114 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:17,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:17,114 INFO L82 PathProgramCache]: Analyzing trace with hash 511848822, now seen corresponding path program 100 times [2018-10-04 09:27:17,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:17,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:17,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:17,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:17,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:17,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:17,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:17,172 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:17,178 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:17,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:17,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:17,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:17,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:17,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:17,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:17,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:17,204 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-10-04 09:27:17,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:17,421 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:27:17,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:17,421 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:17,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:17,422 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:27:17,422 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:27:17,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:17,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:27:17,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-04 09:27:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:17,486 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-04 09:27:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:17,486 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:17,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:17,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:17,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:17,486 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:17,486 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:17,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:17,487 INFO L82 PathProgramCache]: Analyzing trace with hash 511850744, now seen corresponding path program 101 times [2018-10-04 09:27:17,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:17,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:17,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:17,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:17,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:17,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:17,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:17,567 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:17,584 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:27:17,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:17,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:17,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:17,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:17,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:17,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:17,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:17,608 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-04 09:27:17,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:17,767 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:27:17,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:17,768 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:17,769 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:27:17,769 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:27:17,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:17,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:27:17,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-10-04 09:27:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:17,834 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:17,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:17,834 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:17,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:17,834 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:17,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:17,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:17,835 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:17,835 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:17,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:17,835 INFO L82 PathProgramCache]: Analyzing trace with hash 513695864, now seen corresponding path program 102 times [2018-10-04 09:27:17,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:17,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:17,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:17,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:17,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:17,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:17,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:17,895 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:17,907 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:27:17,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:17,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:17,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:17,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:17,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:17,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:17,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:17,932 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:18,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:18,088 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:18,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:18,089 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:18,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:18,089 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:18,089 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:18,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:18,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:18,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-04 09:27:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:18,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:18,164 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-04 09:27:18,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:18,164 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:18,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:18,164 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:18,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:18,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:18,165 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:18,165 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:18,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:18,165 INFO L82 PathProgramCache]: Analyzing trace with hash 513697786, now seen corresponding path program 103 times [2018-10-04 09:27:18,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:18,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:18,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:18,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:18,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:18,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:18,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:18,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:18,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:18,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:18,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:18,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:18,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:18,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:18,257 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-04 09:27:18,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:18,405 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:27:18,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:18,408 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:18,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:18,409 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:27:18,409 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:27:18,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:18,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:27:18,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-10-04 09:27:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:18,468 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-04 09:27:18,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:18,468 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:18,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:18,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:18,468 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:18,468 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:18,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:18,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2008111112, now seen corresponding path program 104 times [2018-10-04 09:27:18,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:18,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:18,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:18,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:18,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:18,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:18,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:18,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:18,548 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:18,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:18,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:18,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:18,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:18,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:18,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:18,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:18,573 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-04 09:27:18,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:18,734 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:27:18,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:18,735 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:18,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:18,735 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:27:18,735 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:27:18,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:18,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:27:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-04 09:27:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:18,809 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-04 09:27:18,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:18,809 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:18,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:18,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:18,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:18,810 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:18,810 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:18,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:18,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2008109190, now seen corresponding path program 105 times [2018-10-04 09:27:18,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:18,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:18,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:18,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:18,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:18,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:18,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:18,902 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:18,909 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 09:27:18,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:18,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:18,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:18,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:18,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:18,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:18,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:18,934 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-04 09:27:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:19,089 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:27:19,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:19,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:19,090 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:27:19,090 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:27:19,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:27:19,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-10-04 09:27:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:19,158 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:19,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:19,158 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:19,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:19,158 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:19,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:19,158 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:19,158 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:19,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:19,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2006264070, now seen corresponding path program 106 times [2018-10-04 09:27:19,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:19,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:19,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:19,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:19,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:19,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:19,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:19,236 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:19,240 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:19,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:19,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:19,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:19,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:19,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:19,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:19,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:19,264 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:19,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:19,405 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:19,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:19,406 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:19,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:19,406 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:19,406 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:19,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:19,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-04 09:27:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:19,477 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-04 09:27:19,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:19,478 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:19,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:19,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:19,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:19,478 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-04 09:27:19,478 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:19,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:19,478 INFO L82 PathProgramCache]: Analyzing trace with hash -2006262148, now seen corresponding path program 107 times [2018-10-04 09:27:19,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:19,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:19,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:19,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:19,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:19,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:19,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:19,557 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:19,569 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:27:19,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:19,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:19,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:19,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:19,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:19,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:19,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:19,594 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-04 09:27:19,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:19,733 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:27:19,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:19,734 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:19,734 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:27:19,734 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:27:19,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:19,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:27:19,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-10-04 09:27:19,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:27:19,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:27:19,789 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-04 09:27:19,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:19,789 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:27:19,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:19,790 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:27:19,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:19,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:19,790 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-04 09:27:19,790 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:19,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:19,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1191907192, now seen corresponding path program 108 times [2018-10-04 09:27:19,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:19,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:19,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:19,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:19,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:19,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:19,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:19,850 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:19,860 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:27:19,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:19,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:19,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:19,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:19,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:19,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:19,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:19,883 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-04 09:27:20,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:20,024 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:27:20,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:20,024 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:20,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:20,025 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:27:20,025 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:27:20,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:20,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:27:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-10-04 09:27:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:20,098 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-04 09:27:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:20,098 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:20,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:20,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:20,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:20,099 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:20,099 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:20,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:20,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1191909114, now seen corresponding path program 109 times [2018-10-04 09:27:20,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:20,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:20,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:20,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:20,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:20,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:20,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:20,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:20,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:20,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:20,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:20,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:20,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:20,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:20,276 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-04 09:27:20,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:20,404 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:27:20,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:20,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:20,405 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:27:20,405 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:27:20,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:20,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:27:20,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-04 09:27:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:20,495 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:20,495 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:20,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:20,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:20,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:20,496 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:20,496 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:20,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:20,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1193754234, now seen corresponding path program 110 times [2018-10-04 09:27:20,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:20,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:20,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:20,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:20,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:20,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:20,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:20,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:20,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:20,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:20,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:20,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:20,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:20,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:20,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:20,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:20,771 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:20,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:20,904 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:27:20,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:20,905 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:20,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:20,905 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:27:20,905 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:27:20,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:20,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:27:20,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-10-04 09:27:20,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:20,981 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-04 09:27:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:20,981 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:20,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:20,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:20,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:20,981 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-04 09:27:20,981 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:20,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:20,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1193756156, now seen corresponding path program 111 times [2018-10-04 09:27:20,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:20,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:20,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:20,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:20,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:21,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:21,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:21,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:21,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 09:27:21,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:21,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:21,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:21,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:21,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:21,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:21,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:21,114 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-04 09:27:21,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:21,242 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:27:21,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:21,243 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:21,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:21,243 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:27:21,243 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:27:21,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:21,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:27:21,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-10-04 09:27:21,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:21,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:21,340 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-04 09:27:21,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:21,340 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:21,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:21,340 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:21,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:21,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:21,341 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-04 09:27:21,341 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:21,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:21,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1328052742, now seen corresponding path program 112 times [2018-10-04 09:27:21,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:21,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:21,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:21,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:21,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:21,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:21,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:21,664 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:21,669 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:21,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:21,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:21,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:21,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:21,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:21,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:21,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:21,693 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-04 09:27:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:21,824 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-04 09:27:21,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:21,825 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:21,825 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:27:21,826 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:27:21,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:27:21,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-10-04 09:27:21,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:21,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:21,903 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-04 09:27:21,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:21,903 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:21,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:21,903 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:21,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:21,904 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:21,904 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-04 09:27:21,904 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:21,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:21,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1328050820, now seen corresponding path program 113 times [2018-10-04 09:27:21,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:21,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:21,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:21,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:21,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:21,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:21,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:21,968 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:21,977 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:27:21,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:21,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:22,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:22,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:22,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:22,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:22,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:22,001 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-04 09:27:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:22,152 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-04 09:27:22,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:22,152 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:22,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:22,153 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:27:22,153 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:27:22,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:22,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:27:22,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2018-10-04 09:27:22,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:22,225 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-04 09:27:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:22,226 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:22,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:22,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:22,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:22,226 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-04 09:27:22,226 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:22,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:22,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1326205700, now seen corresponding path program 114 times [2018-10-04 09:27:22,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:22,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:22,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:22,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:22,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:22,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:22,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:22,299 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:22,312 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:27:22,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:22,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:22,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:22,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:22,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:22,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:22,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:22,336 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-04 09:27:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:22,447 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-04 09:27:22,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:22,447 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:22,447 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:27:22,447 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:27:22,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:22,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:27:22,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-10-04 09:27:22,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:22,527 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-04 09:27:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:22,527 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:22,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:22,528 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:22,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:22,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:22,528 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-10-04 09:27:22,528 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:22,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:22,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1326203778, now seen corresponding path program 6 times [2018-10-04 09:27:22,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:22,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:22,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:22,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:22,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:22,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:22,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:22,657 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:22,667 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:27:22,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:22,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:22,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:22,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:27:22,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:27:22,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:27:22,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:22,697 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-04 09:27:22,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:22,849 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2018-10-04 09:27:22,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:22,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-04 09:27:22,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:22,850 INFO L225 Difference]: With dead ends: 32 [2018-10-04 09:27:22,850 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 09:27:22,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:27:22,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 09:27:22,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2018-10-04 09:27:22,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:27:22,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-04 09:27:22,931 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-10-04 09:27:22,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:22,931 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-04 09:27:22,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:27:22,931 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-04 09:27:22,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:22,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:22,932 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-10-04 09:27:22,932 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:22,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:22,933 INFO L82 PathProgramCache]: Analyzing trace with hash -168156555, now seen corresponding path program 7 times [2018-10-04 09:27:22,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:22,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:22,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:22,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:22,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:23,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:23,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:23,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:23,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:23,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:23,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:23,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:23,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:23,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:23,185 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 10 states. [2018-10-04 09:27:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:23,400 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:27:23,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:23,401 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:23,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:23,402 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:27:23,402 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:27:23,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:23,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:27:23,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-04 09:27:23,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:23,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:23,496 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:23,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:23,496 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:23,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:23,496 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:23,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:23,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:23,497 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-04 09:27:23,497 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:23,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:23,497 INFO L82 PathProgramCache]: Analyzing trace with hash -168154633, now seen corresponding path program 115 times [2018-10-04 09:27:23,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:23,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:23,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:23,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:23,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:23,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:23,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:23,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:23,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:23,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:23,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:23,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:23,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:23,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:23,615 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:23,824 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:27:23,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:23,825 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:23,825 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:27:23,825 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:27:23,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:23,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:27:23,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-04 09:27:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:23,930 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:23,930 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:23,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:23,930 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:23,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:23,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:23,930 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-04 09:27:23,931 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:23,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:23,931 INFO L82 PathProgramCache]: Analyzing trace with hash -166309513, now seen corresponding path program 116 times [2018-10-04 09:27:23,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:23,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:23,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:23,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:23,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:23,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:23,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:24,004 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:24,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:24,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:24,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:24,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:24,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:24,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:24,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:24,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:24,036 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:24,251 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:27:24,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:24,252 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:24,252 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:27:24,252 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:27:24,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:24,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:27:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-04 09:27:24,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:24,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:24,347 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:24,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:24,347 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:24,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:24,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:24,347 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:24,347 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:24,348 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:24,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:24,348 INFO L82 PathProgramCache]: Analyzing trace with hash -166307591, now seen corresponding path program 117 times [2018-10-04 09:27:24,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:24,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:24,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:24,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:24,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:24,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:24,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:24,443 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:24,452 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:27:24,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:24,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:24,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:24,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:24,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:24,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:24,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:24,479 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:24,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:24,681 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:27:24,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:24,682 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:24,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:24,682 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:27:24,682 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:27:24,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:24,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:27:24,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-04 09:27:24,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:24,761 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-04 09:27:24,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:24,761 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:24,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:24,761 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:24,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:24,762 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-04 09:27:24,762 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:24,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:24,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1606850807, now seen corresponding path program 118 times [2018-10-04 09:27:24,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:24,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:24,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:24,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:24,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:24,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:24,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:24,829 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:24,836 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:24,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:24,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:24,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:24,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:24,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:24,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:24,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:24,862 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-04 09:27:25,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:25,069 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:27:25,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:25,070 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:25,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:25,070 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:27:25,070 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:27:25,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:27:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-04 09:27:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:25,162 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:25,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:25,162 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:25,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:25,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:25,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:25,163 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:25,163 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:25,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:25,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1606852729, now seen corresponding path program 119 times [2018-10-04 09:27:25,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:25,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:25,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:25,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:25,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:25,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:25,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:25,271 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:25,280 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:27:25,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:25,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:25,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:25,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:25,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:25,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:25,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:25,305 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:25,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:25,519 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:27:25,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:25,520 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:25,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:25,520 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:27:25,520 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:27:25,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:25,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:27:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-04 09:27:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:25,609 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:25,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:25,609 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:25,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:25,609 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:25,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:25,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:25,610 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:25,610 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:25,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:25,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1608697849, now seen corresponding path program 120 times [2018-10-04 09:27:25,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:25,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:25,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:25,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:25,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:25,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:25,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:25,780 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:25,788 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:27:25,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:25,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:25,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:25,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:25,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:25,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:25,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:25,813 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:25,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:25,998 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:27:25,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:25,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:25,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:25,999 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:25,999 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:27:25,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:26,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:27:26,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-04 09:27:26,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:26,096 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:26,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:26,096 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:26,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:26,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:26,096 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:26,097 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:26,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:26,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1608699771, now seen corresponding path program 121 times [2018-10-04 09:27:26,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:26,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:26,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:26,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:26,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:26,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:26,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:26,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:26,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:26,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:26,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:26,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:26,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:26,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:26,196 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:26,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:26,382 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:27:26,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:26,383 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:26,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:26,383 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:27:26,383 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:27:26,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:26,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:27:26,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-10-04 09:27:26,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:26,458 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-04 09:27:26,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:26,458 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:26,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:26,458 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:26,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:26,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:26,459 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-04 09:27:26,459 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:26,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:26,459 INFO L82 PathProgramCache]: Analyzing trace with hash 511901815, now seen corresponding path program 122 times [2018-10-04 09:27:26,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:26,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:26,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:26,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:26,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:26,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:26,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:26,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:26,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:26,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:26,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:26,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:26,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:26,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:26,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:26,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:26,575 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-04 09:27:26,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:26,814 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:27:26,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:26,815 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:26,815 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:27:26,815 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:27:26,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:27:26,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-04 09:27:26,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:26,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:26,910 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:26,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:26,910 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:26,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:26,911 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:26,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:26,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:26,911 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:26,911 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:26,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:26,911 INFO L82 PathProgramCache]: Analyzing trace with hash 511903737, now seen corresponding path program 123 times [2018-10-04 09:27:26,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:26,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:26,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:26,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:26,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:26,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:26,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:26,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:27,005 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:27:27,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:27,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:27,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:27,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:27,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:27,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:27,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:27,040 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:27,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:27,758 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:27:27,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:27,759 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:27,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:27,759 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:27:27,759 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:27:27,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:27,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:27:27,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-04 09:27:27,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:27,847 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:27,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:27,847 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:27,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:27,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:27,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:27,848 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:27,848 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:27,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:27,848 INFO L82 PathProgramCache]: Analyzing trace with hash 513748857, now seen corresponding path program 124 times [2018-10-04 09:27:27,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:27,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:27,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:27,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:27,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:27,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:27,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:27,945 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:27,951 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:27,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:27,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:27,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:27,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:27,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:27,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:27,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:27,975 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:28,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:28,198 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:27:28,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:28,198 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:28,199 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:27:28,199 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:27:28,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:28,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:27:28,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-04 09:27:28,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:28,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:28,290 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:28,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:28,291 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:28,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:28,291 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:28,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:28,291 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:28,291 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:28,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:28,291 INFO L82 PathProgramCache]: Analyzing trace with hash 513750779, now seen corresponding path program 125 times [2018-10-04 09:27:28,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:28,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:28,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:28,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:28,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:28,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:28,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:28,356 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:28,368 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:27:28,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:28,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:28,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:28,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:28,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:28,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:28,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:28,393 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:28,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:28,614 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:27:28,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:28,615 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:28,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:28,615 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:27:28,615 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:27:28,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:27:28,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-04 09:27:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:28,695 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-04 09:27:28,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:28,696 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:28,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:28,696 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:28,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:28,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:28,696 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:28,696 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:28,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:28,696 INFO L82 PathProgramCache]: Analyzing trace with hash -2008058119, now seen corresponding path program 126 times [2018-10-04 09:27:28,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:28,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:28,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:28,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:28,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:28,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:28,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:28,901 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:28,912 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:27:28,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:28,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:28,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:28,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:28,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:28,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:28,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:28,941 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-04 09:27:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:29,143 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:27:29,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:29,144 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:29,144 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:27:29,144 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:27:29,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:29,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:27:29,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-04 09:27:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:29,237 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:29,237 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:29,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:29,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:29,238 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:29,238 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:29,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:29,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2008056197, now seen corresponding path program 127 times [2018-10-04 09:27:29,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:29,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:29,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:29,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:29,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:29,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:29,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:29,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:29,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:29,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:29,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:29,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:29,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:29,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:29,519 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:29,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:29,723 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:27:29,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:29,724 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:29,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:29,724 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:27:29,724 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:27:29,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:29,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:27:29,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-04 09:27:29,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:29,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:29,821 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:29,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:29,821 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:29,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:29,822 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:29,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:29,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:29,822 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:29,822 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:29,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:29,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2006211077, now seen corresponding path program 128 times [2018-10-04 09:27:29,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:29,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:29,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:29,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:29,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:29,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:29,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:29,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:29,903 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:29,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:29,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:29,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:29,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:29,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:29,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:29,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:29,928 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:30,142 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:27:30,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:30,142 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:30,143 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:30,143 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:27:30,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:27:30,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-04 09:27:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:30,244 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:30,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:30,244 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:30,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:30,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:30,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:30,245 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:30,245 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:30,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:30,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2006209155, now seen corresponding path program 129 times [2018-10-04 09:27:30,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:30,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:30,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:30,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:30,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:30,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:30,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:30,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:30,329 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:27:30,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:30,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:30,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:30,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:30,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:30,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:30,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:30,354 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:30,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:30,556 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:27:30,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:30,556 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:30,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:30,557 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:27:30,557 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:27:30,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:30,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:27:30,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-10-04 09:27:30,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:27:30,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:27:30,632 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-10-04 09:27:30,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:30,633 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:27:30,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:30,633 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:27:30,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:30,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:30,633 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-04 09:27:30,633 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:30,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:30,633 INFO L82 PathProgramCache]: Analyzing trace with hash 532908023, now seen corresponding path program 130 times [2018-10-04 09:27:30,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:30,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:30,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:30,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:30,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:30,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:30,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:30,774 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:30,780 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:30,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:30,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:30,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:30,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:30,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:30,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:30,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:30,804 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-10-04 09:27:31,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:31,009 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:27:31,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:31,010 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:31,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:31,010 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:31,010 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:27:31,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:31,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:27:31,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-04 09:27:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:31,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:31,110 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:31,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:31,111 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:31,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:31,111 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:31,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:31,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:31,111 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:31,111 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:31,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:31,111 INFO L82 PathProgramCache]: Analyzing trace with hash 532909945, now seen corresponding path program 131 times [2018-10-04 09:27:31,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:31,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:31,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:31,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:31,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:31,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:31,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:31,200 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:31,210 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:27:31,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:31,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:31,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:31,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:31,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:31,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:31,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:31,240 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:31,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:31,451 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:27:31,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:31,452 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:31,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:31,452 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:31,452 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:27:31,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:31,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:27:31,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-04 09:27:31,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:31,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:31,571 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:31,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:31,571 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:31,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:31,572 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:31,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:31,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:31,572 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:31,572 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:31,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:31,572 INFO L82 PathProgramCache]: Analyzing trace with hash 534755065, now seen corresponding path program 132 times [2018-10-04 09:27:31,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:31,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:31,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:31,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:31,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:31,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:31,629 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:31,638 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:31,649 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:27:31,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:31,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:31,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:31,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:31,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:31,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:31,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:31,673 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:31,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:31,875 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:27:31,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:31,876 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:31,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:31,876 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:27:31,876 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:27:31,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:27:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-04 09:27:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:31,995 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:31,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:31,995 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:31,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:31,995 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:31,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:31,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:31,996 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:31,996 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:31,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:31,996 INFO L82 PathProgramCache]: Analyzing trace with hash 534756987, now seen corresponding path program 133 times [2018-10-04 09:27:31,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:31,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:31,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:31,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:31,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:32,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:32,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:32,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:32,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:32,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:32,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:32,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:32,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:32,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:32,093 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:32,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:32,285 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:32,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:32,285 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:32,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:32,286 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:32,286 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:32,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:32,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-04 09:27:32,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:32,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:32,373 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-04 09:27:32,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:32,373 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:32,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:32,374 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:32,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:32,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:32,374 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:32,374 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:32,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:32,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1987051911, now seen corresponding path program 134 times [2018-10-04 09:27:32,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:32,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:32,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:32,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:32,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:32,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:32,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:32,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:32,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:32,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:32,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:32,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:32,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:32,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:32,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:32,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:32,482 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-04 09:27:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:32,688 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:27:32,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:32,689 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:32,689 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:32,689 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:27:32,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:27:32,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-04 09:27:32,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:32,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:32,791 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:32,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:32,791 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:32,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:32,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:32,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:32,792 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:32,792 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:32,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:32,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1987049989, now seen corresponding path program 135 times [2018-10-04 09:27:32,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:32,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:32,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:32,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:32,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:32,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:32,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:32,935 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:32,945 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:27:32,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:32,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:32,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:32,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:32,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:32,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:32,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:32,970 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:33,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:33,189 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:27:33,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:33,190 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:33,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:33,190 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:33,190 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:27:33,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:27:33,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-04 09:27:33,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:33,298 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:33,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:33,298 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:33,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:33,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:33,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:33,298 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:33,299 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:33,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:33,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1985204869, now seen corresponding path program 136 times [2018-10-04 09:27:33,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:33,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:33,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:33,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:33,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:33,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:33,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:33,369 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:33,375 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:33,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:33,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:33,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:33,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:33,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:33,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:33,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:33,400 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:33,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:33,609 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:27:33,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:33,610 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:33,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:33,610 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:27:33,610 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:27:33,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:27:33,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-04 09:27:33,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:33,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:33,717 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:33,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:33,717 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:33,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:33,717 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:33,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:33,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:33,717 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:33,717 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:33,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:33,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1985202947, now seen corresponding path program 137 times [2018-10-04 09:27:33,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:33,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:33,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:33,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:33,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:33,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:33,778 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:33,787 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:33,794 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:27:33,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:33,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:33,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:33,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:33,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:33,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:33,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:33,819 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:34,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:34,021 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:34,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:34,022 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:34,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:34,022 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:34,022 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:34,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:34,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:34,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-04 09:27:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:34,109 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-04 09:27:34,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:34,109 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:34,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:34,109 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:34,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:34,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:34,110 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:34,110 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:34,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:34,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1212966393, now seen corresponding path program 138 times [2018-10-04 09:27:34,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:34,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:34,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:34,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:34,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:34,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:34,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:34,234 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:34,243 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:27:34,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:34,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:34,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:34,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:34,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:34,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:34,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:34,268 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-04 09:27:34,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:34,466 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:34,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:34,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:34,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:34,467 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:34,467 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:34,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:34,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-04 09:27:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:34,575 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:34,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:34,575 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:34,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:34,575 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:34,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:34,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:34,575 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:34,576 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:34,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:34,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1212968315, now seen corresponding path program 139 times [2018-10-04 09:27:34,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:34,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:34,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:34,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:34,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:34,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:34,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:34,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:34,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:34,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:34,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:34,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:34,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:34,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:34,727 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:34,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:34,914 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:27:34,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:34,914 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:34,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:34,915 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:27:34,915 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:27:34,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:34,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:27:35,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-10-04 09:27:35,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:35,031 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:35,031 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:35,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:35,031 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:35,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:35,031 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:35,031 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:35,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:35,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1214813435, now seen corresponding path program 140 times [2018-10-04 09:27:35,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:35,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:35,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:35,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:35,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:35,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:35,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:35,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:35,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:35,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:35,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:35,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:35,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:35,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:35,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:35,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:35,147 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:35,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:35,378 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:35,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:35,379 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:35,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:35,379 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:35,379 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:35,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:35,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-04 09:27:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:35,493 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:35,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:35,493 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:35,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:35,494 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:35,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:35,494 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:35,494 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:35,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:35,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1214815357, now seen corresponding path program 141 times [2018-10-04 09:27:35,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:35,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:35,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:35,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:35,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:35,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:35,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:35,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:35,573 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:27:35,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:35,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:35,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:35,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:35,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:35,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:35,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:35,598 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:35,808 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:27:35,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:35,808 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:35,809 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:27:35,809 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:27:35,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:35,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:27:35,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-04 09:27:35,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:35,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:35,915 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-04 09:27:35,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:35,915 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:35,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:35,915 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:35,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:35,916 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:35,916 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:35,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:35,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1306993541, now seen corresponding path program 142 times [2018-10-04 09:27:35,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:35,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:35,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:35,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:35,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:35,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:35,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:35,989 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:35,995 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:35,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:35,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:36,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:36,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:36,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:36,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:36,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:36,018 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-04 09:27:36,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:36,209 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:27:36,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:36,210 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:36,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:36,210 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:27:36,210 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:27:36,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:36,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:27:36,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-10-04 09:27:36,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:36,320 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:36,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:36,321 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:36,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:36,321 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:36,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:36,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:36,321 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:36,321 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:36,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:36,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1306991619, now seen corresponding path program 143 times [2018-10-04 09:27:36,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:36,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:36,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:36,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:36,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:36,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:36,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:36,455 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:36,465 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:27:36,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:36,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:36,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:36,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:36,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:36,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:36,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:36,490 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:36,668 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:27:36,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:36,669 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:36,669 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:27:36,669 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:27:36,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:36,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:27:36,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-10-04 09:27:36,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:36,780 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:36,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:36,780 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:36,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:36,780 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:36,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:36,781 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:36,781 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:36,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:36,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1305146499, now seen corresponding path program 144 times [2018-10-04 09:27:36,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:36,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:36,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:36,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:36,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:36,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:36,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:36,924 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:36,932 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:27:36,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:36,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:36,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:36,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:36,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:36,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:36,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:36,958 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:37,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:37,136 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-04 09:27:37,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:37,136 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:37,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:37,137 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:27:37,137 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:27:37,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:37,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:27:37,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-10-04 09:27:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:37,240 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:37,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:37,240 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:37,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:37,240 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:37,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:37,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:37,240 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:37,240 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:37,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:37,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1305144577, now seen corresponding path program 145 times [2018-10-04 09:27:37,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:37,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:37,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:37,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:37,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:37,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:37,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:37,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:37,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:37,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:37,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:37,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:37,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:37,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:37,352 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:37,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:37,505 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-10-04 09:27:37,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:37,506 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:37,506 INFO L225 Difference]: With dead ends: 34 [2018-10-04 09:27:37,506 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 09:27:37,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 09:27:37,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-10-04 09:27:37,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:27:37,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-04 09:27:37,579 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-10-04 09:27:37,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:37,579 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-04 09:27:37,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:37,579 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-04 09:27:37,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:37,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:37,580 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-04 09:27:37,580 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:37,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:37,580 INFO L82 PathProgramCache]: Analyzing trace with hash -754962569, now seen corresponding path program 146 times [2018-10-04 09:27:37,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:37,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:37,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:37,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:37,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:37,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:37,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:37,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:37,655 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:37,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:37,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:37,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:37,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:37,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:37,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:37,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:37,689 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-10-04 09:27:38,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:38,010 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:27:38,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:38,011 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:38,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:38,011 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:27:38,011 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:27:38,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:27:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-04 09:27:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:38,128 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:38,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:38,128 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:38,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:38,128 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:38,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:38,128 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:38,128 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:38,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:38,128 INFO L82 PathProgramCache]: Analyzing trace with hash -754960647, now seen corresponding path program 147 times [2018-10-04 09:27:38,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:38,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:38,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:38,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:38,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:38,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:38,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:38,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:38,225 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:27:38,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:38,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:38,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:38,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:38,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:38,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:38,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:38,250 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:38,523 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:27:38,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:38,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:38,524 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:27:38,524 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:27:38,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:38,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:27:38,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-04 09:27:38,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:38,649 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:38,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:38,649 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:38,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:38,649 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:38,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:38,649 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:38,650 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:38,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:38,650 INFO L82 PathProgramCache]: Analyzing trace with hash -753115527, now seen corresponding path program 148 times [2018-10-04 09:27:38,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:38,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:38,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:38,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:38,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:38,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:38,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:38,720 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:38,726 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:38,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:38,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:38,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:38,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:38,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:38,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:38,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:38,750 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:39,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:39,025 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:27:39,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:39,025 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:39,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:39,026 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:27:39,026 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:27:39,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:39,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:27:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-04 09:27:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:39,153 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:39,153 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:39,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:39,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:39,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:39,153 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:39,154 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:39,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:39,154 INFO L82 PathProgramCache]: Analyzing trace with hash -753113605, now seen corresponding path program 149 times [2018-10-04 09:27:39,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:39,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:39,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:39,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:39,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:39,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:39,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:39,324 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:39,331 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:27:39,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:39,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:39,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:39,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:39,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:39,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:39,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:39,355 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:39,621 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:27:39,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:39,621 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:39,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:39,622 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:27:39,622 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:27:39,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:39,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:27:39,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-04 09:27:39,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:39,729 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-04 09:27:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:39,729 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:39,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:39,729 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:39,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:39,729 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:39,729 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:39,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:39,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1020044793, now seen corresponding path program 150 times [2018-10-04 09:27:39,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:39,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:39,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:39,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:39,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:39,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:39,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:39,815 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:39,824 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:27:39,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:39,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:39,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:39,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:39,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:39,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:39,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:39,854 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-04 09:27:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:40,102 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:27:40,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:40,103 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:40,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:40,103 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:27:40,103 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:27:40,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:40,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:27:40,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-04 09:27:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:40,224 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:40,224 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:40,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:40,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:40,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:40,225 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:40,225 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:40,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:40,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1020046715, now seen corresponding path program 151 times [2018-10-04 09:27:40,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:40,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:40,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:40,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:40,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:40,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:40,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:40,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:40,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:40,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:40,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:40,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:40,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:40,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:40,324 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:40,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:40,581 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:27:40,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:40,582 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:40,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:40,582 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:27:40,582 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:27:40,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:40,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:27:40,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-04 09:27:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:40,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:40,709 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:40,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:40,709 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:40,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:40,709 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:40,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:40,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:40,710 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:40,710 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:40,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:40,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1021891835, now seen corresponding path program 152 times [2018-10-04 09:27:40,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:40,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:40,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:40,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:40,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:40,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:40,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:40,780 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:40,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:40,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:40,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:40,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:40,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:40,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:40,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:40,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:40,811 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:41,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:41,041 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:27:41,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:41,042 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:41,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:41,042 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:41,042 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:27:41,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:41,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:27:41,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-04 09:27:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:41,166 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:41,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:41,166 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:41,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:41,167 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:41,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:41,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:41,167 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:41,167 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:41,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:41,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1021893757, now seen corresponding path program 153 times [2018-10-04 09:27:41,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:41,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:41,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:41,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:41,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:41,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:41,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:41,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:41,252 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:27:41,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:41,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:41,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:41,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:41,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:41,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:41,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:41,277 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:41,508 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:27:41,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:41,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:41,509 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:27:41,509 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:27:41,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:41,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:27:41,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-10-04 09:27:41,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:41,607 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-04 09:27:41,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:41,607 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:41,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:41,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:41,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:41,607 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:41,607 INFO L423 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:41,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:41,608 INFO L82 PathProgramCache]: Analyzing trace with hash -74904199, now seen corresponding path program 154 times [2018-10-04 09:27:41,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:41,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:41,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:41,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:41,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:41,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:41,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:41,677 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:41,700 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:41,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:41,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:41,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:41,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:41,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:41,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:41,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:41,723 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-04 09:27:42,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:42,015 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:27:42,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:42,015 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:42,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:42,016 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:27:42,016 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:27:42,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:42,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:27:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-04 09:27:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:42,141 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:42,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:42,141 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:42,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:42,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:42,141 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:42,142 INFO L423 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:42,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:42,142 INFO L82 PathProgramCache]: Analyzing trace with hash -74902277, now seen corresponding path program 155 times [2018-10-04 09:27:42,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:42,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:42,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:42,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:42,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:42,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:42,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:42,210 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:42,219 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:27:42,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:42,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:42,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:42,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:42,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:42,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:42,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:42,243 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:42,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:42,528 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:27:42,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:42,529 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:42,529 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:27:42,529 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:27:42,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:42,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:27:42,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-04 09:27:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:42,660 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:42,660 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:42,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:42,660 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:42,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:42,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:42,661 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:42,661 INFO L423 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:42,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash -73057157, now seen corresponding path program 156 times [2018-10-04 09:27:42,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:42,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:42,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:42,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:42,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:42,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:42,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:42,753 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:42,762 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:27:42,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:42,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:42,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:42,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:42,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:42,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:42,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:42,792 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:43,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:43,086 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:27:43,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:43,086 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:43,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:43,086 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:27:43,086 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:27:43,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:27:43,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-04 09:27:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:43,221 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:43,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:43,221 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:43,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:43,221 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:43,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:43,221 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:43,221 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:43,221 INFO L423 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:43,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:43,222 INFO L82 PathProgramCache]: Analyzing trace with hash -73055235, now seen corresponding path program 157 times [2018-10-04 09:27:43,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:43,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:43,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:43,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:43,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:43,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:43,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:43,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:43,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:43,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:43,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:43,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:43,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:43,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:43,353 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:43,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:43,628 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:27:43,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:43,628 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:43,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:43,629 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:27:43,629 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:27:43,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:27:43,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-04 09:27:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:43,741 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-04 09:27:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:43,741 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:43,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:43,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:43,742 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:43,742 INFO L423 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:43,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:43,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1700103163, now seen corresponding path program 158 times [2018-10-04 09:27:43,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:43,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:43,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:43,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:43,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:43,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:43,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:43,814 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:43,821 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:43,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:43,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:43,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:43,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:43,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:43,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:43,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:43,845 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-04 09:27:44,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:44,109 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:27:44,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:44,109 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:44,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:44,110 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:27:44,110 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:27:44,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:44,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:27:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-04 09:27:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:44,246 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:44,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:44,246 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:44,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:44,246 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:44,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:44,247 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:44,247 INFO L423 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:44,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:44,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1700105085, now seen corresponding path program 159 times [2018-10-04 09:27:44,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:44,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:44,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:44,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:44,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:44,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:44,309 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:44,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:44,325 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:27:44,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:44,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:44,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:44,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:44,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:44,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:44,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:44,353 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:44,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:44,618 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:27:44,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:44,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:44,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:44,619 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:27:44,619 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:27:44,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:44,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:27:44,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-04 09:27:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:44,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:44,750 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:44,750 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:44,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:44,750 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:44,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:44,750 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:44,750 INFO L423 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:44,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:44,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1701950205, now seen corresponding path program 160 times [2018-10-04 09:27:44,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:44,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:44,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:44,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:44,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:44,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:44,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:44,818 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:44,823 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:44,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:44,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:44,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:44,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:44,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:44,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:44,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:44,848 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:45,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:45,104 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:27:45,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:45,105 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:45,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:45,105 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:45,105 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:27:45,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:45,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:27:45,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-04 09:27:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:45,230 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:45,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:45,230 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:45,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:45,230 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:45,231 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:45,231 INFO L423 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:45,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:45,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1701952127, now seen corresponding path program 161 times [2018-10-04 09:27:45,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:45,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:45,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:45,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:45,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:45,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:45,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:45,354 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:45,380 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:27:45,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:45,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:45,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:45,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:45,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:45,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:45,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:45,404 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:45,819 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:27:45,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:45,819 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:45,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:45,820 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:27:45,820 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:27:45,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:45,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:27:45,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-10-04 09:27:45,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:27:45,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:27:45,984 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-10-04 09:27:45,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:45,985 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:27:45,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:27:45,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:45,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:45,985 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:45,986 INFO L423 AbstractCegarLoop]: === Iteration 176 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:45,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:45,986 INFO L82 PathProgramCache]: Analyzing trace with hash -53897991, now seen corresponding path program 162 times [2018-10-04 09:27:45,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:45,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:45,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:45,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:45,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:46,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:46,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:46,981 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:47,090 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:27:47,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:47,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:47,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:47,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:47,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:47,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:47,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:47,122 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-10-04 09:27:47,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:47,376 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:27:47,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:47,377 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:47,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:47,377 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:47,377 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:27:47,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:47,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:27:47,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-04 09:27:47,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:47,520 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:47,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:47,521 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:47,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:47,521 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:47,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:47,521 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:47,521 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:47,521 INFO L423 AbstractCegarLoop]: === Iteration 177 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:47,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:47,521 INFO L82 PathProgramCache]: Analyzing trace with hash -53896069, now seen corresponding path program 163 times [2018-10-04 09:27:47,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:47,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:47,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:47,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:47,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:47,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:47,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:47,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:47,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:47,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:47,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:47,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:47,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:47,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:47,618 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:47,902 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:27:47,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:47,902 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:47,903 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:47,903 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:27:47,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:47,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:27:48,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-04 09:27:48,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:48,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:48,061 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:48,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:48,061 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:48,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:48,061 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:48,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:48,061 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:48,062 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:48,062 INFO L423 AbstractCegarLoop]: === Iteration 178 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:48,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:48,062 INFO L82 PathProgramCache]: Analyzing trace with hash -52050949, now seen corresponding path program 164 times [2018-10-04 09:27:48,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:48,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:48,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:48,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:48,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:48,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:48,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:48,188 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:48,194 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:48,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:48,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:48,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:48,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:48,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:48,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:48,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:48,218 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:48,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:48,442 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:27:48,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:48,442 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:48,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:48,443 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:27:48,443 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:27:48,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:27:48,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-04 09:27:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:48,584 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:48,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:48,585 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:48,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:48,585 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:48,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:48,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:48,585 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:48,585 INFO L423 AbstractCegarLoop]: === Iteration 179 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:48,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:48,585 INFO L82 PathProgramCache]: Analyzing trace with hash -52049027, now seen corresponding path program 165 times [2018-10-04 09:27:48,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:48,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:48,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:48,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:48,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:48,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:48,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:48,654 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:48,663 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:27:48,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:48,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:48,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:48,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:48,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:48,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:48,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:48,688 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:48,930 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:48,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:48,931 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:48,931 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:48,931 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:48,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:48,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:49,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-04 09:27:49,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:49,049 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-04 09:27:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:49,049 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:49,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:49,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:49,050 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:49,050 INFO L423 AbstractCegarLoop]: === Iteration 180 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:49,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:49,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1721109371, now seen corresponding path program 166 times [2018-10-04 09:27:49,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:49,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:49,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:49,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:49,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:49,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:49,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:49,119 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:49,124 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:49,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:49,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:49,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:49,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:49,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:49,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:49,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:49,147 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-04 09:27:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:49,411 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:27:49,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:49,411 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:49,412 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:49,412 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:27:49,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:49,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:27:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-04 09:27:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:49,556 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:49,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:49,557 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:49,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:49,557 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:49,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:49,557 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:49,557 INFO L423 AbstractCegarLoop]: === Iteration 181 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:49,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:49,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1721111293, now seen corresponding path program 167 times [2018-10-04 09:27:49,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:49,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:49,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:49,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:49,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:49,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:49,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:49,627 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:49,641 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:27:49,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:49,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:49,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:49,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:49,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:49,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:49,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:49,666 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:49,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:49,943 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:27:49,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:49,943 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:49,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:49,944 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:49,944 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:27:49,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:49,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:27:50,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-04 09:27:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:50,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:50,077 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:50,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:50,077 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:50,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:50,077 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:50,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:50,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:50,077 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:50,078 INFO L423 AbstractCegarLoop]: === Iteration 182 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:50,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:50,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1722956413, now seen corresponding path program 168 times [2018-10-04 09:27:50,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:50,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:50,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:50,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:50,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:50,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:50,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:50,148 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:50,157 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:27:50,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:50,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:50,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:50,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:50,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:50,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:50,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:50,182 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:50,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:50,435 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:27:50,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:50,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:50,436 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:27:50,436 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:27:50,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:50,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:27:50,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-04 09:27:50,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:50,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:50,581 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:50,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:50,582 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:50,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:50,582 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:50,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:50,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:50,582 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:50,582 INFO L423 AbstractCegarLoop]: === Iteration 183 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:50,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:50,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1722958335, now seen corresponding path program 169 times [2018-10-04 09:27:50,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:50,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:50,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:50,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:50,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:50,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:50,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:50,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:50,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:50,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:50,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:50,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:50,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:50,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:50,685 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:50,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:50,932 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:50,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:50,933 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:50,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:50,933 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:50,933 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:50,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:50,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:51,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-04 09:27:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:51,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:27:51,039 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-04 09:27:51,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:51,039 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:27:51,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:51,039 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:27:51,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:51,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:51,039 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:51,039 INFO L423 AbstractCegarLoop]: === Iteration 184 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:51,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:51,040 INFO L82 PathProgramCache]: Analyzing trace with hash 626160379, now seen corresponding path program 170 times [2018-10-04 09:27:51,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:51,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:51,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:51,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:51,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:51,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:51,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:51,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:51,350 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:51,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:51,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:51,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:51,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:51,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:51,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:51,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:51,374 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-04 09:27:51,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:51,619 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:51,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:51,620 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:51,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:51,620 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:51,620 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:51,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:51,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:51,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-04 09:27:51,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:51,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:51,760 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:51,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:51,760 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:51,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:51,760 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:51,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:51,760 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:51,760 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:51,761 INFO L423 AbstractCegarLoop]: === Iteration 185 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:51,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:51,761 INFO L82 PathProgramCache]: Analyzing trace with hash 626162301, now seen corresponding path program 171 times [2018-10-04 09:27:51,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:51,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:51,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:51,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:51,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:51,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:51,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:51,832 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:51,841 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:27:51,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:51,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:51,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:51,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:51,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:51,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:51,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:51,866 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:52,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:52,116 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:27:52,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:52,117 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:52,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:52,117 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:27:52,117 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:27:52,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:52,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:27:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-10-04 09:27:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:52,259 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:52,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:52,259 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:52,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:52,259 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:52,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:52,260 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:52,260 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:52,260 INFO L423 AbstractCegarLoop]: === Iteration 186 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:52,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:52,260 INFO L82 PathProgramCache]: Analyzing trace with hash 628007421, now seen corresponding path program 172 times [2018-10-04 09:27:52,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:52,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:52,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:52,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:52,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:52,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:52,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:52,330 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:52,335 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:52,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:52,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:52,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:52,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:52,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:52,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:52,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:52,358 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:52,596 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:27:52,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:52,596 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:52,597 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:52,597 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:27:52,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:27:52,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-04 09:27:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:52,735 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:52,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:52,735 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:52,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:52,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:52,736 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:52,736 INFO L423 AbstractCegarLoop]: === Iteration 187 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:52,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:52,736 INFO L82 PathProgramCache]: Analyzing trace with hash 628009343, now seen corresponding path program 173 times [2018-10-04 09:27:52,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:52,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:52,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:52,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:52,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:52,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:52,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:52,810 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:52,819 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:27:52,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:52,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:52,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:52,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:52,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:52,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:52,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:52,844 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:53,069 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:27:53,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:53,070 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:53,070 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:27:53,070 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:27:53,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:27:53,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-04 09:27:53,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:53,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:27:53,204 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-04 09:27:53,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:53,205 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:27:53,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:27:53,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:53,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:53,205 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:53,205 INFO L423 AbstractCegarLoop]: === Iteration 188 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:53,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:53,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1893799555, now seen corresponding path program 174 times [2018-10-04 09:27:53,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:53,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:53,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:53,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:53,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:53,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:53,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:53,351 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:53,383 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:27:53,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:53,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:53,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:53,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:53,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:53,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:53,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:53,414 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-04 09:27:53,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:53,650 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:27:53,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:53,651 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:53,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:53,651 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:27:53,651 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:27:53,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:53,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:27:53,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-10-04 09:27:53,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:53,786 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:53,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:53,787 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:53,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:53,787 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:53,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:53,787 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:53,787 INFO L423 AbstractCegarLoop]: === Iteration 189 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:53,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:53,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1893797633, now seen corresponding path program 175 times [2018-10-04 09:27:53,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:53,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:53,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:53,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:53,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:53,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:53,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:53,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:53,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:53,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:53,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:53,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:53,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:53,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:53,888 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:54,124 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:27:54,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:54,124 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:54,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:54,124 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:27:54,124 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:27:54,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:27:54,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-10-04 09:27:54,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:54,267 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:54,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:54,267 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:54,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:54,268 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:54,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:54,268 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:54,268 INFO L423 AbstractCegarLoop]: === Iteration 190 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:54,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:54,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1891952513, now seen corresponding path program 176 times [2018-10-04 09:27:54,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:54,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:54,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:54,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:54,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:54,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:54,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:54,335 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:54,340 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:54,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:54,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:54,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:54,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:54,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:54,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:54,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:54,364 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:54,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:54,580 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-04 09:27:54,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:54,580 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:54,581 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:27:54,581 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:27:54,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:54,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:27:54,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-10-04 09:27:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:54,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:54,718 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:54,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:54,718 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:54,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:54,718 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:54,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:54,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:54,719 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-04 09:27:54,719 INFO L423 AbstractCegarLoop]: === Iteration 191 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:54,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:54,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1891950591, now seen corresponding path program 177 times [2018-10-04 09:27:54,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:54,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:54,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:54,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:54,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:54,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:54,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:54,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:54,803 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:27:54,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:54,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:54,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:54,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:54,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:54,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:54,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:54,830 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:55,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:55,023 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-10-04 09:27:55,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:55,024 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:55,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:55,024 INFO L225 Difference]: With dead ends: 34 [2018-10-04 09:27:55,024 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 09:27:55,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:55,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 09:27:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-10-04 09:27:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:27:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-04 09:27:55,110 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-10-04 09:27:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:55,110 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-04 09:27:55,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:55,110 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-04 09:27:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:55,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:55,110 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-04 09:27:55,110 INFO L423 AbstractCegarLoop]: === Iteration 192 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:55,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:55,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1448020233, now seen corresponding path program 178 times [2018-10-04 09:27:55,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:55,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:55,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:55,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:55,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:55,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:55,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:55,359 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:55,365 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:55,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:55,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:55,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:55,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:55,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:55,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:55,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:55,389 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-10-04 09:27:55,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:55,777 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-04 09:27:55,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:55,778 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:55,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:55,778 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:27:55,778 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:27:55,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:55,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:27:55,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-04 09:27:55,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:27:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:27:55,944 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:27:55,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:55,944 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:27:55,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:27:55,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:55,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:55,945 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:55,945 INFO L423 AbstractCegarLoop]: === Iteration 193 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:55,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:55,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1448018311, now seen corresponding path program 179 times [2018-10-04 09:27:55,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:55,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:55,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:55,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:55,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:56,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:56,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:56,022 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:56,029 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:27:56,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:56,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:56,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:56,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:56,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:56,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:56,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:56,055 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:27:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:56,476 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-04 09:27:56,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:56,477 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:56,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:56,477 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:27:56,477 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:27:56,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:56,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:27:56,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-04 09:27:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:56,649 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:56,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:56,650 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:56,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:56,650 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:56,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:56,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:56,650 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:56,650 INFO L423 AbstractCegarLoop]: === Iteration 194 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:56,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:56,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1446173191, now seen corresponding path program 180 times [2018-10-04 09:27:56,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:56,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:56,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:56,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:56,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:56,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:56,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:56,716 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:56,723 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:27:56,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:56,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:56,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:56,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:56,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:56,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:56,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:56,755 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:57,130 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:27:57,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:57,130 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:57,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:57,131 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:27:57,131 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:27:57,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:27:57,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-04 09:27:57,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:27:57,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:27:57,325 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:27:57,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:57,325 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:27:57,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:57,325 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:27:57,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:57,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:57,326 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:57,326 INFO L423 AbstractCegarLoop]: === Iteration 195 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:57,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:57,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1446171269, now seen corresponding path program 181 times [2018-10-04 09:27:57,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:57,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:57,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:57,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:57,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:57,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:57,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:57,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:57,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:57,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:57,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:57,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:57,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:57,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:57,491 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:27:57,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:57,857 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:27:57,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:57,863 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:57,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:57,863 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:27:57,863 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:27:57,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:57,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:27:58,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-10-04 09:27:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:27:58,022 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:27:58,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:58,022 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:27:58,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:27:58,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:58,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:58,023 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:27:58,023 INFO L423 AbstractCegarLoop]: === Iteration 196 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:58,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:58,023 INFO L82 PathProgramCache]: Analyzing trace with hash 326987129, now seen corresponding path program 182 times [2018-10-04 09:27:58,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:58,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:58,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:58,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:58,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:58,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:58,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:58,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:58,099 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:58,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:58,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:58,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:58,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:58,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:58,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:58,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:58,124 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:27:58,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:58,516 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-04 09:27:58,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:58,516 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:58,517 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:27:58,517 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:27:58,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:58,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:27:58,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-04 09:27:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:27:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:27:58,692 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:27:58,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:58,692 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:27:58,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:58,692 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:27:58,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:58,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:58,693 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:58,693 INFO L423 AbstractCegarLoop]: === Iteration 197 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:58,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:58,693 INFO L82 PathProgramCache]: Analyzing trace with hash 326989051, now seen corresponding path program 183 times [2018-10-04 09:27:58,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:58,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:58,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:58,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:58,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:58,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:58,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:58,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:58,777 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:27:58,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:58,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:58,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:58,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:58,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:58,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:58,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:58,801 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:27:59,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:59,196 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-04 09:27:59,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:59,196 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:59,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:59,197 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:27:59,197 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:27:59,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:59,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:27:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-04 09:27:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:59,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:27:59,360 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:27:59,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:59,361 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:27:59,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:59,361 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:27:59,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:59,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:59,361 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:27:59,361 INFO L423 AbstractCegarLoop]: === Iteration 198 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:59,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:59,361 INFO L82 PathProgramCache]: Analyzing trace with hash 328834171, now seen corresponding path program 184 times [2018-10-04 09:27:59,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:59,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:59,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:59,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:59,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:59,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:59,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:59,433 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:59,444 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:59,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:59,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:59,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:59,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:27:59,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:59,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:59,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:59,466 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:27:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:59,864 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:27:59,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:59,865 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:27:59,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:59,865 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:27:59,865 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:27:59,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:59,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:28:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-04 09:28:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:00,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:00,062 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:00,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:00,062 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:00,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:00,062 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:00,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:00,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:00,063 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:00,063 INFO L423 AbstractCegarLoop]: === Iteration 199 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:00,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:00,063 INFO L82 PathProgramCache]: Analyzing trace with hash 328836093, now seen corresponding path program 185 times [2018-10-04 09:28:00,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:00,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:00,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:00,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:00,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:00,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:00,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:00,136 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:00,147 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:28:00,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:00,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:00,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:00,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:00,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:00,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:00,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:00,170 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:00,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:00,550 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:28:00,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:00,551 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:00,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:00,551 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:28:00,551 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:28:00,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:00,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:28:00,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-10-04 09:28:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:28:00,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:28:00,689 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-04 09:28:00,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:00,689 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:28:00,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:00,689 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:28:00,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:00,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:00,689 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:00,690 INFO L423 AbstractCegarLoop]: === Iteration 200 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:00,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:00,690 INFO L82 PathProgramCache]: Analyzing trace with hash -767961863, now seen corresponding path program 186 times [2018-10-04 09:28:00,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:00,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:00,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:00,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:00,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:01,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:01,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:01,678 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:01,783 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:28:01,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:01,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:01,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:01,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:01,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:01,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:01,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:01,818 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-04 09:28:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:02,280 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:28:02,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:02,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:02,280 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:28:02,281 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:28:02,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:02,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:28:02,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-04 09:28:02,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:02,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:02,456 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:02,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:02,456 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:02,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:02,456 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:02,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:02,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:02,457 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:02,457 INFO L423 AbstractCegarLoop]: === Iteration 201 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:02,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:02,457 INFO L82 PathProgramCache]: Analyzing trace with hash -767959941, now seen corresponding path program 187 times [2018-10-04 09:28:02,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:02,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:02,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:02,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:02,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:02,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:02,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:02,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:02,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:02,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:02,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:02,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:02,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:02,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:02,556 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:02,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:02,966 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:28:02,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:02,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:02,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:02,967 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:28:02,967 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:28:02,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:02,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:28:03,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-04 09:28:03,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:28:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:28:03,130 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:28:03,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:03,130 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:28:03,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:28:03,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:03,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:03,130 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:03,130 INFO L423 AbstractCegarLoop]: === Iteration 202 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:03,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:03,131 INFO L82 PathProgramCache]: Analyzing trace with hash -766114821, now seen corresponding path program 188 times [2018-10-04 09:28:03,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:03,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:03,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:03,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:03,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:03,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:03,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:03,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:03,204 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:03,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:03,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:03,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:03,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:03,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:03,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:03,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:03,228 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:28:03,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:03,706 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:28:03,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:03,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:03,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:03,707 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:28:03,707 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:28:03,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:03,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:28:03,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-04 09:28:03,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:03,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:03,891 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:03,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:03,891 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:03,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:03,891 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:03,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:03,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:03,892 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:03,892 INFO L423 AbstractCegarLoop]: === Iteration 203 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:03,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:03,892 INFO L82 PathProgramCache]: Analyzing trace with hash -766112899, now seen corresponding path program 189 times [2018-10-04 09:28:03,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:03,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:03,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:03,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:03,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:03,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:03,957 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:03,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:03,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:28:03,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:03,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:04,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:04,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:04,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:04,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:04,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:04,011 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:04,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:04,375 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:28:04,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:04,376 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:04,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:04,376 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:28:04,376 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:28:04,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:04,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:28:04,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-10-04 09:28:04,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:28:04,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:28:04,545 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:28:04,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:04,545 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:28:04,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:04,545 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:28:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:04,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:04,546 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:04,546 INFO L423 AbstractCegarLoop]: === Iteration 204 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:04,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:04,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1007045499, now seen corresponding path program 190 times [2018-10-04 09:28:04,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:04,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:04,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:04,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:04,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:04,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:04,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:04,621 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:04,626 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:04,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:04,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:04,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:04,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:04,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:04,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:04,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:04,662 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:28:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:05,199 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:28:05,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:05,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:05,200 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:28:05,200 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:28:05,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:28:05,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-04 09:28:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:05,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:05,390 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:05,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:05,390 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:05,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:05,390 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:05,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:05,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:05,391 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:05,391 INFO L423 AbstractCegarLoop]: === Iteration 205 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:05,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:05,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1007047421, now seen corresponding path program 191 times [2018-10-04 09:28:05,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:05,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:05,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:05,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:05,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:05,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:05,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:05,464 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:05,473 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:28:05,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:05,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:05,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:05,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:05,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:05,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:05,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:05,497 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:05,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:05,852 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:28:05,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:05,853 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:05,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:05,853 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:28:05,853 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:28:05,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:05,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:28:06,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-04 09:28:06,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:28:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:28:06,019 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:28:06,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:06,019 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:28:06,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:06,019 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:28:06,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:06,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:06,019 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:06,019 INFO L423 AbstractCegarLoop]: === Iteration 206 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:06,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:06,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1008892541, now seen corresponding path program 192 times [2018-10-04 09:28:06,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:06,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:06,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:06,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:06,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:06,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:06,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:06,138 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:06,147 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:28:06,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:06,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:06,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:06,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:06,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:06,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:06,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:06,171 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:28:06,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:06,495 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:28:06,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:06,496 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:06,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:06,496 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:28:06,496 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:28:06,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:06,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:28:06,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-04 09:28:06,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:06,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:06,710 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:06,710 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:06,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:06,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:06,711 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:06,711 INFO L423 AbstractCegarLoop]: === Iteration 207 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:06,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:06,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1008894463, now seen corresponding path program 193 times [2018-10-04 09:28:06,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:06,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:06,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:06,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:06,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:06,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:06,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:06,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:06,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:06,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:06,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:06,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:06,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:06,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:06,836 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:07,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:07,141 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:28:07,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:07,142 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:07,142 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:28:07,142 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:28:07,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:28:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-10-04 09:28:07,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:28:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:28:07,278 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-04 09:28:07,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:07,278 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:28:07,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:07,279 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:28:07,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:07,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:07,279 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:07,279 INFO L423 AbstractCegarLoop]: === Iteration 208 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:07,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:07,279 INFO L82 PathProgramCache]: Analyzing trace with hash -746955655, now seen corresponding path program 194 times [2018-10-04 09:28:07,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:07,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:07,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:07,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:07,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:07,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:07,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:07,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:07,357 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:07,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:07,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:07,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:07,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:07,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:07,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:07,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:07,381 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-04 09:28:07,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:07,816 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-04 09:28:07,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:07,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:07,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:07,817 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:28:07,817 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:28:07,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:07,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:28:07,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-04 09:28:07,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:07,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:07,995 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:07,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:07,995 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:07,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:07,995 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:07,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:07,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:07,995 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:07,995 INFO L423 AbstractCegarLoop]: === Iteration 209 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:07,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:07,996 INFO L82 PathProgramCache]: Analyzing trace with hash -746953733, now seen corresponding path program 195 times [2018-10-04 09:28:07,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:07,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:07,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:07,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:07,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:08,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:08,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:08,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:08,092 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:28:08,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:08,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:08,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:08,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:08,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:08,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:08,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:08,116 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:08,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:08,547 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-04 09:28:08,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:08,548 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:08,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:08,548 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:28:08,548 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:28:08,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:28:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-04 09:28:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:28:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:28:08,720 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:28:08,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:08,720 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:28:08,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:28:08,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:08,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:08,721 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:08,721 INFO L423 AbstractCegarLoop]: === Iteration 210 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:08,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:08,721 INFO L82 PathProgramCache]: Analyzing trace with hash -745108613, now seen corresponding path program 196 times [2018-10-04 09:28:08,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:08,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:08,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:08,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:08,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:08,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:08,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:08,846 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:08,859 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:08,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:08,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:08,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:08,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:08,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:08,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:08,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:08,882 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:28:09,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:09,320 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:28:09,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:09,321 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:09,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:09,321 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:28:09,321 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:28:09,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:09,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:28:09,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-04 09:28:09,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:09,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:09,497 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:09,497 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:09,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:09,497 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:09,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:09,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:09,497 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:09,497 INFO L423 AbstractCegarLoop]: === Iteration 211 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:09,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:09,498 INFO L82 PathProgramCache]: Analyzing trace with hash -745106691, now seen corresponding path program 197 times [2018-10-04 09:28:09,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:09,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:09,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:09,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:09,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:09,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:09,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:09,569 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:09,577 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:28:09,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:09,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:09,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:09,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:09,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:09,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:09,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:09,601 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:09,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:09,999 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:28:09,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:10,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:10,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:10,000 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:28:10,000 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:28:10,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:10,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:28:10,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-10-04 09:28:10,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:28:10,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:28:10,163 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:28:10,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:10,163 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:28:10,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:10,163 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:28:10,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:10,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:10,163 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:10,164 INFO L423 AbstractCegarLoop]: === Iteration 212 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:10,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:10,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1028051707, now seen corresponding path program 198 times [2018-10-04 09:28:10,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:10,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:10,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:10,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:10,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:10,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:10,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:10,232 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:10,243 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:28:10,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:10,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:10,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:10,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:10,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:10,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:10,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:10,266 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:28:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:10,693 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-04 09:28:10,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:10,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:10,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:10,694 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:28:10,694 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:28:10,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:10,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:28:10,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-04 09:28:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:10,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:10,884 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:10,884 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:10,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:10,884 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:10,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:10,885 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:10,885 INFO L423 AbstractCegarLoop]: === Iteration 213 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:10,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:10,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1028053629, now seen corresponding path program 199 times [2018-10-04 09:28:10,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:10,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:10,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:10,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:10,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:10,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:10,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:10,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:10,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:11,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:11,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:11,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:11,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:11,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:11,013 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:11,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:11,448 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-04 09:28:11,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:11,449 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:11,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:11,449 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:28:11,449 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:28:11,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:28:11,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-04 09:28:11,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:28:11,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:28:11,641 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:28:11,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:11,642 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:28:11,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:11,642 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:28:11,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:11,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:11,642 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:11,642 INFO L423 AbstractCegarLoop]: === Iteration 214 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:11,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:11,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1029898749, now seen corresponding path program 200 times [2018-10-04 09:28:11,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:11,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:11,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:11,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:11,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:11,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:11,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:11,729 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:11,734 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:11,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:11,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:11,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:11,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:11,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:11,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:11,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:11,758 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:28:12,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:12,183 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:28:12,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:12,184 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:12,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:12,184 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:28:12,184 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:28:12,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:12,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:28:12,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-04 09:28:12,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:12,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:12,366 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:12,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:12,366 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:12,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:12,367 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:12,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:12,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:12,367 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:12,367 INFO L423 AbstractCegarLoop]: === Iteration 215 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:12,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:12,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1029900671, now seen corresponding path program 201 times [2018-10-04 09:28:12,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:12,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:12,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:12,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:12,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:12,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:12,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:12,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:12,448 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:28:12,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:12,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:12,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:12,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:12,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:12,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:12,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:12,472 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:12,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:12,874 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:28:12,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:12,875 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:12,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:12,875 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:28:12,875 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:28:12,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:12,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:28:13,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-10-04 09:28:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:28:13,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:28:13,030 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-04 09:28:13,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:13,030 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:28:13,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:13,031 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:28:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:13,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:13,031 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:13,031 INFO L423 AbstractCegarLoop]: === Iteration 216 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:13,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:13,031 INFO L82 PathProgramCache]: Analyzing trace with hash -66897285, now seen corresponding path program 202 times [2018-10-04 09:28:13,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:13,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:13,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:13,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:13,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:13,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:13,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:13,123 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:13,128 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:13,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:13,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:13,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:13,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:13,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:13,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:13,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:13,152 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-04 09:28:13,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:13,548 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:28:13,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:13,549 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:13,549 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:28:13,549 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:28:13,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:13,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:28:13,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-04 09:28:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:13,740 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:13,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:13,740 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:13,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:13,740 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:13,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:13,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:13,741 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:13,741 INFO L423 AbstractCegarLoop]: === Iteration 217 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:13,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:13,741 INFO L82 PathProgramCache]: Analyzing trace with hash -66895363, now seen corresponding path program 203 times [2018-10-04 09:28:13,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:13,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:13,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:13,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:13,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:13,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:13,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:13,835 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:13,847 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:28:13,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:13,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:13,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:13,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:13,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:13,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:13,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:13,872 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:14,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:14,245 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:28:14,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:14,245 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:14,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:14,246 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:28:14,246 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:28:14,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:14,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:28:14,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-04 09:28:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:28:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:28:14,439 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:28:14,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:14,439 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:28:14,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:14,439 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:28:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:14,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:14,439 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:14,440 INFO L423 AbstractCegarLoop]: === Iteration 218 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:14,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:14,440 INFO L82 PathProgramCache]: Analyzing trace with hash -65050243, now seen corresponding path program 204 times [2018-10-04 09:28:14,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:14,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:14,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:14,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:14,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:14,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:14,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:14,677 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:14,685 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:28:14,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:14,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:14,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:14,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:14,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:14,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:14,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:14,709 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:28:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:15,115 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:28:15,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:15,116 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:15,116 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:28:15,116 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:28:15,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:15,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:28:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-04 09:28:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:15,308 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:15,309 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:15,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:15,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:15,309 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:15,309 INFO L423 AbstractCegarLoop]: === Iteration 219 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:15,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:15,309 INFO L82 PathProgramCache]: Analyzing trace with hash -65048321, now seen corresponding path program 205 times [2018-10-04 09:28:15,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:15,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:15,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:15,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:15,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:15,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:15,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:15,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:15,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:15,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:15,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:15,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:15,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:15,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:15,409 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:15,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:15,799 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:28:15,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:15,800 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:15,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:15,800 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:28:15,800 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:28:15,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:15,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:28:15,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-10-04 09:28:15,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:28:15,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:28:15,982 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:28:15,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:15,983 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:28:15,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:28:15,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:15,983 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:15,983 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:15,983 INFO L423 AbstractCegarLoop]: === Iteration 220 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:15,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:15,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1708110077, now seen corresponding path program 206 times [2018-10-04 09:28:15,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:15,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:15,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:15,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:15,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:16,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:16,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:16,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:16,063 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:16,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:16,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:16,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:16,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:16,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:16,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:16,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:16,087 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:28:16,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:16,451 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:28:16,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:16,451 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:16,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:16,452 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:28:16,452 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:28:16,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:28:16,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-04 09:28:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:16,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:16,647 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:16,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:16,647 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:16,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:16,647 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:16,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:16,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:16,648 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:16,648 INFO L423 AbstractCegarLoop]: === Iteration 221 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:16,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:16,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1708111999, now seen corresponding path program 207 times [2018-10-04 09:28:16,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:16,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:16,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:16,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:16,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:16,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:16,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:16,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:16,723 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:28:16,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:16,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:16,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:16,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:16,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:16,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:16,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:16,747 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:17,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:17,123 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:28:17,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:17,124 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:17,124 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:28:17,124 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:28:17,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:17,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:28:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-04 09:28:17,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:28:17,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:28:17,304 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:28:17,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:17,304 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:28:17,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:17,304 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:28:17,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:17,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:17,304 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:17,304 INFO L423 AbstractCegarLoop]: === Iteration 222 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:17,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:17,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1709957119, now seen corresponding path program 208 times [2018-10-04 09:28:17,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:17,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:17,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:17,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:17,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:17,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:17,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:17,374 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:17,380 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:17,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:17,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:17,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:17,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:17,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:17,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:17,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:17,415 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:28:17,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:17,786 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:28:17,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:17,787 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:17,787 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:28:17,787 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:28:17,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:28:17,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-04 09:28:17,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:17,976 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:17,976 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:17,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:17,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:17,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:17,977 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-04 09:28:17,977 INFO L423 AbstractCegarLoop]: === Iteration 223 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:17,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:17,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1709959041, now seen corresponding path program 209 times [2018-10-04 09:28:17,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:17,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:17,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:17,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:17,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:18,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:18,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:18,063 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:18,071 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:28:18,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:18,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:18,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:18,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:18,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:18,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:18,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:18,095 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:18,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:18,441 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:28:18,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:18,442 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:18,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:18,442 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:28:18,442 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:28:18,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:18,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:28:18,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2018-10-04 09:28:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:28:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:28:18,561 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-10-04 09:28:18,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:18,562 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:28:18,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:28:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:18,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:18,562 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:18,562 INFO L423 AbstractCegarLoop]: === Iteration 224 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:18,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:18,562 INFO L82 PathProgramCache]: Analyzing trace with hash -2034826247, now seen corresponding path program 210 times [2018-10-04 09:28:18,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:18,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:18,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:18,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:18,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:18,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:18,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:18,660 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:18,669 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:28:18,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:18,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:18,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:18,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:18,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:18,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:18,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:18,694 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-10-04 09:28:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:19,089 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:28:19,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:19,090 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:19,090 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:28:19,090 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:28:19,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:19,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:28:19,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-04 09:28:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:19,291 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:19,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:19,291 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:19,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:19,292 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:19,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:19,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:19,292 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:19,292 INFO L423 AbstractCegarLoop]: === Iteration 225 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:19,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:19,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2034824325, now seen corresponding path program 211 times [2018-10-04 09:28:19,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:19,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:19,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:19,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:19,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:19,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:19,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:19,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:19,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:19,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:19,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:19,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:19,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:19,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:19,396 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:19,793 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:28:19,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:19,794 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:19,794 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:28:19,794 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:28:19,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:19,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:28:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-04 09:28:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:28:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:28:20,002 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:28:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:20,002 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:28:20,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:20,002 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:28:20,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:20,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:20,003 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:20,003 INFO L423 AbstractCegarLoop]: === Iteration 226 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:20,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:20,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2032979205, now seen corresponding path program 212 times [2018-10-04 09:28:20,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:20,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:20,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:20,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:20,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:20,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:20,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:20,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:20,082 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:20,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:20,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:20,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:20,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:20,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:20,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:20,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:20,118 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:28:21,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:21,180 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:28:21,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:21,181 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:21,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:21,181 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:28:21,181 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:28:21,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:21,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:28:21,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-04 09:28:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:21,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:21,481 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:21,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:21,481 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:21,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:21,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:21,481 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:21,481 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:21,481 INFO L423 AbstractCegarLoop]: === Iteration 227 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:21,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:21,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2032977283, now seen corresponding path program 213 times [2018-10-04 09:28:21,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:21,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:21,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:21,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:21,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:21,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:21,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:21,557 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:21,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:28:21,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:21,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:21,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:21,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:21,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:21,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:21,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:21,591 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:21,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:21,978 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:28:21,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:21,980 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:21,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:21,981 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:28:21,981 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:28:21,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:28:22,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-10-04 09:28:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:28:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:28:22,168 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:28:22,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:22,169 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:28:22,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:22,169 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:28:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:22,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:22,169 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:22,169 INFO L423 AbstractCegarLoop]: === Iteration 228 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:22,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:22,169 INFO L82 PathProgramCache]: Analyzing trace with hash -259818885, now seen corresponding path program 214 times [2018-10-04 09:28:22,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:22,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:22,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:22,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:22,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:22,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:22,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:22,243 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:22,248 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:22,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:22,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:22,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:22,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:22,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:22,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:22,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:22,283 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:28:22,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:22,733 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:28:22,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:22,733 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:22,734 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:28:22,734 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:28:22,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:28:22,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-04 09:28:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:22,938 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:22,938 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:22,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:22,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:22,938 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:22,938 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:22,938 INFO L423 AbstractCegarLoop]: === Iteration 229 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:22,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:22,938 INFO L82 PathProgramCache]: Analyzing trace with hash -259816963, now seen corresponding path program 215 times [2018-10-04 09:28:22,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:22,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:22,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:22,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:22,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:23,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:23,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:23,018 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:23,027 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:28:23,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:23,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:23,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:23,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:23,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:23,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:23,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:23,051 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:23,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:23,440 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:28:23,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:23,440 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:23,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:23,441 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:28:23,441 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:28:23,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:23,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:28:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-10-04 09:28:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:28:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:28:23,643 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:28:23,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:23,643 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:28:23,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:28:23,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:23,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:23,644 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:23,644 INFO L423 AbstractCegarLoop]: === Iteration 230 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:23,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:23,644 INFO L82 PathProgramCache]: Analyzing trace with hash -257971843, now seen corresponding path program 216 times [2018-10-04 09:28:23,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:23,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:23,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:23,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:23,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:23,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:23,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:23,714 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:23,723 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:28:23,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:23,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:23,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:23,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:23,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:23,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:23,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:23,748 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:28:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:24,108 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:28:24,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:24,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:24,109 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:28:24,109 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:28:24,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:28:24,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-04 09:28:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:24,328 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:24,328 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:24,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:24,328 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:24,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:24,329 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:24,329 INFO L423 AbstractCegarLoop]: === Iteration 231 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:24,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:24,329 INFO L82 PathProgramCache]: Analyzing trace with hash -257969921, now seen corresponding path program 217 times [2018-10-04 09:28:24,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:24,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:24,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:24,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:24,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:24,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:24,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:24,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:24,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:24,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:24,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:24,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:24,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:24,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:24,435 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:24,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:24,787 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:28:24,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:24,788 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:24,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:24,788 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:28:24,788 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:28:24,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:24,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:28:24,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-10-04 09:28:24,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:28:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:28:24,954 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-04 09:28:24,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:24,954 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:28:24,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:24,954 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:28:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:24,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:24,954 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:24,955 INFO L423 AbstractCegarLoop]: === Iteration 232 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:24,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:24,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1354767877, now seen corresponding path program 218 times [2018-10-04 09:28:24,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:24,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:24,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:24,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:24,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:25,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:25,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:25,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:25,027 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:25,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:25,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:25,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:25,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:25,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:25,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:25,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:25,049 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-04 09:28:25,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:25,523 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:28:25,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:25,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:25,524 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:28:25,524 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:28:25,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:25,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:28:25,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-04 09:28:25,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:25,772 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:25,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:25,772 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:25,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:25,772 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:25,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:25,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:25,772 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:25,773 INFO L423 AbstractCegarLoop]: === Iteration 233 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:25,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:25,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1354765955, now seen corresponding path program 219 times [2018-10-04 09:28:25,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:25,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:25,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:25,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:25,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:25,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:25,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:25,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:25,856 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:28:25,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:25,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:25,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:25,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:25,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:25,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:25,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:25,891 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:26,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:26,430 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:28:26,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:26,430 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:26,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:26,431 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:28:26,431 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:28:26,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:28:26,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-04 09:28:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:28:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:28:26,650 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:28:26,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:26,650 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:28:26,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:26,650 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:28:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:26,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:26,650 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:26,651 INFO L423 AbstractCegarLoop]: === Iteration 234 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:26,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:26,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1352920835, now seen corresponding path program 220 times [2018-10-04 09:28:26,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:26,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:26,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:26,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:26,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:26,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:26,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:26,722 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:26,727 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:26,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:26,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:26,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:26,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:26,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:26,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:26,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:26,750 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:28:27,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:27,182 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:28:27,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:27,183 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:27,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:27,183 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:28:27,183 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:28:27,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:27,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:28:27,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-04 09:28:27,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:27,410 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:27,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:27,410 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:27,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:27,411 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:27,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:27,411 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:27,411 INFO L423 AbstractCegarLoop]: === Iteration 235 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:27,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:27,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1352918913, now seen corresponding path program 221 times [2018-10-04 09:28:27,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:27,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:27,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:27,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:27,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:27,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:27,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:27,482 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:27,491 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:28:27,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:27,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:27,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:27,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:27,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:27,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:27,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:27,515 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:27,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:27,939 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:28:27,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:27,939 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:27,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:27,940 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:28:27,940 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:28:27,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:28:28,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-10-04 09:28:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:28:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:28:28,129 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:28:28,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:28,129 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:28:28,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:28,129 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:28:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:28,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:28,129 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:28,129 INFO L423 AbstractCegarLoop]: === Iteration 236 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:28,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash 420239485, now seen corresponding path program 222 times [2018-10-04 09:28:28,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:28,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:28,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:28,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:28,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:28,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:28,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:28,203 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:28,211 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:28:28,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:28,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:28,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:28,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:28,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:28,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:28,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:28,241 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:28:28,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:28,666 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:28:28,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:28,667 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:28,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:28,667 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:28:28,667 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:28:28,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:28:28,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-04 09:28:28,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:28,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:28,895 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:28,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:28,895 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:28,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:28,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:28,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:28,896 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:28,896 INFO L423 AbstractCegarLoop]: === Iteration 237 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:28,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:28,896 INFO L82 PathProgramCache]: Analyzing trace with hash 420241407, now seen corresponding path program 223 times [2018-10-04 09:28:28,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:28,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:28,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:28,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:28,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:29,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:29,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-04 09:28:29,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:29,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:29,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:29,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:29,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:29,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:29,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:29,964 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:30,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:30,447 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:28:30,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:30,448 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:30,448 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:28:30,448 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:28:30,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:30,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:28:30,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-10-04 09:28:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:28:30,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:28:30,648 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:28:30,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:30,648 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:28:30,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:30,649 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:28:30,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:30,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:30,649 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:30,649 INFO L423 AbstractCegarLoop]: === Iteration 238 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:30,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:30,649 INFO L82 PathProgramCache]: Analyzing trace with hash 422086527, now seen corresponding path program 224 times [2018-10-04 09:28:30,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:30,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:30,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:30,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:30,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:30,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:30,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:30,719 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:30,728 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:30,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:30,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:30,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:30,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:30,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:30,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:30,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:30,750 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:28:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:31,132 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:28:31,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:31,133 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:31,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:31,133 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:28:31,133 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:28:31,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:28:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-04 09:28:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:31,353 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:31,353 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:31,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:31,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:31,353 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-04 09:28:31,353 INFO L423 AbstractCegarLoop]: === Iteration 239 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:31,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:31,354 INFO L82 PathProgramCache]: Analyzing trace with hash 422088449, now seen corresponding path program 225 times [2018-10-04 09:28:31,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:31,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:31,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:31,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:31,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:31,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:31,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:31,420 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:31,430 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:28:31,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:31,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:31,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:31,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:31,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:31,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:31,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:31,454 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:31,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:31,828 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:28:31,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:31,829 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:31,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:31,829 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:28:31,829 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:28:31,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:31,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:28:31,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2018-10-04 09:28:31,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:28:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:28:31,981 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-04 09:28:31,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:31,982 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:28:31,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:31,982 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:28:31,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:31,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:31,982 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:31,982 INFO L423 AbstractCegarLoop]: === Iteration 240 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:31,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:31,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1333761669, now seen corresponding path program 226 times [2018-10-04 09:28:31,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:31,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:31,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:31,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:31,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:32,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:32,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:32,053 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:32,061 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:32,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:32,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:32,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:32,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:32,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:32,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:32,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:32,085 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-04 09:28:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:32,465 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:28:32,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:32,466 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:32,466 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:28:32,466 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:28:32,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:32,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:28:32,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-04 09:28:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:32,681 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:32,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:32,681 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:32,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:32,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:32,681 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:32,681 INFO L423 AbstractCegarLoop]: === Iteration 241 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:32,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:32,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1333759747, now seen corresponding path program 227 times [2018-10-04 09:28:32,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:32,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:32,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:32,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:32,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:32,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:32,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:32,751 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:32,760 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:28:32,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:32,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:32,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:32,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:32,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:32,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:32,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:32,784 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:33,168 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:28:33,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:33,169 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:33,169 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:28:33,169 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:28:33,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:28:33,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-04 09:28:33,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:28:33,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:28:33,381 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:28:33,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:33,381 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:28:33,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:33,381 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:28:33,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:33,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:33,381 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:33,382 INFO L423 AbstractCegarLoop]: === Iteration 242 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:33,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:33,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1331914627, now seen corresponding path program 228 times [2018-10-04 09:28:33,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:33,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:33,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:33,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:33,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:33,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:33,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:33,463 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:33,472 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:28:33,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:33,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:33,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:33,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:33,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:33,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:33,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:33,496 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:28:33,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:33,862 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:28:33,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:33,862 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:33,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:33,862 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:28:33,863 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:28:33,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:33,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:28:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-10-04 09:28:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:34,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:34,076 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:34,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:34,076 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:34,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:34,076 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:34,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:34,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:34,077 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:34,077 INFO L423 AbstractCegarLoop]: === Iteration 243 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:34,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:34,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1331912705, now seen corresponding path program 229 times [2018-10-04 09:28:34,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:34,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:34,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:34,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:34,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:34,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:34,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:34,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:34,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:34,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:34,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:34,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:34,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:34,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:34,232 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:34,612 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:28:34,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:34,613 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:34,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:34,613 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:28:34,613 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:28:34,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:28:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-04 09:28:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:28:34,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:28:34,812 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:28:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:34,812 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:28:34,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:28:34,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:34,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:34,812 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:34,812 INFO L423 AbstractCegarLoop]: === Iteration 244 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:34,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:34,812 INFO L82 PathProgramCache]: Analyzing trace with hash 441245693, now seen corresponding path program 230 times [2018-10-04 09:28:34,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:34,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:34,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:34,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:34,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:34,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:34,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:34,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:34,887 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:34,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:34,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:34,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:34,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:34,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:34,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:34,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:34,912 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:28:35,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:35,303 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:28:35,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:35,303 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:35,304 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:28:35,304 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:28:35,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:35,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:28:35,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-04 09:28:35,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:35,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:35,521 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:35,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:35,521 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:35,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:35,522 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:35,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:35,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:35,522 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:35,522 INFO L423 AbstractCegarLoop]: === Iteration 245 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:35,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:35,522 INFO L82 PathProgramCache]: Analyzing trace with hash 441247615, now seen corresponding path program 231 times [2018-10-04 09:28:35,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:35,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:35,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:35,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:35,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:35,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:35,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:35,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:35,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:28:35,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:35,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:35,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:35,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:35,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:35,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:35,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:35,643 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:36,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:36,034 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:28:36,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:36,035 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:36,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:36,035 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:28:36,035 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:28:36,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:36,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:28:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-04 09:28:36,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:28:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:28:36,248 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:28:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:36,248 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:28:36,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:36,248 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:28:36,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:36,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:36,248 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:36,249 INFO L423 AbstractCegarLoop]: === Iteration 246 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:36,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:36,249 INFO L82 PathProgramCache]: Analyzing trace with hash 443092735, now seen corresponding path program 232 times [2018-10-04 09:28:36,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:36,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:36,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:36,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:36,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:36,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:36,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:36,320 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:36,326 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:36,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:36,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:36,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:36,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:36,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:36,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:36,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:36,349 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:28:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:36,714 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:28:36,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:36,715 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:36,715 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:28:36,715 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:28:36,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:36,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:28:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-10-04 09:28:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:36,954 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:36,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:36,954 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:36,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:36,954 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:36,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:36,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:36,954 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-04 09:28:36,954 INFO L423 AbstractCegarLoop]: === Iteration 247 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:36,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:36,955 INFO L82 PathProgramCache]: Analyzing trace with hash 443094657, now seen corresponding path program 233 times [2018-10-04 09:28:36,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:36,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:36,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:36,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:36,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:37,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:37,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:37,023 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:37,032 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:28:37,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:37,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:37,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:37,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:37,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:37,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:37,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:37,056 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:37,417 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:28:37,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:37,418 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:37,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:37,418 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:28:37,418 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:28:37,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:37,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:28:37,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-10-04 09:28:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:28:37,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:28:37,597 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-04 09:28:37,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:37,597 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:28:37,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:28:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:37,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:37,597 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-04 09:28:37,597 INFO L423 AbstractCegarLoop]: === Iteration 248 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:37,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:37,598 INFO L82 PathProgramCache]: Analyzing trace with hash -653703299, now seen corresponding path program 234 times [2018-10-04 09:28:37,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:37,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:37,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:37,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:37,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:37,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:37,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:37,693 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:37,702 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:28:37,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:37,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:37,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:37,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:37,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:37,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:37,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:37,726 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-04 09:28:38,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:38,085 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:28:38,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:38,086 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:38,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:38,086 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:28:38,086 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:28:38,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:38,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:28:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-04 09:28:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:38,308 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:38,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:38,308 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:38,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:38,308 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:38,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:38,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:38,308 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:38,308 INFO L423 AbstractCegarLoop]: === Iteration 249 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:38,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:38,308 INFO L82 PathProgramCache]: Analyzing trace with hash -653701377, now seen corresponding path program 235 times [2018-10-04 09:28:38,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:38,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:38,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:38,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:38,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:38,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:38,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:38,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:38,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:38,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:38,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:38,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:38,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:38,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:38,409 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:38,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:38,746 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:28:38,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:38,747 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:38,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:38,747 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:28:38,747 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:28:38,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:38,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:28:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-04 09:28:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:28:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:28:38,971 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:28:38,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:38,972 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:28:38,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:28:38,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:38,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:38,972 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:38,972 INFO L423 AbstractCegarLoop]: === Iteration 250 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:38,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:38,972 INFO L82 PathProgramCache]: Analyzing trace with hash -651856257, now seen corresponding path program 236 times [2018-10-04 09:28:38,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:38,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:38,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:38,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:38,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:39,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:39,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:39,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:39,056 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:39,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:39,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:39,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:39,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:39,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:39,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:39,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:39,091 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:28:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:39,505 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:28:39,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:39,505 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:39,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:39,506 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:28:39,506 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:28:39,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:28:39,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-04 09:28:39,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:39,747 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:39,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:39,748 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:39,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:39,748 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:39,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:39,748 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-04 09:28:39,748 INFO L423 AbstractCegarLoop]: === Iteration 251 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:39,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:39,748 INFO L82 PathProgramCache]: Analyzing trace with hash -651854335, now seen corresponding path program 237 times [2018-10-04 09:28:39,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:39,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:39,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:39,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:39,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:39,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:39,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:39,826 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:39,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:28:39,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:39,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:39,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:39,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:39,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:39,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:39,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:39,859 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:40,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:40,201 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:28:40,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:40,202 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:40,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:40,202 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:28:40,202 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:28:40,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:40,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:28:40,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-04 09:28:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:28:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:28:40,419 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-04 09:28:40,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:40,419 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:28:40,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:40,419 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:28:40,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:40,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:40,419 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-04 09:28:40,419 INFO L423 AbstractCegarLoop]: === Iteration 252 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:40,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:40,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1121304063, now seen corresponding path program 238 times [2018-10-04 09:28:40,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:40,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:40,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:40,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:40,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:40,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:40,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:40,490 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:40,496 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:40,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:40,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:40,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:40,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:40,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:40,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:40,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:40,519 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-04 09:28:40,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:40,845 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:28:40,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:40,846 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:40,846 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:28:40,846 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:28:40,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:40,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:28:41,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2018-10-04 09:28:41,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:41,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:41,079 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:41,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:41,079 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:41,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:41,079 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:41,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:41,080 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-04 09:28:41,080 INFO L423 AbstractCegarLoop]: === Iteration 253 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:41,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:41,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1121305985, now seen corresponding path program 239 times [2018-10-04 09:28:41,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:41,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:41,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:41,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:41,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:41,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:41,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:41,156 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:41,166 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:28:41,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:41,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:41,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:41,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:41,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:41,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:41,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:41,191 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:41,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:41,553 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:28:41,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:41,554 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:41,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:41,554 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:28:41,554 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:28:41,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:41,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:28:41,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-10-04 09:28:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:28:41,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:28:41,793 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-04 09:28:41,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:41,793 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:28:41,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:28:41,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:41,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:41,793 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-04 09:28:41,794 INFO L423 AbstractCegarLoop]: === Iteration 254 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:41,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:41,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1123151105, now seen corresponding path program 240 times [2018-10-04 09:28:41,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:41,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:41,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:41,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:41,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:41,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:41,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:41,862 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:41,871 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:28:41,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:41,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:41,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:41,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:41,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:41,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:41,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:41,895 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-04 09:28:42,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:42,216 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-04 09:28:42,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:42,216 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:42,217 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:28:42,217 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:28:42,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:42,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:28:42,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2018-10-04 09:28:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:42,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:42,445 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-04 09:28:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:42,445 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:42,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:42,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:28:42,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:42,445 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-10-04 09:28:42,445 INFO L423 AbstractCegarLoop]: === Iteration 255 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:42,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:42,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1123153027, now seen corresponding path program 7 times [2018-10-04 09:28:42,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:42,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:42,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:42,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:42,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:43,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:43,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:43,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:43,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:43,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:43,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:28:43,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:28:43,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:28:43,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:43,519 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-04 09:28:43,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:43,901 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2018-10-04 09:28:43,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:28:43,901 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-04 09:28:43,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:43,902 INFO L225 Difference]: With dead ends: 36 [2018-10-04 09:28:43,902 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 09:28:43,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:28:43,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 09:28:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2018-10-04 09:28:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:28:44,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-04 09:28:44,044 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-10-04 09:28:44,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:44,044 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-04 09:28:44,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:28:44,044 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-04 09:28:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:44,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:44,044 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2018-10-04 09:28:44,044 INFO L423 AbstractCegarLoop]: === Iteration 256 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:44,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:44,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1610002744, now seen corresponding path program 8 times [2018-10-04 09:28:44,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:44,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:44,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:44,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:44,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:44,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:44,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:44,141 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:44,154 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:44,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:44,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:44,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:44,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:44,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:44,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:44,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:44,179 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 11 states. [2018-10-04 09:28:44,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:44,762 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-04 09:28:44,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:28:44,763 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:28:44,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:44,763 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:28:44,763 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:28:44,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:44,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:28:45,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-04 09:28:45,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:28:45,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:28:45,031 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:28:45,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:45,031 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:28:45,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:28:45,032 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:28:45,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:45,032 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:45,032 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-04 09:28:45,032 INFO L423 AbstractCegarLoop]: === Iteration 257 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:45,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:45,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004666, now seen corresponding path program 241 times [2018-10-04 09:28:45,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:45,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:45,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:45,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:45,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:45,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:45,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:45,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:45,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:45,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:45,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:45,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:45,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:45,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:45,281 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:28:45,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:45,883 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-04 09:28:45,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:28:45,884 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:28:45,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:45,884 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:28:45,884 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:28:45,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:28:46,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-04 09:28:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:46,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:46,152 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:28:46,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:46,152 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:46,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:28:46,153 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:46,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:46,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:46,153 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-04 09:28:46,153 INFO L423 AbstractCegarLoop]: === Iteration 258 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:46,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:46,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1611849786, now seen corresponding path program 242 times [2018-10-04 09:28:46,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:46,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:46,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:46,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:46,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:46,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:46,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:46,257 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:46,264 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:46,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:46,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:46,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:46,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:46,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:46,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:46,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:46,288 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:28:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:46,864 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-04 09:28:46,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:28:46,865 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:28:46,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:46,865 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:28:46,865 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:28:46,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:46,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:28:47,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-04 09:28:47,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:28:47,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:28:47,169 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:28:47,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:47,169 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:28:47,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:28:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:28:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:47,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:47,169 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:28:47,169 INFO L423 AbstractCegarLoop]: === Iteration 259 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:47,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:47,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1611851708, now seen corresponding path program 243 times [2018-10-04 09:28:47,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:47,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:47,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:47,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:47,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:47,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:47,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:47,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:47,255 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:28:47,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:47,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:47,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:47,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:47,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:47,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:47,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:47,280 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:28:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:47,838 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:28:47,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:28:47,838 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:28:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:47,839 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:28:47,839 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:28:47,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:47,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:28:48,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-04 09:28:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:28:48,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:28:48,094 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-04 09:28:48,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:48,094 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:28:48,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:28:48,094 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:28:48,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:48,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:48,094 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-04 09:28:48,095 INFO L423 AbstractCegarLoop]: === Iteration 260 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:48,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:48,095 INFO L82 PathProgramCache]: Analyzing trace with hash -909957190, now seen corresponding path program 244 times [2018-10-04 09:28:48,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:48,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:48,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:48,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:48,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:48,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:48,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:48,174 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:48,179 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:48,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:48,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:48,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:48,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:48,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:48,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:48,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:48,203 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-04 09:28:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:48,798 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-04 09:28:48,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:28:48,799 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:28:48,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:48,799 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:28:48,799 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:28:48,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:48,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:28:49,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-04 09:28:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:28:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:28:49,070 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:28:49,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:49,070 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:28:49,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:28:49,070 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:28:49,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:49,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:49,070 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:28:49,070 INFO L423 AbstractCegarLoop]: === Iteration 261 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:49,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:49,071 INFO L82 PathProgramCache]: Analyzing trace with hash -909955268, now seen corresponding path program 245 times [2018-10-04 09:28:49,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:49,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:49,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:49,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:49,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:49,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:49,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:49,174 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:49,183 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:28:49,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:49,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:49,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:49,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:49,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:49,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:49,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:49,206 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:28:49,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:49,808 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-04 09:28:49,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:28:49,808 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:28:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:49,809 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:28:49,809 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:28:49,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:28:50,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-04 09:28:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:50,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:50,103 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:28:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:50,104 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:50,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:28:50,104 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:50,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:50,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:50,104 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:28:50,104 INFO L423 AbstractCegarLoop]: === Iteration 262 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:50,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:50,104 INFO L82 PathProgramCache]: Analyzing trace with hash -908110148, now seen corresponding path program 246 times [2018-10-04 09:28:50,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:50,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:50,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:50,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:50,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:50,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:50,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:50,180 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:50,189 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:28:50,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:50,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:50,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:50,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:50,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:50,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:50,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:50,213 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:28:50,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:50,800 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-04 09:28:50,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:28:50,801 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:28:50,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:50,801 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:28:50,801 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:28:50,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:50,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:28:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-04 09:28:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:28:51,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:28:51,073 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:28:51,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:51,073 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:28:51,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:28:51,073 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:28:51,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:51,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:51,074 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:28:51,074 INFO L423 AbstractCegarLoop]: === Iteration 263 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:51,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:51,074 INFO L82 PathProgramCache]: Analyzing trace with hash -908108226, now seen corresponding path program 247 times [2018-10-04 09:28:51,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:51,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:51,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:51,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:51,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:51,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:51,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:51,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:51,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:51,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:51,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:51,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:51,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:51,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:51,184 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:28:51,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:51,732 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:28:51,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:28:51,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:28:51,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:51,733 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:28:51,733 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:28:51,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:28:51,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-04 09:28:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:28:51,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:28:51,969 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-04 09:28:51,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:51,969 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:28:51,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:28:51,969 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:28:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:51,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:51,969 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-04 09:28:51,970 INFO L423 AbstractCegarLoop]: === Iteration 264 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:51,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:51,970 INFO L82 PathProgramCache]: Analyzing trace with hash -2004906182, now seen corresponding path program 248 times [2018-10-04 09:28:51,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:51,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:51,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:51,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:51,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:52,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:52,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:52,046 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:52,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:52,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:52,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:52,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:52,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:52,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:52,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:52,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:52,075 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-04 09:28:52,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:52,639 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:28:52,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:28:52,639 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:28:52,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:52,640 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:28:52,640 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:28:52,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:52,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:28:52,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-04 09:28:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:28:52,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:28:52,923 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:28:52,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:52,924 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:28:52,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:28:52,924 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:28:52,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:52,924 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:52,924 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:28:52,924 INFO L423 AbstractCegarLoop]: === Iteration 265 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:52,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:52,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2004904260, now seen corresponding path program 249 times [2018-10-04 09:28:52,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:52,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:52,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:52,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:52,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:52,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:52,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:53,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:53,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:28:53,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:53,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:53,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:53,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:53,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:53,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:53,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:53,049 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:28:53,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:53,625 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:28:53,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:28:53,626 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:28:53,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:53,626 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:28:53,626 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:28:53,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:53,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:28:53,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-04 09:28:53,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:53,924 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:28:53,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:53,924 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:53,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:28:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:53,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:53,925 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:53,925 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:28:53,925 INFO L423 AbstractCegarLoop]: === Iteration 266 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:53,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:53,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2003059140, now seen corresponding path program 250 times [2018-10-04 09:28:53,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:53,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:53,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:53,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:53,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:53,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:53,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:54,002 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:54,009 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:54,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:54,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:54,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:54,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:54,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:54,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:54,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:54,032 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:28:54,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:54,594 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:28:54,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:28:54,594 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:28:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:54,595 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:28:54,595 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:28:54,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:54,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:28:54,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-04 09:28:54,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:28:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:28:54,898 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:28:54,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:54,898 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:28:54,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:28:54,899 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:28:54,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:54,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:54,899 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:28:54,899 INFO L423 AbstractCegarLoop]: === Iteration 267 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:54,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:54,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2003057218, now seen corresponding path program 251 times [2018-10-04 09:28:54,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:54,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:54,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:54,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:54,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:55,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:55,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:55,011 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:55,023 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:28:55,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:55,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:55,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:55,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:55,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:55,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:55,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:55,046 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:28:55,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:55,595 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:28:55,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:28:55,595 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:28:55,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:55,596 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:28:55,596 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:28:55,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:28:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-04 09:28:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:28:55,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:28:55,856 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-04 09:28:55,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:55,857 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:28:55,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:28:55,857 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:28:55,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:55,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:55,857 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:28:55,857 INFO L423 AbstractCegarLoop]: === Iteration 268 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:55,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:55,857 INFO L82 PathProgramCache]: Analyzing trace with hash -229898820, now seen corresponding path program 252 times [2018-10-04 09:28:55,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:55,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:55,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:55,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:55,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:55,934 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:55,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:55,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:55,942 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:55,951 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:28:55,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:55,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:55,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:55,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:55,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:55,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:55,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:55,977 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-04 09:28:56,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:56,491 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:28:56,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:28:56,492 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:28:56,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:56,492 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:28:56,492 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:28:56,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:56,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:28:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-04 09:28:56,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:28:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:28:56,767 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:28:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:56,767 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:28:56,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:28:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:28:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:56,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:56,768 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:28:56,768 INFO L423 AbstractCegarLoop]: === Iteration 269 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:56,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:56,768 INFO L82 PathProgramCache]: Analyzing trace with hash -229896898, now seen corresponding path program 253 times [2018-10-04 09:28:56,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:56,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:56,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:56,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:56,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:56,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:56,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:56,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:56,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:56,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:56,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:56,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:56,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:56,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:56,893 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:28:57,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:57,407 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:28:57,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:28:57,408 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:28:57,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:57,408 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:28:57,408 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:28:57,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:57,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:28:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-04 09:28:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:28:57,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:28:57,684 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:28:57,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:57,684 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:28:57,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:28:57,684 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:28:57,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:57,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:57,684 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:28:57,685 INFO L423 AbstractCegarLoop]: === Iteration 270 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:57,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:57,685 INFO L82 PathProgramCache]: Analyzing trace with hash -228051778, now seen corresponding path program 254 times [2018-10-04 09:28:57,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:57,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:57,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:57,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:57,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:57,756 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:57,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:57,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:57,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:57,772 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:57,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:57,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:57,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:57,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:57,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:57,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:57,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:57,798 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:28:58,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:58,309 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:28:58,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:28:58,310 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:28:58,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:58,310 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:28:58,310 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:28:58,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:58,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:28:58,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-04 09:28:58,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:28:58,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:28:58,589 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:28:58,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:58,589 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:28:58,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:28:58,589 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:28:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:58,589 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:58,589 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:28:58,589 INFO L423 AbstractCegarLoop]: === Iteration 271 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:58,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:58,590 INFO L82 PathProgramCache]: Analyzing trace with hash -228049856, now seen corresponding path program 255 times [2018-10-04 09:28:58,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:58,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:58,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:58,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:58,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:58,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:58,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:58,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:58,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:28:58,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:58,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:58,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:58,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:58,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:58,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:58,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:58,702 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:28:59,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:59,187 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:28:59,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:28:59,188 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:28:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:59,188 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:28:59,188 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:28:59,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:59,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:28:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-04 09:28:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:28:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:28:59,473 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-04 09:28:59,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:59,473 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:28:59,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:28:59,473 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:28:59,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:28:59,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:59,473 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-04 09:28:59,474 INFO L423 AbstractCegarLoop]: === Iteration 272 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:59,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:59,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1983899974, now seen corresponding path program 256 times [2018-10-04 09:28:59,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:59,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:59,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:59,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:59,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:59,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:59,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:59,572 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:59,578 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:59,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:59,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:59,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:59,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:28:59,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:28:59,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:28:59,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:28:59,602 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-04 09:29:00,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:00,233 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-04 09:29:00,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:00,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:00,234 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:29:00,234 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:29:00,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:00,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:29:00,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-04 09:29:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:00,522 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:00,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:00,523 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:00,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:00,523 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:00,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:00,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:00,523 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:29:00,523 INFO L423 AbstractCegarLoop]: === Iteration 273 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:00,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:00,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1983898052, now seen corresponding path program 257 times [2018-10-04 09:29:00,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:00,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:00,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:00,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:00,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:00,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:00,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:00,597 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:29:00,609 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:29:00,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:00,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:00,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:00,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:00,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:00,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:00,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:00,633 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:01,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:01,264 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-04 09:29:01,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:01,265 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:01,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:01,265 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:29:01,265 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:29:01,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:01,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:29:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-04 09:29:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:29:01,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:29:01,549 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:29:01,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:01,550 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:29:01,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:01,550 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:29:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:01,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:01,550 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:29:01,550 INFO L423 AbstractCegarLoop]: === Iteration 274 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:01,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:01,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1982052932, now seen corresponding path program 258 times [2018-10-04 09:29:01,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:01,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:01,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:01,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:01,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:01,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:01,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:01,641 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:29:01,650 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:29:01,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:01,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:01,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:01,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:01,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:01,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:01,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:01,674 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:29:02,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:02,305 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-04 09:29:02,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:02,305 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:02,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:02,306 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:29:02,306 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:29:02,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:02,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:29:02,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-04 09:29:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:02,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:02,592 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:02,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:02,592 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:02,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:02,592 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:02,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:02,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:02,592 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:02,592 INFO L423 AbstractCegarLoop]: === Iteration 275 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:02,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:02,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1982051010, now seen corresponding path program 259 times [2018-10-04 09:29:02,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:02,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:02,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:02,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:02,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:02,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:02,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:02,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:02,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:02,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:02,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:02,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:02,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:02,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:02,701 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:03,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:03,291 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:29:03,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:03,292 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:03,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:03,292 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:29:03,292 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:29:03,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:03,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:29:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-04 09:29:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:29:03,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:29:03,556 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-04 09:29:03,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:03,556 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:29:03,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:03,556 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:29:03,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:03,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:03,556 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:29:03,556 INFO L423 AbstractCegarLoop]: === Iteration 276 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:03,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:03,557 INFO L82 PathProgramCache]: Analyzing trace with hash -208892612, now seen corresponding path program 260 times [2018-10-04 09:29:03,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:03,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:03,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:03,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:03,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:03,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:03,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:03,633 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:29:03,638 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:29:03,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:03,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:03,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:03,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:03,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:03,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:03,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:03,662 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-04 09:29:04,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:04,306 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-04 09:29:04,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:04,307 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:04,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:04,307 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:29:04,307 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:29:04,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:04,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:29:04,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-04 09:29:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:04,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:04,609 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:04,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:04,609 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:04,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:04,609 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:04,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:04,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:04,609 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:04,609 INFO L423 AbstractCegarLoop]: === Iteration 277 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:04,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:04,610 INFO L82 PathProgramCache]: Analyzing trace with hash -208890690, now seen corresponding path program 261 times [2018-10-04 09:29:04,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:04,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:04,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:04,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:04,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:04,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:04,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:04,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:29:04,713 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:29:04,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:04,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:04,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:04,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:04,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:04,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:04,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:04,736 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:05,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:05,365 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-04 09:29:05,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:05,366 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:05,366 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:29:05,366 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:29:05,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:05,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:29:05,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-04 09:29:05,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:29:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:29:05,682 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:29:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:05,683 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:29:05,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:05,683 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:29:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:05,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:05,683 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:05,683 INFO L423 AbstractCegarLoop]: === Iteration 278 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:05,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:05,683 INFO L82 PathProgramCache]: Analyzing trace with hash -207045570, now seen corresponding path program 262 times [2018-10-04 09:29:05,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:05,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:05,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:05,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:05,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:05,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:05,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:05,760 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:29:05,766 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:29:05,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:05,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:05,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:05,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:05,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:05,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:05,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:05,789 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:29:06,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:06,409 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-04 09:29:06,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:06,410 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:06,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:06,410 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:29:06,410 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:29:06,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:29:06,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-04 09:29:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:06,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:06,729 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:06,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:06,729 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:06,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:06,729 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:06,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:06,730 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:29:06,730 INFO L423 AbstractCegarLoop]: === Iteration 279 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:06,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:06,730 INFO L82 PathProgramCache]: Analyzing trace with hash -207043648, now seen corresponding path program 263 times [2018-10-04 09:29:06,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:06,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:06,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:06,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:06,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:06,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:06,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:06,811 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:29:06,821 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:29:06,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:06,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:06,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:06,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:06,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:06,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:06,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:06,845 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:07,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:07,425 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:29:07,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:07,426 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:07,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:07,426 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:29:07,426 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:29:07,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:07,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:29:07,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-04 09:29:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:29:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:29:07,667 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-04 09:29:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:07,667 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:29:07,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:29:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:07,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:07,667 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:29:07,668 INFO L423 AbstractCegarLoop]: === Iteration 280 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:07,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:07,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1303841604, now seen corresponding path program 264 times [2018-10-04 09:29:07,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:07,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:07,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:07,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:07,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:07,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:07,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:07,741 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:29:07,751 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:29:07,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:07,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:07,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:07,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:07,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:07,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:07,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:07,775 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-04 09:29:08,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:08,368 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:29:08,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:08,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:08,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:08,369 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:29:08,369 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:29:08,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:08,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:29:08,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-04 09:29:08,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:08,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:08,678 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:08,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:08,678 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:08,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:08,678 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:08,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:08,678 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:08,679 INFO L423 AbstractCegarLoop]: === Iteration 281 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:08,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:08,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1303839682, now seen corresponding path program 265 times [2018-10-04 09:29:08,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:08,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:08,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:08,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:08,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:08,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:08,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:08,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:08,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:09,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:09,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:09,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:09,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:09,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:09,019 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:09,574 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:29:09,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:09,574 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:09,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:09,575 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:29:09,575 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:29:09,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:09,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:29:09,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-04 09:29:09,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:29:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:29:09,866 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:29:09,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:09,866 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:29:09,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:09,867 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:29:09,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:09,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:09,867 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:09,867 INFO L423 AbstractCegarLoop]: === Iteration 282 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:09,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:09,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1301994562, now seen corresponding path program 266 times [2018-10-04 09:29:09,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:09,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:09,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:09,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:09,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:09,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:09,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:09,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:29:09,993 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:29:09,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:09,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:10,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:10,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:10,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:10,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:10,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:10,016 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:29:10,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:10,617 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:29:10,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:10,617 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:10,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:10,618 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:29:10,618 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:29:10,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:10,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:29:10,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-04 09:29:10,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:10,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:10,939 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:10,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:10,939 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:10,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:10,939 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:10,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:10,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:10,939 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:29:10,940 INFO L423 AbstractCegarLoop]: === Iteration 283 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:10,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:10,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1301992640, now seen corresponding path program 267 times [2018-10-04 09:29:10,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:10,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:10,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:10,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:10,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:11,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:11,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:11,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:29:11,070 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:29:11,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:11,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:11,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:11,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:11,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:11,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:11,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:11,104 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:11,678 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:29:11,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:11,678 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:11,679 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:29:11,679 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:29:11,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:11,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:29:11,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-04 09:29:11,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:29:11,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:29:11,960 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-04 09:29:11,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:11,960 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:29:11,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:11,960 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:29:11,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:11,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:11,960 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:11,960 INFO L423 AbstractCegarLoop]: === Iteration 284 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:11,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:11,961 INFO L82 PathProgramCache]: Analyzing trace with hash 471165758, now seen corresponding path program 268 times [2018-10-04 09:29:11,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:11,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:11,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:11,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:11,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:12,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:12,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:12,035 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:29:12,041 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:29:12,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:12,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:12,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:12,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:12,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:12,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:12,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:12,064 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-04 09:29:12,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:12,606 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:29:12,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:12,607 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:12,607 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:29:12,607 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:29:12,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:12,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:29:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-04 09:29:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:12,937 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:12,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:12,937 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:12,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:12,937 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:12,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:12,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:12,938 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:29:12,938 INFO L423 AbstractCegarLoop]: === Iteration 285 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:12,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:12,938 INFO L82 PathProgramCache]: Analyzing trace with hash 471167680, now seen corresponding path program 269 times [2018-10-04 09:29:12,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:12,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:12,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:12,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:12,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:13,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:13,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:13,015 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:29:13,027 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:29:13,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:13,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:13,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:13,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:13,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:13,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:13,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:13,051 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:13,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:13,605 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:29:13,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:13,605 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:13,606 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:29:13,606 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:29:13,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:13,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:29:13,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-04 09:29:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:29:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:29:13,898 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:29:13,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:13,899 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:29:13,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:13,899 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:29:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:13,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:13,899 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:29:13,899 INFO L423 AbstractCegarLoop]: === Iteration 286 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:13,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:13,899 INFO L82 PathProgramCache]: Analyzing trace with hash 473012800, now seen corresponding path program 270 times [2018-10-04 09:29:13,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:13,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:13,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:13,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:13,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:13,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:13,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:13,975 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:29:13,985 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:29:13,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:13,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:14,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:14,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:14,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:14,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:14,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:14,009 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:29:14,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:14,532 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:29:14,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:14,532 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:14,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:14,533 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:29:14,533 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:29:14,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:14,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:29:14,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-04 09:29:14,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:14,834 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:14,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:14,835 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:14,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:14,835 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:14,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:14,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:14,835 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:14,835 INFO L423 AbstractCegarLoop]: === Iteration 287 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:14,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:14,835 INFO L82 PathProgramCache]: Analyzing trace with hash 473014722, now seen corresponding path program 271 times [2018-10-04 09:29:14,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:14,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:14,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:14,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:14,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:14,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:14,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:14,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:14,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:14,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:14,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:14,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:14,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:14,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:14,939 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:15,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:15,418 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:29:15,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:15,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:15,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:15,419 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:29:15,419 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:29:15,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:15,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:29:15,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-10-04 09:29:15,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:29:15,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:29:15,628 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-10-04 09:29:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:15,628 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:29:15,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:15,628 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:29:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:15,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:15,628 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-04 09:29:15,628 INFO L423 AbstractCegarLoop]: === Iteration 288 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:15,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:15,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1023196730, now seen corresponding path program 272 times [2018-10-04 09:29:15,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:15,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:15,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:15,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:15,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:15,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:15,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:15,705 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:29:15,712 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:29:15,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:15,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:15,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:15,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:15,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:15,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:15,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:15,736 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-10-04 09:29:16,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:16,335 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:29:16,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:16,335 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:16,336 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:29:16,336 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:29:16,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:16,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:29:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-04 09:29:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:16,680 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:16,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:16,680 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:16,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:16,681 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:16,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:16,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:16,681 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:29:16,681 INFO L423 AbstractCegarLoop]: === Iteration 289 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:16,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:16,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1023198652, now seen corresponding path program 273 times [2018-10-04 09:29:16,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:16,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:16,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:16,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:16,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:16,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:16,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:16,764 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:29:16,773 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:29:16,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:16,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:16,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:16,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:16,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:16,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:16,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:16,797 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:17,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:17,379 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:29:17,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:17,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:17,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:17,380 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:29:17,380 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:29:17,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:17,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:29:17,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-04 09:29:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:29:17,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:29:17,695 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:29:17,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:17,695 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:29:17,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:29:17,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:17,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:17,696 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:29:17,696 INFO L423 AbstractCegarLoop]: === Iteration 290 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:17,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:17,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1025043772, now seen corresponding path program 274 times [2018-10-04 09:29:17,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:17,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:17,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:17,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:17,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:17,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:17,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:17,773 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:29:17,779 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:29:17,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:17,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:17,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:17,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:17,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:17,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:17,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:17,812 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:29:18,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:18,507 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:29:18,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:18,507 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:18,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:18,508 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:29:18,508 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:29:18,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:18,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:29:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-04 09:29:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:18,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:18,817 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:18,817 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:18,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:18,818 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:18,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:18,818 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:18,818 INFO L423 AbstractCegarLoop]: === Iteration 291 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:18,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:18,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1025045694, now seen corresponding path program 275 times [2018-10-04 09:29:18,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:18,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:18,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:18,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:18,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:18,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:18,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:18,902 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:29:18,912 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:29:18,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:18,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:18,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:18,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:18,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:18,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:18,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:18,936 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:19,506 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:29:19,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:19,506 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:19,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:19,507 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:29:19,507 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:29:19,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:29:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-04 09:29:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:29:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:29:19,803 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-04 09:29:19,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:19,803 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:29:19,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:19,803 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:29:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:19,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:19,803 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:29:19,804 INFO L423 AbstractCegarLoop]: === Iteration 292 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:19,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:19,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1496763204, now seen corresponding path program 276 times [2018-10-04 09:29:19,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:19,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:19,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:19,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:19,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:19,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:19,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:19,879 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:29:19,890 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:29:19,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:19,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:19,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:19,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:19,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:19,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:19,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:19,913 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-04 09:29:20,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:20,463 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:29:20,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:20,464 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:20,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:20,464 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:29:20,464 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:29:20,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:20,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:29:20,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-04 09:29:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:20,781 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:20,781 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:20,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:20,781 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:20,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:20,781 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:20,782 INFO L423 AbstractCegarLoop]: === Iteration 293 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:20,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:20,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1496761282, now seen corresponding path program 277 times [2018-10-04 09:29:20,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:20,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:20,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:20,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:20,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:20,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:20,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:20,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:20,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:20,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:20,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:20,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:20,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:20,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:20,906 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:21,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:21,458 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:29:21,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:21,458 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:21,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:21,459 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:29:21,459 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:29:21,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:21,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:29:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-04 09:29:21,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:29:21,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:29:21,829 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:29:21,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:21,829 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:29:21,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:21,829 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:29:21,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:21,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:21,830 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:21,830 INFO L423 AbstractCegarLoop]: === Iteration 294 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:21,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:21,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1494916162, now seen corresponding path program 278 times [2018-10-04 09:29:21,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:21,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:21,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:21,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:21,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:21,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:21,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:21,907 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:29:21,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:29:21,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:21,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:21,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:21,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:21,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:21,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:21,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:21,936 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:29:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:22,470 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:29:22,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:22,471 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:22,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:22,471 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:29:22,471 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:29:22,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:22,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:29:22,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-04 09:29:22,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:22,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:22,818 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:22,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:22,818 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:22,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:22,818 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:22,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:22,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:22,818 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:29:22,819 INFO L423 AbstractCegarLoop]: === Iteration 295 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:22,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:22,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1494914240, now seen corresponding path program 279 times [2018-10-04 09:29:22,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:22,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:22,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:22,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:22,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:22,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:22,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:22,897 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:29:22,908 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:29:22,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:22,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:22,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:22,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:22,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:22,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:22,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:22,932 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:23,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:23,447 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:29:23,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:23,447 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:23,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:23,448 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:29:23,448 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:29:23,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:23,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:29:23,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-04 09:29:23,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:29:23,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:29:23,717 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-04 09:29:23,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:23,718 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:29:23,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:23,718 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:29:23,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:23,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:23,718 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:29:23,718 INFO L423 AbstractCegarLoop]: === Iteration 296 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:23,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:23,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1703255100, now seen corresponding path program 280 times [2018-10-04 09:29:23,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:23,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:23,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:23,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:23,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:23,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:23,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:23,795 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:29:23,801 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:29:23,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:23,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:23,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:23,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:23,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:23,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:23,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:23,825 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-04 09:29:24,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:24,436 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:29:24,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:24,437 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:24,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:24,437 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:29:24,437 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:29:24,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:24,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:29:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-04 09:29:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:24,789 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:24,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:24,789 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:24,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:24,789 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:24,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:24,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:24,789 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:24,789 INFO L423 AbstractCegarLoop]: === Iteration 297 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:24,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:24,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1703257022, now seen corresponding path program 281 times [2018-10-04 09:29:24,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:24,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:24,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:24,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:24,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:24,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:24,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:24,870 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:29:24,880 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:29:24,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:24,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:24,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:24,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:24,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:24,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:24,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:24,904 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:25,486 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:29:25,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:25,487 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:25,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:25,487 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:29:25,487 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:29:25,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:29:25,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-04 09:29:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:29:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:29:25,797 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:29:25,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:25,798 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:29:25,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:25,798 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:29:25,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:25,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:25,798 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:25,798 INFO L423 AbstractCegarLoop]: === Iteration 298 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:25,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:25,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1705102142, now seen corresponding path program 282 times [2018-10-04 09:29:25,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:25,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:25,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:25,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:25,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:25,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:25,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:25,876 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:29:25,886 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:29:25,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:25,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:25,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:25,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:25,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:25,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:25,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:25,921 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:29:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:27,043 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:29:27,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:27,043 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:27,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:27,044 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:29:27,044 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:29:27,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:27,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:29:27,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-04 09:29:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:27,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:27,368 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:27,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:27,368 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:27,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:27,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:27,368 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:27,368 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:29:27,368 INFO L423 AbstractCegarLoop]: === Iteration 299 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:27,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:27,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1705104064, now seen corresponding path program 283 times [2018-10-04 09:29:27,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:27,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:27,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:27,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:27,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:27,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:27,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:27,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:27,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:27,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:27,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:27,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:27,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:27,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:27,474 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:28,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:28,070 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:29:28,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:28,071 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:28,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:28,071 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:29:28,071 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:29:28,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:28,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:29:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-04 09:29:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:29:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:29:28,445 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-04 09:29:28,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:28,445 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:29:28,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:28,445 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:29:28,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:28,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:28,445 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:28,445 INFO L423 AbstractCegarLoop]: === Iteration 300 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:28,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:28,446 INFO L82 PathProgramCache]: Analyzing trace with hash -816704834, now seen corresponding path program 284 times [2018-10-04 09:29:28,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:28,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:28,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:28,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:28,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:28,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:28,520 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:28,529 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:29:28,536 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:29:28,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:28,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:28,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:28,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:28,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:28,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:28,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:28,559 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-04 09:29:29,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:29,109 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:29:29,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:29,110 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:29,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:29,110 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:29:29,110 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:29:29,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:29,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:29:29,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-04 09:29:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:29,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:29,447 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:29,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:29,447 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:29,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:29,447 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:29,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:29,448 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:29:29,448 INFO L423 AbstractCegarLoop]: === Iteration 301 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:29,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:29,448 INFO L82 PathProgramCache]: Analyzing trace with hash -816702912, now seen corresponding path program 285 times [2018-10-04 09:29:29,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:29,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:29,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:29,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:29,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:29,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:29,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:29,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:29:29,531 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:29:29,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:29,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:29,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:29,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:29,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:29,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:29,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:29,555 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:30,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:30,131 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:29:30,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:30,131 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:30,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:30,132 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:29:30,132 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:29:30,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:30,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:29:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-04 09:29:30,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:29:30,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:29:30,449 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:29:30,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:30,449 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:29:30,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:30,450 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:29:30,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:30,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:30,450 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:29:30,450 INFO L423 AbstractCegarLoop]: === Iteration 302 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:30,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:30,450 INFO L82 PathProgramCache]: Analyzing trace with hash -814857792, now seen corresponding path program 286 times [2018-10-04 09:29:30,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:30,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:30,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:30,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:30,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:30,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:30,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:30,591 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:29:30,597 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:29:30,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:30,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:30,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:30,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:30,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:30,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:30,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:30,620 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:29:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:31,148 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:29:31,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:31,149 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:31,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:31,149 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:29:31,149 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:29:31,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:31,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:29:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-04 09:29:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:31,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:31,476 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:31,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:31,477 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:31,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:31,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:31,477 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:31,477 INFO L423 AbstractCegarLoop]: === Iteration 303 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:31,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash -814855870, now seen corresponding path program 287 times [2018-10-04 09:29:31,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:31,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:31,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:31,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:31,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:31,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:31,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:31,578 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:29:31,588 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:29:31,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:31,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:31,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:31,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:31,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:31,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:31,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:31,612 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:32,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:32,164 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:29:32,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:32,165 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:32,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:32,165 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:29:32,165 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:29:32,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:29:32,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-04 09:29:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:29:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:29:32,406 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-04 09:29:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:32,406 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:29:32,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:32,407 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:29:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:32,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:32,407 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:29:32,407 INFO L423 AbstractCegarLoop]: === Iteration 304 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:32,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:32,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1724261308, now seen corresponding path program 288 times [2018-10-04 09:29:32,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:32,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:32,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:32,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:32,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:32,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:32,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:32,484 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:29:32,494 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:29:32,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:32,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:32,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:32,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:32,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:32,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:32,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:32,518 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-04 09:29:33,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:33,075 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:29:33,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:33,076 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:33,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:33,076 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:29:33,076 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:29:33,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:33,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:29:33,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-04 09:29:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:33,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:33,406 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:33,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:33,406 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:33,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:33,406 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:33,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:33,406 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:33,406 INFO L423 AbstractCegarLoop]: === Iteration 305 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:33,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:33,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1724263230, now seen corresponding path program 289 times [2018-10-04 09:29:33,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:33,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:33,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:33,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:33,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:33,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:33,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:33,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:33,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:33,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:33,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:33,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:33,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:33,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:33,513 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:34,047 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:29:34,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:34,049 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:34,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:34,049 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:29:34,049 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:29:34,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:34,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:29:34,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-04 09:29:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:29:34,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:29:34,366 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:29:34,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:34,366 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:29:34,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:34,367 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:29:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:34,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:34,367 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:34,367 INFO L423 AbstractCegarLoop]: === Iteration 306 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:34,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:34,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1726108350, now seen corresponding path program 290 times [2018-10-04 09:29:34,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:34,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:34,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:34,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:34,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:34,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:34,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:34,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:29:34,455 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:29:34,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:34,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:34,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:34,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:34,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:34,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:34,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:34,479 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:29:34,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:34,992 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:29:34,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:34,993 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:34,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:34,993 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:29:34,993 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:29:34,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:29:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-04 09:29:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:35,348 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:35,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:35,348 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:35,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:35,349 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:35,349 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:29:35,349 INFO L423 AbstractCegarLoop]: === Iteration 307 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:35,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:35,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1726110272, now seen corresponding path program 291 times [2018-10-04 09:29:35,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:35,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:35,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:35,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:35,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:35,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:35,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:35,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:29:35,439 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:29:35,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:35,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:35,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:35,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:35,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:35,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:35,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:35,462 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:35,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:35,955 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:29:35,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:35,955 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:35,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:35,955 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:29:35,956 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:29:35,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:35,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:29:36,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-04 09:29:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:29:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:29:36,286 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-04 09:29:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:36,286 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:29:36,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:36,286 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:29:36,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:36,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:36,286 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:36,287 INFO L423 AbstractCegarLoop]: === Iteration 308 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:36,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:36,287 INFO L82 PathProgramCache]: Analyzing trace with hash -795698626, now seen corresponding path program 292 times [2018-10-04 09:29:36,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:36,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:36,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:36,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:36,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:36,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:36,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:36,400 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:29:36,405 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:29:36,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:36,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:36,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:36,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:36,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:36,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:36,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:36,439 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-04 09:29:36,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:36,986 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:29:36,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:36,986 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:36,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:36,987 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:29:36,987 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:29:36,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:36,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:29:37,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-04 09:29:37,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:37,341 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:37,342 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:37,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:37,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:37,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:37,342 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:29:37,342 INFO L423 AbstractCegarLoop]: === Iteration 309 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:37,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:37,342 INFO L82 PathProgramCache]: Analyzing trace with hash -795696704, now seen corresponding path program 293 times [2018-10-04 09:29:37,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:37,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:37,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:37,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:37,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:37,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:37,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:37,444 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:29:37,455 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:29:37,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:37,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:37,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:37,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:37,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:37,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:37,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:37,479 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:38,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:38,032 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:29:38,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:38,032 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:38,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:38,033 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:29:38,033 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:29:38,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:38,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:29:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-04 09:29:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:29:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:29:38,377 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:29:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:38,377 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:29:38,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:29:38,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:38,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:38,377 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:29:38,377 INFO L423 AbstractCegarLoop]: === Iteration 310 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:38,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:38,377 INFO L82 PathProgramCache]: Analyzing trace with hash -793851584, now seen corresponding path program 294 times [2018-10-04 09:29:38,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:38,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:38,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:38,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:38,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:38,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:38,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:38,455 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:29:38,469 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:29:38,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:38,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:38,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:38,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:38,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:38,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:38,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:38,493 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:29:39,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:39,022 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:29:39,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:39,023 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:39,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:39,023 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:29:39,023 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:29:39,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:39,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:29:39,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-04 09:29:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:39,353 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:39,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:39,353 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:39,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:39,353 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:39,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:39,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:39,353 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:39,353 INFO L423 AbstractCegarLoop]: === Iteration 311 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:39,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:39,354 INFO L82 PathProgramCache]: Analyzing trace with hash -793849662, now seen corresponding path program 295 times [2018-10-04 09:29:39,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:39,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:39,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:39,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:39,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:39,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:39,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:39,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:39,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:39,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:39,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:39,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:39,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:39,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:39,654 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:40,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:40,147 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:29:40,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:40,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:40,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:40,148 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:29:40,148 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:29:40,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:40,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:29:40,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-04 09:29:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:29:40,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:29:40,425 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-04 09:29:40,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:40,425 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:29:40,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:29:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:40,425 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:40,425 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:40,425 INFO L423 AbstractCegarLoop]: === Iteration 312 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:40,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:40,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1890647618, now seen corresponding path program 296 times [2018-10-04 09:29:40,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:40,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:40,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:40,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:40,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:40,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:40,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:40,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:29:40,507 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:29:40,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:40,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:40,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:40,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:40,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:40,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:40,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:40,532 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-04 09:29:40,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:40,995 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:29:40,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:40,996 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:40,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:40,996 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:29:40,996 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:29:40,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:29:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-04 09:29:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:41,362 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:41,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:41,362 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:41,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:41,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:41,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:41,362 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:29:41,362 INFO L423 AbstractCegarLoop]: === Iteration 313 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:41,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:41,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1890645696, now seen corresponding path program 297 times [2018-10-04 09:29:41,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:41,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:41,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:41,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:41,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:41,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:41,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:41,540 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:29:41,550 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:29:41,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:41,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:41,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:41,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:41,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:41,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:41,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:41,574 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:42,057 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:29:42,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:42,058 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:42,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:42,058 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:29:42,058 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:29:42,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:42,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:29:42,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-04 09:29:42,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:29:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:29:42,381 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:29:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:42,381 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:29:42,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:29:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:42,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:42,381 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:29:42,382 INFO L423 AbstractCegarLoop]: === Iteration 314 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:42,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:42,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1888800576, now seen corresponding path program 298 times [2018-10-04 09:29:42,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:42,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:42,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:42,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:42,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:42,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:42,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:42,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:29:42,466 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:29:42,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:42,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:42,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:42,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:42,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:42,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:42,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:42,500 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:29:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:43,043 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:29:43,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:43,044 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:43,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:43,044 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:29:43,044 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:29:43,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:29:43,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-04 09:29:43,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:43,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:43,377 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:43,378 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:43,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:43,378 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:43,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:43,378 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:43,378 INFO L423 AbstractCegarLoop]: === Iteration 315 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:43,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:43,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1888798654, now seen corresponding path program 299 times [2018-10-04 09:29:43,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:43,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:43,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:43,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:43,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:43,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:43,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:43,453 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:29:43,462 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:29:43,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:43,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:43,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:43,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:43,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:43,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:43,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:43,487 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:43,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:43,957 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:29:43,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:43,957 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:43,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:43,957 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:29:43,958 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:29:43,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:29:44,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-04 09:29:44,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:29:44,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:29:44,269 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-04 09:29:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:44,269 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:29:44,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:29:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:44,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:44,269 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:29:44,269 INFO L423 AbstractCegarLoop]: === Iteration 316 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:44,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:44,269 INFO L82 PathProgramCache]: Analyzing trace with hash -115640256, now seen corresponding path program 300 times [2018-10-04 09:29:44,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:44,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:44,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:44,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:44,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:44,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:44,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:44,345 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:29:44,355 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:29:44,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:44,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:44,359 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:44,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:44,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:44,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:44,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:44,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:44,385 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-04 09:29:44,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:44,830 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:29:44,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:44,831 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:44,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:44,831 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:29:44,831 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:29:44,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:29:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-10-04 09:29:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:45,170 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:45,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:45,170 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:45,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:45,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:45,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:45,170 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:45,170 INFO L423 AbstractCegarLoop]: === Iteration 317 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:45,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:45,171 INFO L82 PathProgramCache]: Analyzing trace with hash -115638334, now seen corresponding path program 301 times [2018-10-04 09:29:45,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:45,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:45,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:45,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:45,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:45,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:45,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:45,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:45,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:45,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:45,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:45,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:45,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:45,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:45,274 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:45,731 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:29:45,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:45,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:45,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:45,732 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:29:45,732 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:29:45,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:29:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-10-04 09:29:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:29:46,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:29:46,065 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:29:46,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:46,065 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:29:46,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:29:46,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:46,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:46,066 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:46,066 INFO L423 AbstractCegarLoop]: === Iteration 318 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:46,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:46,066 INFO L82 PathProgramCache]: Analyzing trace with hash -113793214, now seen corresponding path program 302 times [2018-10-04 09:29:46,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:46,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:46,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:46,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:46,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:46,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:46,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:46,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:29:46,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:29:46,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:46,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:46,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:46,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:46,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:46,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:46,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:46,201 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:29:46,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:46,635 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-04 09:29:46,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:46,636 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:46,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:46,636 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:29:46,636 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:29:46,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:29:46,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-10-04 09:29:46,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:46,972 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:46,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:46,972 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:46,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:46,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:46,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:46,972 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:29:46,972 INFO L423 AbstractCegarLoop]: === Iteration 319 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:46,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:46,972 INFO L82 PathProgramCache]: Analyzing trace with hash -113791292, now seen corresponding path program 303 times [2018-10-04 09:29:46,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:46,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:46,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:46,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:46,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:47,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:47,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:47,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:29:47,069 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:29:47,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:47,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:47,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:47,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:47,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:47,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:47,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:47,092 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:47,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:47,485 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-10-04 09:29:47,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:47,486 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:47,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:47,486 INFO L225 Difference]: With dead ends: 38 [2018-10-04 09:29:47,486 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 09:29:47,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:47,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 09:29:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-10-04 09:29:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:29:47,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-04 09:29:47,714 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-10-04 09:29:47,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:47,715 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-04 09:29:47,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-04 09:29:47,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:47,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:47,715 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-04 09:29:47,715 INFO L423 AbstractCegarLoop]: === Iteration 320 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:47,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:47,715 INFO L82 PathProgramCache]: Analyzing trace with hash 330139066, now seen corresponding path program 304 times [2018-10-04 09:29:47,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:47,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:47,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:47,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:47,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:47,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:47,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:47,796 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:29:47,823 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:29:47,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:47,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:47,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:47,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:47,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:47,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:47,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:47,858 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-10-04 09:29:48,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:48,704 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-04 09:29:48,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:48,705 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:48,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:48,705 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:29:48,705 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:29:48,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:29:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-04 09:29:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:49,120 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:49,120 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:49,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:49,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:49,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:49,121 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:29:49,121 INFO L423 AbstractCegarLoop]: === Iteration 321 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:49,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:49,121 INFO L82 PathProgramCache]: Analyzing trace with hash 330140988, now seen corresponding path program 305 times [2018-10-04 09:29:49,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:49,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:49,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:49,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:49,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:49,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:49,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:49,199 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:29:49,209 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:29:49,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:49,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:49,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:49,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:49,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:49,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:49,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:49,233 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:50,015 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-04 09:29:50,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:50,016 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:50,016 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:29:50,016 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:29:50,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:50,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:29:50,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-04 09:29:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:29:50,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:29:50,421 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:29:50,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:50,421 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:29:50,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:50,421 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:29:50,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:50,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:50,422 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:29:50,422 INFO L423 AbstractCegarLoop]: === Iteration 322 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:50,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:50,422 INFO L82 PathProgramCache]: Analyzing trace with hash 331986108, now seen corresponding path program 306 times [2018-10-04 09:29:50,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:50,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:50,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:50,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:50,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:50,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:50,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:50,499 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:29:50,509 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:29:50,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:50,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:50,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:50,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:50,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:50,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:50,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:50,533 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:29:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:51,269 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-04 09:29:51,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:51,269 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:51,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:51,270 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:29:51,270 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:29:51,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:29:51,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-04 09:29:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:51,650 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:51,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:51,650 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:51,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:51,650 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:51,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:51,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:51,650 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:51,650 INFO L423 AbstractCegarLoop]: === Iteration 323 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:51,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:51,651 INFO L82 PathProgramCache]: Analyzing trace with hash 331988030, now seen corresponding path program 307 times [2018-10-04 09:29:51,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:51,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:51,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:51,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:51,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:51,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:51,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:51,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:51,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:51,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:51,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:51,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:51,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:51,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:51,754 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:52,491 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:29:52,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:52,492 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:52,492 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:29:52,492 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:29:52,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:52,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:29:52,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-04 09:29:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:29:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:29:52,846 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-04 09:29:52,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:52,846 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:29:52,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:52,846 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:29:52,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:52,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:52,846 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:29:52,847 INFO L423 AbstractCegarLoop]: === Iteration 324 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:52,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:52,847 INFO L82 PathProgramCache]: Analyzing trace with hash 2105146428, now seen corresponding path program 308 times [2018-10-04 09:29:52,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:52,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:52,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:52,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:52,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:52,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:52,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:52,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:29:52,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:29:52,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:52,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:52,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:52,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:52,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:52,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:52,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:52,953 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-04 09:29:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:53,746 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-04 09:29:53,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:53,747 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:53,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:53,747 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:29:53,747 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:29:53,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:53,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:29:54,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-04 09:29:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:54,233 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:54,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:54,233 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:54,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:54,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:54,234 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:54,234 INFO L423 AbstractCegarLoop]: === Iteration 325 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:54,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:54,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2105148350, now seen corresponding path program 309 times [2018-10-04 09:29:54,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:54,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:54,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:54,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:54,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:54,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:54,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:54,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:29:54,322 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:29:54,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:54,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:54,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:54,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:54,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:54,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:54,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:54,346 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:55,123 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-04 09:29:55,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:55,124 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:55,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:55,124 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:29:55,124 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:29:55,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:55,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:29:55,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-04 09:29:55,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:29:55,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:29:55,511 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:29:55,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:55,512 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:29:55,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:55,512 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:29:55,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:55,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:55,512 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:55,512 INFO L423 AbstractCegarLoop]: === Iteration 326 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:55,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:55,512 INFO L82 PathProgramCache]: Analyzing trace with hash 2106993470, now seen corresponding path program 310 times [2018-10-04 09:29:55,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:55,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:55,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:55,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:55,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:55,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:55,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:55,587 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:29:55,594 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:29:55,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:55,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:55,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:55,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:55,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:55,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:55,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:55,618 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:29:56,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:56,361 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-04 09:29:56,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:56,361 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:56,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:56,361 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:29:56,362 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:29:56,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:29:56,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-04 09:29:56,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:56,739 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:56,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:56,739 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:56,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:56,739 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:56,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:56,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:56,739 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:29:56,739 INFO L423 AbstractCegarLoop]: === Iteration 327 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:56,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:56,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2106995392, now seen corresponding path program 311 times [2018-10-04 09:29:56,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:56,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:56,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:56,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:56,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:56,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:56,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:56,816 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:29:56,825 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:29:56,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:56,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:56,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:56,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:56,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:56,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:56,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:56,859 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:29:57,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:57,760 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:29:57,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:57,761 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:57,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:57,761 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:29:57,761 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:29:57,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:57,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:29:58,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-04 09:29:58,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:29:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:29:58,092 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-04 09:29:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:58,092 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:29:58,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:58,092 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:29:58,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:58,092 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:58,092 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:29:58,093 INFO L423 AbstractCegarLoop]: === Iteration 328 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:58,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:58,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1010197436, now seen corresponding path program 312 times [2018-10-04 09:29:58,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:58,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:58,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:58,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:58,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:58,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:58,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:58,169 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:29:58,178 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:29:58,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:58,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:58,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:58,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:58,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:58,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:58,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:58,204 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-04 09:29:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:58,976 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:29:58,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:29:58,977 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:29:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:58,977 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:29:58,977 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:29:58,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:29:59,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-04 09:29:59,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:29:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:29:59,365 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:29:59,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:59,365 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:29:59,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:29:59,365 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:29:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:29:59,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:59,365 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:29:59,365 INFO L423 AbstractCegarLoop]: === Iteration 329 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:59,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:59,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1010199358, now seen corresponding path program 313 times [2018-10-04 09:29:59,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:59,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:59,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:59,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:59,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:59,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:59,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:59,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:59,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:59,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:59,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:29:59,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:29:59,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:29:59,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:29:59,475 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:00,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:00,175 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:30:00,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:00,175 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:00,176 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:30:00,176 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:30:00,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:00,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:30:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-04 09:30:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:30:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:30:00,548 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:30:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:00,548 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:30:00,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:00,549 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:30:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:00,549 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:00,549 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:00,549 INFO L423 AbstractCegarLoop]: === Iteration 330 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:00,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:00,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1012044478, now seen corresponding path program 314 times [2018-10-04 09:30:00,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:00,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:00,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:00,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:00,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:00,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:00,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:00,626 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:00,632 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:00,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:00,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:00,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:00,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:00,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:00,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:00,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:00,657 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:30:01,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:01,407 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:30:01,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:01,408 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:01,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:01,408 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:30:01,408 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:30:01,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:01,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:30:01,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-04 09:30:01,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:01,816 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:01,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:01,816 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:01,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:01,816 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:01,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:01,817 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:01,817 INFO L423 AbstractCegarLoop]: === Iteration 331 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:01,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:01,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1012046400, now seen corresponding path program 315 times [2018-10-04 09:30:01,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:01,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:01,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:01,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:01,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:01,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:01,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:01,908 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:01,919 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:30:01,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:01,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:01,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:01,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:01,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:01,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:01,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:01,943 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:02,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:02,648 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:30:02,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:02,649 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:02,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:02,649 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:30:02,649 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:30:02,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:02,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:30:03,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-04 09:30:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:30:03,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:30:03,005 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-04 09:30:03,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:03,005 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:30:03,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:03,005 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:30:03,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:03,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:03,005 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:03,005 INFO L423 AbstractCegarLoop]: === Iteration 332 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:03,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:03,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1509762498, now seen corresponding path program 316 times [2018-10-04 09:30:03,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:03,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:03,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:03,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:03,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:03,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:03,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:03,100 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:03,107 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:03,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:03,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:03,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:03,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:03,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:03,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:03,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:03,130 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-04 09:30:03,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:03,802 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:30:03,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:03,803 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:03,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:03,803 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:30:03,803 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:30:03,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:30:04,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-04 09:30:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:04,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:04,195 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:04,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:04,195 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:04,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:04,195 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:04,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:04,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:04,196 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:04,196 INFO L423 AbstractCegarLoop]: === Iteration 333 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:04,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:04,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1509760576, now seen corresponding path program 317 times [2018-10-04 09:30:04,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:04,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:04,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:04,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:04,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:04,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:04,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:04,272 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:04,282 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:30:04,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:04,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:04,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:04,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:04,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:04,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:04,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:04,305 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:05,013 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:30:05,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:05,014 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:05,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:05,014 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:30:05,014 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:30:05,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:05,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:30:05,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-04 09:30:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:30:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:30:05,420 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:30:05,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:05,420 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:30:05,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:30:05,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:05,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:05,420 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:05,420 INFO L423 AbstractCegarLoop]: === Iteration 334 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:05,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:05,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1507915456, now seen corresponding path program 318 times [2018-10-04 09:30:05,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:05,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:05,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:05,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:05,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:05,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:05,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:05,501 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:05,516 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:30:05,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:05,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:05,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:05,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:05,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:05,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:05,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:05,539 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:30:06,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:06,181 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:30:06,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:06,182 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:06,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:06,182 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:30:06,182 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:30:06,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:06,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:30:06,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-04 09:30:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:06,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:06,572 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:06,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:06,572 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:06,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:06,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:06,573 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:06,573 INFO L423 AbstractCegarLoop]: === Iteration 335 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:06,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:06,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1507913534, now seen corresponding path program 319 times [2018-10-04 09:30:06,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:06,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:06,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:06,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:06,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:06,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:06,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:06,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:06,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:06,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:06,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:06,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:06,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:06,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:06,700 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:07,333 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:30:07,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:07,333 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:07,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:07,333 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:30:07,334 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:30:07,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:07,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:30:07,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-04 09:30:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:30:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:30:07,637 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-04 09:30:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:07,637 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:30:07,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:30:07,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:07,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:07,637 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:30:07,638 INFO L423 AbstractCegarLoop]: === Iteration 336 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:07,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1031203644, now seen corresponding path program 320 times [2018-10-04 09:30:07,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:07,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:07,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:07,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:07,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:07,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:07,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:07,717 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:07,732 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:07,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:07,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:07,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:07,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:07,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:07,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:07,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:07,755 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-04 09:30:08,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:08,596 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-04 09:30:08,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:08,597 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:08,597 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:30:08,597 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:30:08,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:08,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:30:08,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-04 09:30:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:09,000 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:09,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:09,000 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:09,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:09,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:09,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:09,000 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:09,000 INFO L423 AbstractCegarLoop]: === Iteration 337 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:09,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:09,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1031205566, now seen corresponding path program 321 times [2018-10-04 09:30:09,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:09,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:09,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:09,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:09,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:09,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:09,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:09,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:09,087 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:30:09,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:09,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:09,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:09,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:09,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:09,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:09,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:09,112 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:09,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:09,951 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-04 09:30:09,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:09,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:09,951 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:30:09,952 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:30:09,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:09,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:30:10,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-04 09:30:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:30:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:30:10,335 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:30:10,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:10,335 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:30:10,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:10,335 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:30:10,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:10,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:10,336 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:10,336 INFO L423 AbstractCegarLoop]: === Iteration 338 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:10,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:10,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1033050686, now seen corresponding path program 322 times [2018-10-04 09:30:10,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:10,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:10,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:10,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:10,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:10,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:10,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:10,421 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:10,428 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:10,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:10,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:10,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:10,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:10,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:10,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:10,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:10,453 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:30:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:11,238 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-04 09:30:11,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:11,239 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:11,239 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:30:11,239 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:30:11,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:11,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:30:11,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-04 09:30:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:11,675 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:11,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:11,675 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:11,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:11,675 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:11,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:11,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:11,676 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:11,676 INFO L423 AbstractCegarLoop]: === Iteration 339 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:11,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:11,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1033052608, now seen corresponding path program 323 times [2018-10-04 09:30:11,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:11,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:11,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:11,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:11,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:11,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:11,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:11,740 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:11,750 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:30:11,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:11,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:11,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:11,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:11,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:11,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:11,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:11,774 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:12,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:12,529 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:30:12,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:12,530 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:12,530 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:30:12,530 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:30:12,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:30:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-04 09:30:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:30:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:30:12,932 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-04 09:30:12,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:12,933 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:30:12,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:30:12,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:12,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:12,933 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:12,933 INFO L423 AbstractCegarLoop]: === Iteration 340 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:12,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:12,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1488756290, now seen corresponding path program 324 times [2018-10-04 09:30:12,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:12,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:12,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:12,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:12,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:13,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:13,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:13,016 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:13,136 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:30:13,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:13,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:13,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:13,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:13,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:13,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:13,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:13,164 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-04 09:30:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:13,980 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-04 09:30:13,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:13,981 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:13,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:13,981 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:30:13,981 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:30:13,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:13,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:30:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-04 09:30:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:14,397 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:14,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:14,398 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:14,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:14,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:14,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:14,398 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:14,398 INFO L423 AbstractCegarLoop]: === Iteration 341 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:14,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:14,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1488754368, now seen corresponding path program 325 times [2018-10-04 09:30:14,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:14,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:14,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:14,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:14,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:14,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:14,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:14,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:14,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:14,484 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:14,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:14,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:14,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:14,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:14,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:14,504 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:15,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:15,370 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-04 09:30:15,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:15,371 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:15,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:15,371 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:30:15,371 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:30:15,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:15,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:30:15,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-04 09:30:15,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:30:15,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:30:15,758 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:30:15,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:15,758 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:30:15,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:15,758 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:30:15,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:15,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:15,758 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:15,758 INFO L423 AbstractCegarLoop]: === Iteration 342 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:15,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:15,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1486909248, now seen corresponding path program 326 times [2018-10-04 09:30:15,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:15,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:15,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:15,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:15,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:15,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:15,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:15,832 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:15,838 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:15,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:15,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:15,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:15,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:15,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:15,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:15,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:15,862 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:30:16,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:16,663 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-04 09:30:16,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:16,663 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:16,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:16,663 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:30:16,664 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:30:16,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:16,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:30:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-04 09:30:17,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:17,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:17,057 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:17,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:17,057 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:17,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:17,058 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:17,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:17,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:17,058 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:17,058 INFO L423 AbstractCegarLoop]: === Iteration 343 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:17,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:17,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1486907326, now seen corresponding path program 327 times [2018-10-04 09:30:17,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:17,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:17,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:17,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:17,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:17,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:17,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:17,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:17,152 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:30:17,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:17,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:17,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:17,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:17,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:17,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:17,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:17,188 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:17,944 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:30:17,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:17,945 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:17,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:17,945 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:30:17,945 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:30:17,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:17,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:30:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-04 09:30:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:30:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:30:18,312 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-04 09:30:18,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:18,312 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:30:18,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:18,312 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:30:18,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:18,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:18,312 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:18,312 INFO L423 AbstractCegarLoop]: === Iteration 344 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:18,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:18,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1711262014, now seen corresponding path program 328 times [2018-10-04 09:30:18,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:18,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:18,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:18,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:18,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:18,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:18,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:18,631 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:18,637 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:18,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:18,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:18,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:18,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:18,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:18,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:18,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:18,667 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-04 09:30:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:19,497 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:30:19,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:19,498 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:19,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:19,498 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:30:19,498 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:30:19,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:30:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-04 09:30:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:19,908 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:19,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:19,908 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:19,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:19,908 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:19,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:19,909 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:19,909 INFO L423 AbstractCegarLoop]: === Iteration 345 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:19,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:19,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1711263936, now seen corresponding path program 329 times [2018-10-04 09:30:19,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:19,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:19,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:19,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:19,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:19,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:19,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:19,982 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:19,992 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:30:19,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:19,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:20,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:20,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:20,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:20,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:20,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:20,015 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:20,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:20,724 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:30:20,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:20,725 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:20,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:20,725 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:30:20,725 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:30:20,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:20,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:30:21,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-04 09:30:21,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:30:21,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:30:21,114 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:30:21,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:21,114 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:30:21,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:21,114 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:30:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:21,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:21,114 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:21,115 INFO L423 AbstractCegarLoop]: === Iteration 346 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:21,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:21,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1713109056, now seen corresponding path program 330 times [2018-10-04 09:30:21,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:21,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:21,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:21,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:21,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:21,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:21,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:21,190 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:21,199 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:30:21,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:21,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:21,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:21,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:21,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:21,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:21,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:21,223 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:30:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:21,988 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-04 09:30:21,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:21,988 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:21,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:21,988 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:30:21,989 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:30:21,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:30:22,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-04 09:30:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:22,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:22,400 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:22,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:22,400 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:22,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:22,400 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:22,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:22,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:22,400 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:22,400 INFO L423 AbstractCegarLoop]: === Iteration 347 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:22,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:22,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1713110978, now seen corresponding path program 331 times [2018-10-04 09:30:22,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:22,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:22,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:22,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:22,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:22,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:22,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:22,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:22,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:22,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:22,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:22,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:22,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:22,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:22,507 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:23,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:23,258 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:30:23,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:23,259 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:23,259 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:30:23,259 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:30:23,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:23,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:30:23,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-04 09:30:23,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:30:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:30:23,640 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-04 09:30:23,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:23,640 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:30:23,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:23,640 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:30:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:23,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:23,640 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:23,640 INFO L423 AbstractCegarLoop]: === Iteration 348 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:23,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:23,641 INFO L82 PathProgramCache]: Analyzing trace with hash -808697920, now seen corresponding path program 332 times [2018-10-04 09:30:23,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:23,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:23,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:23,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:23,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:23,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:23,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:23,716 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:23,725 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:23,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:23,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:23,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:23,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:23,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:23,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:23,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:23,747 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-04 09:30:24,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:24,456 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:30:24,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:24,457 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:24,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:24,457 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:30:24,457 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:30:24,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:24,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:30:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-04 09:30:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:24,895 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:24,895 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:24,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:24,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:24,895 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:24,895 INFO L423 AbstractCegarLoop]: === Iteration 349 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:24,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:24,896 INFO L82 PathProgramCache]: Analyzing trace with hash -808695998, now seen corresponding path program 333 times [2018-10-04 09:30:24,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:24,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:24,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:24,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:24,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:24,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:24,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:24,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:24,978 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:30:24,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:24,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:25,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:25,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:25,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:25,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:25,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:25,004 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:25,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:25,724 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:30:25,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:25,724 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:25,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:25,725 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:30:25,725 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:30:25,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:30:26,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-04 09:30:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:30:26,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:30:26,144 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:30:26,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:26,144 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:30:26,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:26,144 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:30:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:26,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:26,144 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:26,144 INFO L423 AbstractCegarLoop]: === Iteration 350 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:26,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:26,144 INFO L82 PathProgramCache]: Analyzing trace with hash -806850878, now seen corresponding path program 334 times [2018-10-04 09:30:26,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:26,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:26,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:26,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:26,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:26,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:26,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:26,227 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:26,233 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:26,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:26,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:26,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:26,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:26,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:26,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:26,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:26,256 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:30:26,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:26,933 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:30:26,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:26,933 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:26,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:26,933 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:30:26,934 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:30:26,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:26,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:30:27,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-04 09:30:27,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:27,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:27,364 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:27,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:27,364 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:27,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:27,365 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:27,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:27,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:27,365 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:30:27,365 INFO L423 AbstractCegarLoop]: === Iteration 351 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:27,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:27,365 INFO L82 PathProgramCache]: Analyzing trace with hash -806848956, now seen corresponding path program 335 times [2018-10-04 09:30:27,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:27,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:27,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:27,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:27,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:27,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:27,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:27,563 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:27,573 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:30:27,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:27,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:27,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:27,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:27,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:27,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:27,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:27,598 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:28,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:28,236 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:30:28,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:28,236 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:28,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:28,236 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:30:28,237 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:30:28,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:28,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:30:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-10-04 09:30:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:30:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-04 09:30:28,536 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-10-04 09:30:28,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:28,536 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-04 09:30:28,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-04 09:30:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:28,537 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:28,537 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:30:28,537 INFO L423 AbstractCegarLoop]: === Iteration 352 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:28,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:28,537 INFO L82 PathProgramCache]: Analyzing trace with hash -256666948, now seen corresponding path program 336 times [2018-10-04 09:30:28,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:28,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:28,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:28,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:28,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:28,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:28,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:28,612 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:28,622 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:30:28,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:28,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:28,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:28,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:28,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:28,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:28,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:28,646 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-10-04 09:30:29,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:29,404 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:30:29,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:29,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:29,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:29,405 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:30:29,405 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:30:29,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:29,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:30:29,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-04 09:30:29,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:29,828 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:29,828 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:29,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:29,828 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:29,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:29,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:29,828 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:29,828 INFO L423 AbstractCegarLoop]: === Iteration 353 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:29,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:29,829 INFO L82 PathProgramCache]: Analyzing trace with hash -256665026, now seen corresponding path program 337 times [2018-10-04 09:30:29,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:29,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:29,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:29,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:29,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:29,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:29,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:29,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:29,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:29,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:29,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:29,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:29,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:29,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:29,935 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:30,662 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:30:30,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:30,662 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:30,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:30,663 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:30:30,663 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:30:30,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:30,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:30:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-04 09:30:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:30:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:30:31,076 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:30:31,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:31,076 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:30:31,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:31,076 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:30:31,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:31,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:31,076 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:31,077 INFO L423 AbstractCegarLoop]: === Iteration 354 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:31,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:31,077 INFO L82 PathProgramCache]: Analyzing trace with hash -254819906, now seen corresponding path program 338 times [2018-10-04 09:30:31,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:31,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:31,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:31,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:31,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:31,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:31,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:31,187 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:31,195 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:31,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:31,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:31,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:31,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:31,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:31,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:31,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:31,217 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:30:31,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:31,999 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:30:31,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:31,999 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:31,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:31,999 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:30:32,000 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:30:32,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:32,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:30:32,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-04 09:30:32,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:32,416 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:32,416 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:32,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:32,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:32,417 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:32,417 INFO L423 AbstractCegarLoop]: === Iteration 355 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:32,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:32,417 INFO L82 PathProgramCache]: Analyzing trace with hash -254817984, now seen corresponding path program 339 times [2018-10-04 09:30:32,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:32,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:32,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:32,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:32,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:32,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:32,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:32,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:32,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:30:32,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:32,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:32,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:32,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:32,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:32,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:32,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:32,590 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:33,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:33,308 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:30:33,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:33,308 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:33,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:33,308 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:30:33,309 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:30:33,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:33,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:30:33,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-04 09:30:33,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:30:33,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:30:33,707 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-04 09:30:33,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:33,707 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:30:33,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:33,707 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:30:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:33,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:33,707 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:33,707 INFO L423 AbstractCegarLoop]: === Iteration 356 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:33,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:33,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1518340414, now seen corresponding path program 340 times [2018-10-04 09:30:33,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:33,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:33,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:33,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:33,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:33,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:33,775 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:33,795 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:33,821 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:33,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:33,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:33,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:33,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:33,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:33,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:33,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:33,854 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-04 09:30:34,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:34,577 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:30:34,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:34,578 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:34,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:34,578 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:30:34,578 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:30:34,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:34,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:30:35,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-04 09:30:35,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:35,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:35,022 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:35,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:35,022 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:35,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:35,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:35,022 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:35,023 INFO L423 AbstractCegarLoop]: === Iteration 357 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:35,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:35,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1518342336, now seen corresponding path program 341 times [2018-10-04 09:30:35,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:35,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:35,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:35,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:35,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:35,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:35,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:35,102 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:35,112 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:30:35,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:35,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:35,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:35,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:35,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:35,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:35,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:35,136 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:35,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:35,840 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:30:35,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:35,840 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:35,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:35,841 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:30:35,841 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:30:35,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:30:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-04 09:30:36,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:30:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:30:36,266 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:30:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:36,266 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:30:36,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:30:36,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:36,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:36,266 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:36,266 INFO L423 AbstractCegarLoop]: === Iteration 358 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:36,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:36,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1520187456, now seen corresponding path program 342 times [2018-10-04 09:30:36,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:36,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:36,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:36,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:36,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:36,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:36,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:36,350 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:36,361 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:30:36,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:36,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:36,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:36,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:36,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:36,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:36,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:36,385 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:30:37,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:37,040 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:30:37,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:37,040 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:37,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:37,040 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:30:37,041 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:30:37,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:37,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:30:37,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-04 09:30:37,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:37,484 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:37,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:37,485 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:37,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:37,485 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:37,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:37,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:37,485 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:37,485 INFO L423 AbstractCegarLoop]: === Iteration 359 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:37,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:37,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1520189378, now seen corresponding path program 343 times [2018-10-04 09:30:37,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:37,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:37,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:37,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:37,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:37,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:37,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:37,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:37,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:37,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:37,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:37,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:37,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:37,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:37,595 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:38,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:38,225 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:30:38,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:38,225 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:38,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:38,226 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:30:38,226 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:30:38,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:30:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-04 09:30:38,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:30:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:30:38,591 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-04 09:30:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:38,591 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:30:38,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:30:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:38,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:38,591 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:38,592 INFO L423 AbstractCegarLoop]: === Iteration 360 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:38,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:38,592 INFO L82 PathProgramCache]: Analyzing trace with hash 423391422, now seen corresponding path program 344 times [2018-10-04 09:30:38,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:38,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:38,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:38,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:38,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:38,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:38,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:38,667 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:38,674 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:38,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:38,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:38,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:38,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:38,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:38,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:38,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:38,699 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-04 09:30:39,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:39,453 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:30:39,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:39,453 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:39,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:39,453 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:30:39,454 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:30:39,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:39,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:30:39,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-04 09:30:39,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:39,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:39,885 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:39,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:39,885 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:39,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:39,885 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:39,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:39,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:39,885 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:39,885 INFO L423 AbstractCegarLoop]: === Iteration 361 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:39,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:39,886 INFO L82 PathProgramCache]: Analyzing trace with hash 423393344, now seen corresponding path program 345 times [2018-10-04 09:30:39,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:39,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:39,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:39,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:39,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:39,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:39,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:39,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:39,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:30:39,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:39,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:40,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:40,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:40,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:40,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:40,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:40,004 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:40,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:40,748 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:30:40,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:40,749 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:40,749 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:30:40,749 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:30:40,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:40,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:30:41,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-04 09:30:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:30:41,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:30:41,173 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:30:41,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:41,173 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:30:41,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:41,173 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:30:41,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:41,173 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:41,173 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:41,173 INFO L423 AbstractCegarLoop]: === Iteration 362 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:41,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:41,174 INFO L82 PathProgramCache]: Analyzing trace with hash 425238464, now seen corresponding path program 346 times [2018-10-04 09:30:41,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:41,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:41,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:41,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:41,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:41,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:41,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:41,247 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:41,254 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:41,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:41,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:41,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:41,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:41,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:41,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:41,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:41,286 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:30:42,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:42,081 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-04 09:30:42,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:42,081 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:42,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:42,082 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:30:42,082 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:30:42,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:42,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:30:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-04 09:30:42,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:42,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:42,533 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:42,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:42,533 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:42,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:42,533 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:42,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:42,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:42,533 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:42,533 INFO L423 AbstractCegarLoop]: === Iteration 363 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:42,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:42,533 INFO L82 PathProgramCache]: Analyzing trace with hash 425240386, now seen corresponding path program 347 times [2018-10-04 09:30:42,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:42,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:42,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:42,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:42,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:42,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:42,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:42,619 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:42,629 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:30:42,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:42,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:42,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:42,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:42,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:42,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:42,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:42,652 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:43,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:43,411 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-04 09:30:43,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:43,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:43,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:43,412 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:30:43,412 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:30:43,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:43,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:30:43,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-04 09:30:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:30:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:30:43,838 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-04 09:30:43,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:43,838 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:30:43,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:43,838 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:30:43,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:43,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:43,838 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:43,838 INFO L423 AbstractCegarLoop]: === Iteration 364 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:43,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:43,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2096568512, now seen corresponding path program 348 times [2018-10-04 09:30:43,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:43,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:43,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:43,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:43,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:43,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:43,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:43,912 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:43,922 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:30:43,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:43,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:43,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:43,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:43,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:43,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:43,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:43,946 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-04 09:30:44,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:44,656 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:30:44,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:44,656 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:44,656 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:30:44,656 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:30:44,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:44,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:30:45,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-04 09:30:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:45,107 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:45,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:45,107 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:45,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:45,107 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:45,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:45,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:45,108 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:45,108 INFO L423 AbstractCegarLoop]: === Iteration 365 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:45,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:45,108 INFO L82 PathProgramCache]: Analyzing trace with hash -2096566590, now seen corresponding path program 349 times [2018-10-04 09:30:45,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:45,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:45,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:45,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:45,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:45,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:45,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:45,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:45,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:45,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:45,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:45,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:45,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:45,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:45,208 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:45,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:45,914 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-04 09:30:45,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:45,915 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:45,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:45,915 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:30:45,915 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:30:45,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:45,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:30:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-04 09:30:46,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:30:46,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:30:46,334 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:30:46,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:46,334 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:30:46,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:46,335 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:30:46,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:46,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:46,335 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:46,335 INFO L423 AbstractCegarLoop]: === Iteration 366 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:46,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:46,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2094721470, now seen corresponding path program 350 times [2018-10-04 09:30:46,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:46,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:46,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:46,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:46,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:46,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:46,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:46,413 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:46,419 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:46,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:46,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:46,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:46,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:46,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:46,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:46,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:46,441 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:30:47,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:47,118 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:30:47,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:47,119 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:47,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:47,119 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:30:47,119 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:30:47,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:47,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:30:47,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-04 09:30:47,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:47,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:47,561 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:47,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:47,561 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:47,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:47,561 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:47,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:47,561 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:47,561 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:30:47,561 INFO L423 AbstractCegarLoop]: === Iteration 367 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:47,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:47,562 INFO L82 PathProgramCache]: Analyzing trace with hash -2094719548, now seen corresponding path program 351 times [2018-10-04 09:30:47,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:47,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:47,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:47,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:47,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:47,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:47,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:47,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:47,704 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:30:47,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:47,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:47,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:47,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:47,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:47,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:47,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:47,729 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:48,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:48,354 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:30:48,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:48,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:48,355 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:30:48,355 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:30:48,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:48,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:30:48,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-04 09:30:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:30:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-04 09:30:48,680 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-04 09:30:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:48,680 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-04 09:30:48,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-04 09:30:48,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:48,680 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:48,680 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:48,680 INFO L423 AbstractCegarLoop]: === Iteration 368 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:48,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:48,681 INFO L82 PathProgramCache]: Analyzing trace with hash 444397630, now seen corresponding path program 352 times [2018-10-04 09:30:48,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:48,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:48,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:48,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:48,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:48,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:48,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:48,756 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:48,762 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:48,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:48,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:48,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:48,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:48,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:48,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:48,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:48,786 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-04 09:30:49,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:49,443 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:30:49,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:49,443 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:49,443 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:30:49,444 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:30:49,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:49,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:30:49,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-04 09:30:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:49,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:49,928 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:49,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:49,928 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:49,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:49,928 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:49,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:49,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:49,928 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:49,929 INFO L423 AbstractCegarLoop]: === Iteration 369 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:49,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:49,929 INFO L82 PathProgramCache]: Analyzing trace with hash 444399552, now seen corresponding path program 353 times [2018-10-04 09:30:49,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:49,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:49,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:49,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:49,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:50,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:50,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:50,012 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:50,022 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:30:50,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:50,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:50,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:50,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:50,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:50,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:50,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:50,054 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:50,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:50,728 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:30:50,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:50,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:50,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:50,729 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:30:50,729 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:30:50,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:50,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:30:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-04 09:30:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:30:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:30:51,202 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:30:51,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:51,202 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:30:51,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:30:51,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:51,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:51,203 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:51,203 INFO L423 AbstractCegarLoop]: === Iteration 370 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:51,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:51,203 INFO L82 PathProgramCache]: Analyzing trace with hash 446244672, now seen corresponding path program 354 times [2018-10-04 09:30:51,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:51,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:51,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:51,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:51,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:51,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:51,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:51,279 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:51,288 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:30:51,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:51,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:51,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:51,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:51,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:51,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:51,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:51,313 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:30:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:51,943 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:30:51,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:51,944 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:51,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:51,944 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:30:51,944 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:30:51,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:51,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:30:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-04 09:30:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:52,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:52,429 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:52,430 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:52,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:52,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:52,430 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:52,430 INFO L423 AbstractCegarLoop]: === Iteration 371 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:52,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:52,430 INFO L82 PathProgramCache]: Analyzing trace with hash 446246594, now seen corresponding path program 355 times [2018-10-04 09:30:52,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:52,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:52,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:52,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:52,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:52,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:52,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:52,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:52,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:52,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:52,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:52,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:52,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:52,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:52,599 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:53,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:53,221 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:30:53,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:53,222 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:53,222 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:30:53,222 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:30:53,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:30:53,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-04 09:30:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:30:53,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:30:53,637 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-04 09:30:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:53,637 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:30:53,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:53,637 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:30:53,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:53,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:53,637 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:53,638 INFO L423 AbstractCegarLoop]: === Iteration 372 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:53,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:53,638 INFO L82 PathProgramCache]: Analyzing trace with hash -2075562304, now seen corresponding path program 356 times [2018-10-04 09:30:53,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:53,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:53,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:53,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:53,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:53,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:53,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:53,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:53,719 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:53,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:53,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:53,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:53,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:53,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:53,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:53,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:53,743 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-04 09:30:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:54,437 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:30:54,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:54,438 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:54,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:54,438 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:30:54,438 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:30:54,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:54,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:30:54,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-04 09:30:54,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:54,894 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:54,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:54,894 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:54,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:54,894 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:54,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:54,894 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:54,894 INFO L423 AbstractCegarLoop]: === Iteration 373 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:54,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:54,895 INFO L82 PathProgramCache]: Analyzing trace with hash -2075560382, now seen corresponding path program 357 times [2018-10-04 09:30:54,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:54,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:54,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:54,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:54,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:54,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:54,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:54,970 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:54,980 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:30:54,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:54,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:55,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:55,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:55,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:55,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:55,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:55,002 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:55,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:55,690 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-04 09:30:55,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:55,691 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:55,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:55,691 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:30:55,691 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:30:55,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:55,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:30:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-04 09:30:56,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:30:56,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:30:56,125 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:30:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:56,126 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:30:56,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:56,126 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:30:56,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:56,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:56,126 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:56,126 INFO L423 AbstractCegarLoop]: === Iteration 374 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:56,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:56,126 INFO L82 PathProgramCache]: Analyzing trace with hash -2073715262, now seen corresponding path program 358 times [2018-10-04 09:30:56,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:56,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:56,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:56,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:56,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:56,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:56,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:56,207 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:56,213 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:56,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:56,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:56,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:56,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:56,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:56,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:56,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:56,236 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:30:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:56,891 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-04 09:30:56,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:56,892 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:56,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:56,892 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:30:56,892 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:30:56,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:30:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-04 09:30:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:57,374 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:57,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:57,375 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:57,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:57,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:57,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:57,375 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:30:57,375 INFO L423 AbstractCegarLoop]: === Iteration 375 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:57,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:57,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2073713340, now seen corresponding path program 359 times [2018-10-04 09:30:57,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:57,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:57,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:57,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:57,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:57,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:57,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:57,464 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:57,475 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:30:57,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:57,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:57,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:57,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:57,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:57,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:57,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:57,500 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:30:58,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:58,123 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:30:58,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:58,123 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:58,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:58,124 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:30:58,124 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:30:58,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:58,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:30:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-04 09:30:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:30:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-04 09:30:58,510 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-04 09:30:58,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:58,510 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-04 09:30:58,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:58,510 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-04 09:30:58,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:58,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:58,511 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-04 09:30:58,511 INFO L423 AbstractCegarLoop]: === Iteration 376 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:58,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:58,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1124456000, now seen corresponding path program 360 times [2018-10-04 09:30:58,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:58,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:58,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:58,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:58,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:58,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:58,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:58,586 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:58,596 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:30:58,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:58,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:58,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:58,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:58,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:58,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:58,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:58,621 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-04 09:30:59,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:59,226 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:30:59,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:59,227 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:30:59,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:59,227 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:30:59,227 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:30:59,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:30:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-04 09:30:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:30:59,677 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:30:59,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:59,677 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:30:59,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:59,677 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:30:59,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:59,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:59,677 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:30:59,678 INFO L423 AbstractCegarLoop]: === Iteration 377 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:59,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:59,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1124457922, now seen corresponding path program 361 times [2018-10-04 09:30:59,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:59,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:59,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:59,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:59,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:59,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:59,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:59,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:59,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:59,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:59,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:59,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:59,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:59,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:59,787 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:31:00,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:00,397 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:31:00,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:31:00,398 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:31:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:00,398 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:31:00,398 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:31:00,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:31:00,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:31:00,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-04 09:31:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:31:00,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-04 09:31:00,875 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-04 09:31:00,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:00,876 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-04 09:31:00,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:31:00,876 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-04 09:31:00,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:31:00,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:00,876 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:31:00,876 INFO L423 AbstractCegarLoop]: === Iteration 378 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:00,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:00,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1126303042, now seen corresponding path program 362 times [2018-10-04 09:31:00,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:00,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:00,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:00,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:31:00,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:00,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:00,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:31:00,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:31:00,965 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:31:00,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:00,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:00,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:00,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:31:00,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:31:00,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:31:00,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:31:00,987 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-04 09:31:01,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:01,700 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-04 09:31:01,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:31:01,701 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:31:01,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:01,701 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:31:01,701 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:31:01,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:31:01,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:31:02,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-04 09:31:02,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:31:02,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:31:02,166 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:31:02,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:02,166 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:31:02,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:31:02,167 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:31:02,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:31:02,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:02,167 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:31:02,167 INFO L423 AbstractCegarLoop]: === Iteration 379 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:02,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:02,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1126304964, now seen corresponding path program 363 times [2018-10-04 09:31:02,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:02,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:02,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:02,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:02,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:02,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:02,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:31:02,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:31:02,252 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:31:02,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:02,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:02,256 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:02,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:02,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:31:02,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:31:02,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:31:02,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:31:02,276 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-04 09:31:02,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:02,854 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-04 09:31:02,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:31:02,854 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:31:02,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:02,855 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:31:02,855 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:31:02,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:31:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:31:03,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-04 09:31:03,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:31:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-04 09:31:03,305 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-04 09:31:03,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:03,305 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-04 09:31:03,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:31:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-04 09:31:03,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:31:03,305 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:03,306 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-04 09:31:03,306 INFO L423 AbstractCegarLoop]: === Iteration 380 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:03,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:03,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1395503934, now seen corresponding path program 364 times [2018-10-04 09:31:03,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:03,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:03,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:03,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:03,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:03,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:03,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:31:03,385 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:31:03,390 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:31:03,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:03,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:03,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:03,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:31:03,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:31:03,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:31:03,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:31:03,416 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-04 09:31:03,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:03,967 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-04 09:31:03,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:31:03,968 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-04 09:31:03,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:03,968 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:31:03,968 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:31:03,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:31:03,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:31:04,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-10-04 09:31:04,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:31:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-04 09:31:04,448 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-04 09:31:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:04,448 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-04 09:31:04,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:31:04,448 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-04 09:31:04,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:31:04,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:04,449 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-04 09:31:04,449 INFO L423 AbstractCegarLoop]: === Iteration 381 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:04,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1395502012, now seen corresponding path program 365 times [2018-10-04 09:31:04,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:04,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:04,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:04,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:04,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:04,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:04,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:31:04,526 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:31:04,537 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:31:04,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:04,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:04,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:04,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:31:04,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:31:04,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:31:04,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:31:04,562 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. Received shutdown request... [2018-10-04 09:31:04,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:31:04,652 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:31:04,658 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:31:04,658 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:31:04 BoogieIcfgContainer [2018-10-04 09:31:04,658 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:31:04,659 INFO L168 Benchmark]: Toolchain (without parser) took 259537.74 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -431.0 MB). Free memory was 1.4 GB in the beginning and 932.9 MB in the end (delta: 515.0 MB). Peak memory consumption was 84.0 MB. Max. memory is 7.1 GB. [2018-10-04 09:31:04,661 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:31:04,661 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:31:04,661 INFO L168 Benchmark]: Boogie Preprocessor took 22.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:31:04,662 INFO L168 Benchmark]: RCFGBuilder took 235.47 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:31:04,662 INFO L168 Benchmark]: TraceAbstraction took 259234.24 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -431.0 MB). Free memory was 1.4 GB in the beginning and 932.9 MB in the end (delta: 493.8 MB). Peak memory consumption was 62.9 MB. Max. memory is 7.1 GB. [2018-10-04 09:31:04,664 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 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 235.47 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 259234.24 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -431.0 MB). Free memory was 1.4 GB in the beginning and 932.9 MB in the end (delta: 493.8 MB). Peak memory consumption was 62.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 29]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 29). Cancelled while BasicCegarLoop was constructing difference of abstraction (34states) and FLOYD_HOARE automaton (currently 5 states, 11 states before enhancement), while ReachableStatesComputation was computing reachable states (7 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 259.1s OverallTime, 381 OverallIterations, 8 TraceHistogramMax, 135.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1524 SDtfs, 2923 SDslu, 5223 SDs, 0 SdLazy, 8862 SolverSat, 4916 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9160 GetRequests, 6233 SyntacticMatches, 0 SemanticMatches, 2927 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=256, 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: 68.2s AutomataMinimizationTime, 380 MinimizatonAttempts, 5648 StatesRemovedByMinimization, 380 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 38.0s InterpolantComputationTime, 12467 NumberOfCodeBlocks, 12467 NumberOfCodeBlocksAsserted, 2157 NumberOfCheckSat, 11706 ConstructedInterpolants, 0 QuantifiedInterpolants, 534792 SizeOfPredicates, 380 NumberOfNonLiveVariables, 16150 ConjunctsInSsa, 3306 ConjunctsInUnsatCore, 761 InterpolantComputations, 1 PerfectInterpolantSequences, 0/35572 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/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-31-04-673.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-31-04-673.csv Completed graceful shutdown