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/HierarchicalTraceAbstraction/GeometricalCake.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:53:02,828 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:53:02,830 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:53:02,849 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:53:02,849 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:53:02,850 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:53:02,852 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:53:02,855 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:53:02,857 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:53:02,858 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:53:02,862 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 19:53:02,862 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 19:53:02,863 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 19:53:02,864 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 19:53:02,865 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 19:53:02,866 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 19:53:02,866 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 19:53:02,868 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 19:53:02,870 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 19:53:02,872 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 19:53:02,873 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 19:53:02,874 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 19:53:02,876 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-23 19:53:02,884 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:53:02,903 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:53:02,903 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:53:02,904 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:53:02,904 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:53:02,909 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:53:02,909 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:53:02,909 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:53:02,910 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:53:02,910 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:53:02,910 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:53:02,910 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:53:02,910 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:53:02,912 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:53:02,912 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:53:02,912 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:53:02,913 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:53:02,913 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:53:02,913 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:53:02,913 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:53:02,914 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:53:02,914 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:53:02,915 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:53:02,915 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:53:02,915 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:53:02,915 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:53:02,915 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:53:02,916 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:53:02,916 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:53:02,916 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:53:02,916 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:53:02,958 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:53:02,973 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:53:02,979 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:53:02,981 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:53:02,982 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:53:02,983 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/GeometricalCake.bpl [2018-09-23 19:53:02,983 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/GeometricalCake.bpl' [2018-09-23 19:53:03,026 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:53:03,030 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:53:03,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:53:03,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:53:03,031 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:53:03,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:03" (1/1) ... [2018-09-23 19:53:03,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:03" (1/1) ... [2018-09-23 19:53:03,073 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 19:53:03,073 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 19:53:03,073 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 19:53:03,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:53:03,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:53:03,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:53:03,077 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:53:03,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:03" (1/1) ... [2018-09-23 19:53:03,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:03" (1/1) ... [2018-09-23 19:53:03,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:03" (1/1) ... [2018-09-23 19:53:03,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:03" (1/1) ... [2018-09-23 19:53:03,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:03" (1/1) ... [2018-09-23 19:53:03,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:03" (1/1) ... [2018-09-23 19:53:03,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:03" (1/1) ... [2018-09-23 19:53:03,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:53:03,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:53:03,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:53:03,103 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:53:03,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:53:03,183 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-23 19:53:03,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-23 19:53:03,184 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-23 19:53:03,366 INFO L351 CfgBuilder]: Using library mode [2018-09-23 19:53:03,367 INFO L202 PluginConnector]: Adding new model GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:53:03 BoogieIcfgContainer [2018-09-23 19:53:03,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:53:03,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:53:03,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:53:03,372 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:53:03,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:03" (1/2) ... [2018-09-23 19:53:03,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44795130 and model type GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:53:03, skipping insertion in model container [2018-09-23 19:53:03,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:53:03" (2/2) ... [2018-09-23 19:53:03,376 INFO L112 eAbstractionObserver]: Analyzing ICFG GeometricalCake.bpl [2018-09-23 19:53:03,386 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:53:03,398 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:53:03,456 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:53:03,457 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:53:03,457 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:53:03,457 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:53:03,458 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:53:03,458 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:53:03,458 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:53:03,458 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:53:03,458 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:53:03,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-23 19:53:03,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-23 19:53:03,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:03,488 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-23 19:53:03,491 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:03,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:03,500 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-23 19:53:03,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:03,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:03,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:03,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:03,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:03,648 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:53:03,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-23 19:53:03,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:53:03,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:53:03,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:53:03,668 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-23 19:53:03,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:03,712 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 19:53:03,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:53:03,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-23 19:53:03,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:03,724 INFO L225 Difference]: With dead ends: 9 [2018-09-23 19:53:03,724 INFO L226 Difference]: Without dead ends: 4 [2018-09-23 19:53:03,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:53:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-23 19:53:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-23 19:53:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-23 19:53:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-23 19:53:03,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-23 19:53:03,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:03,767 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-23 19:53:03,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:53:03,767 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-23 19:53:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 19:53:03,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:03,768 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 19:53:03,768 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:03,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:03,769 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-23 19:53:03,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:03,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:03,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:03,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:03,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:03,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:03,927 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) [2018-09-23 19:53:03,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:03,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:04,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:04,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2018-09-23 19:53:04,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:53:04,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:53:04,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:53:04,109 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 5 states. [2018-09-23 19:53:04,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:04,226 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-23 19:53:04,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:53:04,227 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 3 [2018-09-23 19:53:04,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:04,228 INFO L225 Difference]: With dead ends: 6 [2018-09-23 19:53:04,228 INFO L226 Difference]: Without dead ends: 5 [2018-09-23 19:53:04,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:53:04,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-23 19:53:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-23 19:53:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-23 19:53:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-23 19:53:04,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-23 19:53:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:04,233 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-23 19:53:04,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:53:04,235 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-23 19:53:04,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 19:53:04,235 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:04,236 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-23 19:53:04,236 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:04,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:04,237 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-23 19:53:04,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:04,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:04,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:04,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:04,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:04,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:04,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:04,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:04,450 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:04,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:04,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:04,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:04,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2018-09-23 19:53:04,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:53:04,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:53:04,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:53:04,600 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 7 states. [2018-09-23 19:53:04,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:04,644 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-23 19:53:04,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:53:04,644 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 4 [2018-09-23 19:53:04,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:04,645 INFO L225 Difference]: With dead ends: 7 [2018-09-23 19:53:04,645 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 19:53:04,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:53:04,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 19:53:04,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 19:53:04,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 19:53:04,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 19:53:04,649 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-23 19:53:04,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:04,649 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 19:53:04,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:53:04,649 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 19:53:04,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:53:04,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:04,650 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-23 19:53:04,650 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:04,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:04,651 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-23 19:53:04,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:04,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:04,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:04,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:04,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:04,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:04,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:04,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:04,887 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 19:53:04,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:04,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:05,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:05,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-09-23 19:53:05,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:53:05,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:53:05,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:53:05,158 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 9 states. [2018-09-23 19:53:05,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:05,202 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-23 19:53:05,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:53:05,203 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2018-09-23 19:53:05,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:05,204 INFO L225 Difference]: With dead ends: 8 [2018-09-23 19:53:05,204 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 19:53:05,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:53:05,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 19:53:05,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 19:53:05,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 19:53:05,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 19:53:05,209 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-23 19:53:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:05,210 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 19:53:05,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:53:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 19:53:05,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:53:05,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:05,211 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-23 19:53:05,211 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:05,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:05,211 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-23 19:53:05,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:05,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:05,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:05,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:05,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:05,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:05,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:05,326 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:05,347 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:05,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:05,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:05,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:05,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-09-23 19:53:05,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:05,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:05,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:05,609 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 11 states. [2018-09-23 19:53:05,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:05,718 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 19:53:05,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:53:05,718 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2018-09-23 19:53:05,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:05,719 INFO L225 Difference]: With dead ends: 9 [2018-09-23 19:53:05,719 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 19:53:05,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:05,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 19:53:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 19:53:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 19:53:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 19:53:05,723 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-23 19:53:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:05,724 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 19:53:05,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 19:53:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:53:05,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:05,724 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-23 19:53:05,725 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:05,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:05,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-23 19:53:05,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:05,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:05,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:05,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:05,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:05,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:05,906 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:05,924 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:05,956 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 19:53:05,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:05,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:06,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:06,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-23 19:53:06,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:53:06,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:53:06,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:53:06,450 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 13 states. [2018-09-23 19:53:06,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:06,542 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-23 19:53:06,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:53:06,543 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2018-09-23 19:53:06,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:06,544 INFO L225 Difference]: With dead ends: 10 [2018-09-23 19:53:06,544 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 19:53:06,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:53:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 19:53:06,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 19:53:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:53:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 19:53:06,549 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-23 19:53:06,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:06,550 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 19:53:06,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:53:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 19:53:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:53:06,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:06,550 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-23 19:53:06,551 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:06,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:06,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-23 19:53:06,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:06,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:06,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:06,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:06,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:06,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:06,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:06,693 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:06,701 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 19:53:06,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:06,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:07,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:07,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-23 19:53:07,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:53:07,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:53:07,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:53:07,211 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 15 states. [2018-09-23 19:53:07,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:07,348 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 19:53:07,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:53:07,349 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 8 [2018-09-23 19:53:07,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:07,350 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:53:07,350 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 19:53:07,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:53:07,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 19:53:07,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 19:53:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 19:53:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 19:53:07,355 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-23 19:53:07,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:07,355 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 19:53:07,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:53:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 19:53:07,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:53:07,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:07,356 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-23 19:53:07,356 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:07,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:07,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-23 19:53:07,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:07,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:07,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:07,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:07,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:07,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:07,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:07,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:07,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:08,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:08,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-09-23 19:53:08,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:53:08,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:53:08,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:53:08,056 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 17 states. [2018-09-23 19:53:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:08,175 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-23 19:53:08,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:53:08,175 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 9 [2018-09-23 19:53:08,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:08,176 INFO L225 Difference]: With dead ends: 12 [2018-09-23 19:53:08,176 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 19:53:08,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:53:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 19:53:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 19:53:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:53:08,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 19:53:08,181 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-23 19:53:08,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:08,181 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 19:53:08,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:53:08,181 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 19:53:08,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:53:08,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:08,182 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-23 19:53:08,182 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:08,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:08,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-23 19:53:08,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:08,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:08,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:08,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:08,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:08,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:08,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:08,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:08,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:08,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:08,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:08,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:08,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-09-23 19:53:08,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:53:08,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:53:08,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:53:08,828 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 19 states. [2018-09-23 19:53:08,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:08,961 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 19:53:08,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:08,962 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 10 [2018-09-23 19:53:08,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:08,963 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:53:08,963 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 19:53:08,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:53:08,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 19:53:08,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 19:53:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 19:53:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 19:53:08,969 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-23 19:53:08,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:08,969 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 19:53:08,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:53:08,969 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 19:53:08,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:53:08,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:08,970 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-23 19:53:08,970 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:08,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:08,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-23 19:53:08,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:08,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:08,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:08,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:08,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:09,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:09,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:09,250 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:09,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:53:09,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:09,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:09,620 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:09,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:09,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-23 19:53:09,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:53:09,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:53:09,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:53:09,651 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 21 states. [2018-09-23 19:53:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:09,841 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-23 19:53:09,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:53:09,841 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 11 [2018-09-23 19:53:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:09,842 INFO L225 Difference]: With dead ends: 14 [2018-09-23 19:53:09,842 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 19:53:09,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:53:09,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 19:53:09,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 19:53:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 19:53:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 19:53:09,846 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-23 19:53:09,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:09,846 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 19:53:09,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:53:09,846 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 19:53:09,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:53:09,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:09,847 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-23 19:53:09,847 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:09,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:09,848 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-23 19:53:09,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:09,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:09,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:09,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:09,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:10,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:10,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:10,110 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:10,122 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:10,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:10,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:10,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:10,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-09-23 19:53:10,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:53:10,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:53:10,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:53:10,786 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 23 states. [2018-09-23 19:53:11,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:11,005 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 19:53:11,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:53:11,005 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 12 [2018-09-23 19:53:11,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:11,006 INFO L225 Difference]: With dead ends: 15 [2018-09-23 19:53:11,006 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 19:53:11,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:53:11,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 19:53:11,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 19:53:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:53:11,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-23 19:53:11,011 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-23 19:53:11,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:11,012 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-23 19:53:11,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:53:11,012 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-23 19:53:11,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:53:11,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:11,012 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-23 19:53:11,012 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:11,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:11,013 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-23 19:53:11,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:11,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:11,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:11,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:11,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:11,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:11,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:11,568 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:11,581 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:53:11,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:11,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:12,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:12,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-09-23 19:53:12,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:53:12,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:53:12,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:53:12,161 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 25 states. [2018-09-23 19:53:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:12,596 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-23 19:53:12,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:53:12,597 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 13 [2018-09-23 19:53:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:12,598 INFO L225 Difference]: With dead ends: 16 [2018-09-23 19:53:12,598 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:53:12,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:53:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:53:12,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 19:53:12,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 19:53:12,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 19:53:12,604 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-23 19:53:12,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:12,605 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 19:53:12,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:53:12,605 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 19:53:12,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:53:12,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:12,606 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-23 19:53:12,606 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:12,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:12,607 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-23 19:53:12,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:12,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:12,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:12,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:12,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:12,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:12,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:12,967 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:12,988 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:53:12,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:12,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:13,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:13,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-09-23 19:53:13,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:53:13,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:53:13,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:53:13,537 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 27 states. [2018-09-23 19:53:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:14,108 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 19:53:14,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:53:14,108 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 14 [2018-09-23 19:53:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:14,109 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:53:14,109 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 19:53:14,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:53:14,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 19:53:14,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 19:53:14,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:53:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-23 19:53:14,115 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-23 19:53:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:14,115 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-23 19:53:14,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:53:14,116 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-23 19:53:14,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:53:14,116 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:14,116 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-23 19:53:14,116 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:14,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:14,117 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-23 19:53:14,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:14,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:14,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:14,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:14,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:14,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:14,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:14,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:14,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:15,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:15,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-09-23 19:53:15,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:53:15,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:53:15,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:53:15,291 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 29 states. [2018-09-23 19:53:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:15,681 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-23 19:53:15,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:53:15,681 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 15 [2018-09-23 19:53:15,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:15,682 INFO L225 Difference]: With dead ends: 18 [2018-09-23 19:53:15,682 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 19:53:15,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:53:15,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 19:53:15,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 19:53:15,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 19:53:15,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 19:53:15,688 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-23 19:53:15,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:15,688 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 19:53:15,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:53:15,688 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 19:53:15,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:53:15,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:15,689 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-23 19:53:15,689 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:15,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:15,689 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-23 19:53:15,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:15,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:15,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:15,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:15,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:16,273 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:16,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:16,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:16,282 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:16,296 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:16,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:16,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:17,200 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:17,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-09-23 19:53:17,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:53:17,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:53:17,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:53:17,202 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 31 states. [2018-09-23 19:53:17,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:17,551 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 19:53:17,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:53:17,552 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 16 [2018-09-23 19:53:17,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:17,553 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:53:17,553 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 19:53:17,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:53:17,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 19:53:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 19:53:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:53:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-23 19:53:17,558 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-23 19:53:17,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:17,559 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-23 19:53:17,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:53:17,559 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-23 19:53:17,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:53:17,560 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:17,560 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-23 19:53:17,560 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:17,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:17,561 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-23 19:53:17,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:17,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:17,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:17,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:17,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:18,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:18,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:18,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:18,029 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:53:18,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:18,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:19,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:19,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-09-23 19:53:19,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:53:19,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:53:19,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:53:19,024 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 33 states. [2018-09-23 19:53:19,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:19,548 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-23 19:53:19,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:53:19,548 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 17 [2018-09-23 19:53:19,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:19,549 INFO L225 Difference]: With dead ends: 20 [2018-09-23 19:53:19,549 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:53:19,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:53:19,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:53:19,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 19:53:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:53:19,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 19:53:19,555 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-23 19:53:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:19,556 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 19:53:19,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:53:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 19:53:19,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:53:19,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:19,557 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-23 19:53:19,557 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:19,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:19,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-23 19:53:19,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:19,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:19,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:19,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:19,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:20,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:20,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:20,152 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:20,179 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:20,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:20,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:21,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:21,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-09-23 19:53:21,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:53:21,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:53:21,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:53:21,251 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 35 states. [2018-09-23 19:53:21,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:21,900 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 19:53:21,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:53:21,900 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 18 [2018-09-23 19:53:21,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:21,901 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:53:21,901 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 19:53:21,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:53:21,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 19:53:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 19:53:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:53:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-23 19:53:21,907 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-23 19:53:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:21,907 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-23 19:53:21,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:53:21,907 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-23 19:53:21,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:21,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:21,908 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-23 19:53:21,908 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:21,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:21,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-23 19:53:21,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:21,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:21,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:21,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:21,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:22,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:22,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:22,407 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:22,470 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 19:53:22,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:22,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:23,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:23,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-09-23 19:53:23,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:53:23,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:53:23,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:53:23,353 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 37 states. [2018-09-23 19:53:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:23,968 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-23 19:53:23,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:53:23,969 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 19 [2018-09-23 19:53:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:23,970 INFO L225 Difference]: With dead ends: 22 [2018-09-23 19:53:23,970 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:53:23,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:53:23,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:53:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 19:53:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 19:53:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 19:53:23,975 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-23 19:53:23,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:23,975 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 19:53:23,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:53:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 19:53:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:53:23,976 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:23,976 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-23 19:53:23,976 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:23,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:23,977 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-23 19:53:23,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:23,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:23,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:23,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:23,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:24,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:24,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:24,526 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:24,553 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 19:53:24,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:24,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:25,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:25,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-09-23 19:53:25,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:53:25,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:53:25,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:53:25,713 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 39 states. [2018-09-23 19:53:26,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:26,455 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 19:53:26,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:53:26,456 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 20 [2018-09-23 19:53:26,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:26,456 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:53:26,457 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 19:53:26,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:53:26,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 19:53:26,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 19:53:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:53:26,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-23 19:53:26,462 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-23 19:53:26,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:26,463 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-23 19:53:26,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:53:26,463 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-23 19:53:26,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:53:26,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:26,464 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-23 19:53:26,464 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:26,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:26,464 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-23 19:53:26,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:26,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:26,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:26,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:26,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:27,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:27,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:27,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:27,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:28,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:28,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2018-09-23 19:53:28,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:53:28,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:53:28,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:53:28,587 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 41 states. [2018-09-23 19:53:29,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:29,509 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-23 19:53:29,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:53:29,509 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 21 [2018-09-23 19:53:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:29,510 INFO L225 Difference]: With dead ends: 24 [2018-09-23 19:53:29,510 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:53:29,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:53:29,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:53:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 19:53:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:53:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 19:53:29,523 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-23 19:53:29,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:29,523 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 19:53:29,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:53:29,523 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 19:53:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:53:29,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:29,524 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-23 19:53:29,524 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:29,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:29,525 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-23 19:53:29,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:29,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:29,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:29,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:29,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:30,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:30,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:30,250 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:30,270 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:30,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:30,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:31,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:31,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-09-23 19:53:31,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:53:31,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:53:31,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1493, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:53:31,982 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 43 states. [2018-09-23 19:53:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:32,856 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 19:53:32,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:53:32,859 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 22 [2018-09-23 19:53:32,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:32,859 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:53:32,859 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 19:53:32,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=313, Invalid=1493, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:53:32,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 19:53:32,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 19:53:32,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:53:32,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-23 19:53:32,864 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-23 19:53:32,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:32,864 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-23 19:53:32,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:53:32,864 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-23 19:53:32,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 19:53:32,865 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:32,865 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-23 19:53:32,865 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:32,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:32,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-23 19:53:32,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:32,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:32,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:32,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:32,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:33,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:33,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:33,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:33,724 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 19:53:33,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:33,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:35,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:35,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2018-09-23 19:53:35,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:53:35,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:53:35,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:53:35,710 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 45 states. [2018-09-23 19:53:36,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:36,613 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-23 19:53:36,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:53:36,615 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 23 [2018-09-23 19:53:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:36,615 INFO L225 Difference]: With dead ends: 26 [2018-09-23 19:53:36,615 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:53:36,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:53:36,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:53:36,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 19:53:36,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:53:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 19:53:36,619 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-23 19:53:36,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:36,619 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 19:53:36,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:53:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 19:53:36,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:53:36,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:36,620 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-23 19:53:36,621 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:36,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:36,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-23 19:53:36,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:36,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:36,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:36,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:36,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:37,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:37,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:37,406 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:37,429 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:37,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:37,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:39,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:39,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-09-23 19:53:39,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:53:39,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:53:39,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:53:39,069 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 47 states. [2018-09-23 19:53:40,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:40,178 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 19:53:40,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:53:40,178 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 24 [2018-09-23 19:53:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:40,179 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:53:40,179 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 19:53:40,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:53:40,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 19:53:40,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 19:53:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:53:40,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-23 19:53:40,186 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-23 19:53:40,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:40,186 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-23 19:53:40,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:53:40,186 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-23 19:53:40,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 19:53:40,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:40,187 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-23 19:53:40,187 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:40,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:40,187 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-23 19:53:40,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:40,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:40,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:40,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:40,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:41,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:41,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:41,156 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:41,190 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 19:53:41,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:41,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:43,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:43,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2018-09-23 19:53:43,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:53:43,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:53:43,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1958, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:53:43,144 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 49 states. [2018-09-23 19:53:44,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:44,808 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-23 19:53:44,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:53:44,808 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 25 [2018-09-23 19:53:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:44,809 INFO L225 Difference]: With dead ends: 28 [2018-09-23 19:53:44,809 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:53:44,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=394, Invalid=1958, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:53:44,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:53:44,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 19:53:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:53:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 19:53:44,815 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-23 19:53:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:44,815 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 19:53:44,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:53:44,816 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 19:53:44,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:53:44,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:44,816 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-23 19:53:44,817 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:44,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:44,817 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-23 19:53:44,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:44,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:44,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:44,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:44,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:45,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:45,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:45,992 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:46,030 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 19:53:46,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:46,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:48,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:48,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-09-23 19:53:48,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:53:48,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:53:48,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2127, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:53:48,127 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 51 states. [2018-09-23 19:53:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:49,366 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 19:53:49,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:53:49,366 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 26 [2018-09-23 19:53:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:49,367 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:53:49,367 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 19:53:49,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=423, Invalid=2127, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:53:49,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 19:53:49,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 19:53:49,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:53:49,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-23 19:53:49,374 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-23 19:53:49,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:49,374 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-23 19:53:49,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:53:49,375 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-23 19:53:49,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 19:53:49,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:49,375 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-23 19:53:49,376 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:49,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:49,376 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-23 19:53:49,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:49,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:49,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:49,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:49,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:51,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:51,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:51,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:51,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:53,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:53,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2018-09-23 19:53:53,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:53:53,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:53:53,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=2303, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:53:53,637 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 53 states. [2018-09-23 19:53:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:54,948 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-23 19:53:54,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:53:54,948 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 27 [2018-09-23 19:53:54,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:54,949 INFO L225 Difference]: With dead ends: 30 [2018-09-23 19:53:54,949 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:53:54,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=453, Invalid=2303, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:53:54,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:53:54,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 19:53:54,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:53:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 19:53:54,957 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-23 19:53:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:54,957 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 19:53:54,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:53:54,958 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 19:53:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:53:54,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:54,958 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-23 19:53:54,959 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:54,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:54,959 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-23 19:53:54,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:54,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:54,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:54,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:54,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:56,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:56,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:56,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:56,168 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:56,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:56,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:59,200 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:59,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-09-23 19:53:59,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:53:59,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:53:59,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=2486, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:53:59,202 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 55 states. [2018-09-23 19:54:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:01,176 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 19:54:01,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:54:01,177 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 28 [2018-09-23 19:54:01,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:01,177 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:54:01,177 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 19:54:01,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=484, Invalid=2486, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:54:01,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 19:54:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 19:54:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:54:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-23 19:54:01,183 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-23 19:54:01,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:01,183 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-23 19:54:01,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:54:01,183 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-23 19:54:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:54:01,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:01,184 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-23 19:54:01,184 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:01,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:01,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-23 19:54:01,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:01,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:01,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:01,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:01,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:03,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:03,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:03,128 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:54:03,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 19:54:03,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:03,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:06,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:06,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2018-09-23 19:54:06,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:54:06,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:54:06,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=2676, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:54:06,029 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 57 states. [2018-09-23 19:54:08,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:08,346 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-23 19:54:08,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:54:08,346 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 29 [2018-09-23 19:54:08,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:08,347 INFO L225 Difference]: With dead ends: 32 [2018-09-23 19:54:08,347 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:54:08,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=516, Invalid=2676, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:54:08,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:54:08,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 19:54:08,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:54:08,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 19:54:08,354 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-23 19:54:08,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:08,354 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 19:54:08,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:54:08,354 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 19:54:08,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:54:08,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:08,355 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-23 19:54:08,355 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:08,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:08,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-23 19:54:08,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:08,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:08,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:08,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:08,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:09,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:09,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:09,731 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:54:09,766 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:54:09,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:09,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:12,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:12,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-09-23 19:54:12,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:54:12,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:54:12,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=2873, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:54:12,760 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 59 states. [2018-09-23 19:54:14,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:14,899 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 19:54:14,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:54:14,899 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 30 [2018-09-23 19:54:14,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:14,900 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:54:14,900 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 19:54:14,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=549, Invalid=2873, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:54:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 19:54:14,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 19:54:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:54:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-23 19:54:14,907 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-23 19:54:14,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:14,907 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-23 19:54:14,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:54:14,907 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-23 19:54:14,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 19:54:14,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:14,908 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-23 19:54:14,908 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:14,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:14,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-23 19:54:14,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:14,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:14,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:14,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:14,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:16,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:16,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:16,464 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:54:16,512 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 19:54:16,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:16,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:19,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:19,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 59 [2018-09-23 19:54:19,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 19:54:19,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 19:54:19,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=3077, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:54:19,805 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 61 states. [2018-09-23 19:54:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:21,622 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-23 19:54:21,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:54:21,622 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 31 [2018-09-23 19:54:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:21,623 INFO L225 Difference]: With dead ends: 34 [2018-09-23 19:54:21,623 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:54:21,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=583, Invalid=3077, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:54:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:54:21,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 19:54:21,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 19:54:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 19:54:21,629 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-23 19:54:21,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:21,630 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 19:54:21,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 19:54:21,630 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 19:54:21,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:54:21,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:21,630 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-23 19:54:21,631 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:21,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:21,631 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-23 19:54:21,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:21,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:21,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:21,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:21,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:23,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:23,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:23,423 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:54:23,483 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 19:54:23,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:23,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:26,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:26,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-09-23 19:54:26,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 19:54:26,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 19:54:26,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:54:26,938 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 63 states. [2018-09-23 19:54:29,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:29,297 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 19:54:29,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:54:29,297 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 32 [2018-09-23 19:54:29,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:29,298 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:54:29,298 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 19:54:29,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:54:29,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 19:54:29,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 19:54:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:54:29,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-23 19:54:29,303 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-23 19:54:29,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:29,303 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-23 19:54:29,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 19:54:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-23 19:54:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:54:29,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:29,304 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-23 19:54:29,304 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:29,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:29,304 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-23 19:54:29,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:29,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:29,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:29,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:29,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:31,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:31,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:31,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:31,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:35,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:35,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-09-23 19:54:35,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:54:35,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:54:35,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=3506, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:54:35,390 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 65 states. [2018-09-23 19:54:38,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:38,264 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-23 19:54:38,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:54:38,265 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 33 [2018-09-23 19:54:38,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:38,266 INFO L225 Difference]: With dead ends: 36 [2018-09-23 19:54:38,266 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:54:38,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=654, Invalid=3506, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:54:38,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:54:38,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 19:54:38,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:54:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 19:54:38,271 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-23 19:54:38,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:38,272 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 19:54:38,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:54:38,272 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 19:54:38,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:54:38,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:38,272 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-23 19:54:38,272 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:38,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:38,273 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-23 19:54:38,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:38,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:38,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:38,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:38,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:40,269 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:40,269 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:40,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:54:40,322 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:54:40,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:40,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:44,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:44,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-09-23 19:54:44,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 19:54:44,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 19:54:44,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=3731, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:54:44,490 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 67 states. [2018-09-23 19:54:47,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:47,969 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 19:54:47,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:54:47,970 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 34 [2018-09-23 19:54:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:47,970 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:54:47,971 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 19:54:47,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=691, Invalid=3731, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:54:47,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 19:54:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 19:54:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 19:54:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-23 19:54:47,977 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-23 19:54:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:47,977 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-23 19:54:47,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 19:54:47,977 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-23 19:54:47,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 19:54:47,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:47,978 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-23 19:54:47,978 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:47,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:47,979 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-23 19:54:47,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:47,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:47,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:47,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:47,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:50,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:50,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:50,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:54:50,192 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 19:54:50,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:50,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:54,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:54,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 67 [2018-09-23 19:54:54,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 19:54:54,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 19:54:54,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=3963, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:54:54,676 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 69 states. [2018-09-23 19:54:57,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:57,691 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-23 19:54:57,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:54:57,692 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 35 [2018-09-23 19:54:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:57,692 INFO L225 Difference]: With dead ends: 38 [2018-09-23 19:54:57,692 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:54:57,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=729, Invalid=3963, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:54:57,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:54:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 19:54:57,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:54:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 19:54:57,699 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-23 19:54:57,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:57,699 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 19:54:57,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 19:54:57,699 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 19:54:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 19:54:57,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:57,700 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-23 19:54:57,700 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:57,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:57,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-23 19:54:57,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:57,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:57,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:57,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:57,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:00,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:00,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:00,028 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:55:00,078 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:55:00,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:00,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:04,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:04,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-09-23 19:55:04,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:55:04,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:55:04,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=4202, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:55:04,943 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 71 states. [2018-09-23 19:55:08,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:08,880 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 19:55:08,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:55:08,881 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 36 [2018-09-23 19:55:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:08,881 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:55:08,881 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 19:55:08,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=768, Invalid=4202, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:55:08,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 19:55:08,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 19:55:08,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 19:55:08,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-23 19:55:08,886 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-23 19:55:08,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:08,886 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-23 19:55:08,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:55:08,886 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-23 19:55:08,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 19:55:08,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:08,886 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-23 19:55:08,886 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:08,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:08,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-23 19:55:08,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:08,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:08,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:08,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:08,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:11,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:11,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:11,379 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:55:11,453 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 19:55:11,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:11,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:16,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:16,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2018-09-23 19:55:16,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 19:55:16,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 19:55:16,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=808, Invalid=4448, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:55:16,828 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 73 states. [2018-09-23 19:55:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:20,523 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-23 19:55:20,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:55:20,524 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 37 [2018-09-23 19:55:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:20,525 INFO L225 Difference]: With dead ends: 40 [2018-09-23 19:55:20,525 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:55:20,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=808, Invalid=4448, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:55:20,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:55:20,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 19:55:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:55:20,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 19:55:20,530 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-23 19:55:20,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:20,531 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 19:55:20,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 19:55:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 19:55:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:55:20,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:20,531 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-23 19:55:20,531 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:20,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:20,532 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-23 19:55:20,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:20,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:20,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:20,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:20,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:23,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:23,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:23,313 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:55:23,379 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:55:23,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:23,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:29,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:29,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-09-23 19:55:29,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 19:55:29,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 19:55:29,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=849, Invalid=4701, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:55:29,169 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 75 states. [2018-09-23 19:55:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:33,864 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 19:55:33,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:55:33,865 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 38 [2018-09-23 19:55:33,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:33,866 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:55:33,866 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 19:55:33,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=849, Invalid=4701, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:55:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 19:55:33,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 19:55:33,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 19:55:33,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-23 19:55:33,871 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-23 19:55:33,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:33,871 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-23 19:55:33,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 19:55:33,871 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-23 19:55:33,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 19:55:33,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:33,872 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-23 19:55:33,872 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:33,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:33,872 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-23 19:55:33,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:33,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:33,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:33,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:33,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:36,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:36,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:36,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:55:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:36,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:43,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:43,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 75 [2018-09-23 19:55:43,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 19:55:43,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 19:55:43,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=4961, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:55:43,038 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 77 states. [2018-09-23 19:55:47,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:47,727 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-23 19:55:47,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:55:47,727 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 39 [2018-09-23 19:55:47,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:47,728 INFO L225 Difference]: With dead ends: 42 [2018-09-23 19:55:47,728 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:55:47,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=891, Invalid=4961, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:55:47,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:55:47,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 19:55:47,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 19:55:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 19:55:47,733 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-23 19:55:47,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:47,733 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 19:55:47,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 19:55:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 19:55:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 19:55:47,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:47,733 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-23 19:55:47,734 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:55:47,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:47,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-23 19:55:47,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:47,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:47,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:47,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:55:47,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:50,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:55:50,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:55:50,903 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:55:50,967 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:55:50,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:50,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:57,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:55:57,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 77 [2018-09-23 19:55:57,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 19:55:57,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 19:55:57,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=934, Invalid=5228, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:55:57,740 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 79 states. [2018-09-23 19:56:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:02,384 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 19:56:02,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:56:02,384 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 40 [2018-09-23 19:56:02,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:02,385 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:56:02,385 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 19:56:02,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=934, Invalid=5228, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:56:02,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 19:56:02,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 19:56:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 19:56:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-23 19:56:02,390 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-23 19:56:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:02,390 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-23 19:56:02,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 19:56:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-23 19:56:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 19:56:02,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:02,390 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-23 19:56:02,391 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:02,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:02,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-23 19:56:02,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:02,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:02,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:02,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:02,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:05,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:05,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:05,730 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:56:05,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 19:56:05,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:05,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:13,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:13,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2018-09-23 19:56:13,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 19:56:13,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 19:56:13,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=978, Invalid=5502, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:56:13,076 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 81 states. [2018-09-23 19:56:17,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:17,685 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-23 19:56:17,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:56:17,685 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 41 [2018-09-23 19:56:17,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:17,686 INFO L225 Difference]: With dead ends: 44 [2018-09-23 19:56:17,686 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:56:17,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=978, Invalid=5502, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:56:17,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:56:17,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 19:56:17,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:56:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 19:56:17,692 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-23 19:56:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:17,692 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 19:56:17,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 19:56:17,692 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 19:56:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:56:17,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:17,693 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-23 19:56:17,693 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:17,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:17,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-23 19:56:17,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:17,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:17,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:17,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:17,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:21,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:21,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:21,337 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:56:21,406 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:56:21,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:21,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:29,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:29,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2018-09-23 19:56:29,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 19:56:29,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 19:56:29,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=5783, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:56:29,180 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 83 states. [2018-09-23 19:56:33,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:33,664 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 19:56:33,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:56:33,664 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 42 [2018-09-23 19:56:33,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:33,665 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:56:33,665 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 19:56:33,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1023, Invalid=5783, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:56:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 19:56:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 19:56:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 19:56:33,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-23 19:56:33,670 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-23 19:56:33,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:33,670 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-23 19:56:33,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 19:56:33,671 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-23 19:56:33,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 19:56:33,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:33,671 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-23 19:56:33,671 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:33,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:33,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-23 19:56:33,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:33,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:33,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:33,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:33,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:37,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:37,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:37,661 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:56:37,779 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 19:56:37,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:37,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:46,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:56:46,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 83 [2018-09-23 19:56:46,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-23 19:56:46,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-23 19:56:46,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1069, Invalid=6071, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:56:46,160 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 85 states. [2018-09-23 19:56:51,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:51,214 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-23 19:56:51,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:56:51,215 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 43 [2018-09-23 19:56:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:51,216 INFO L225 Difference]: With dead ends: 46 [2018-09-23 19:56:51,216 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:56:51,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1069, Invalid=6071, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:56:51,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:56:51,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 19:56:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 19:56:51,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 19:56:51,222 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-23 19:56:51,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:51,222 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 19:56:51,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-23 19:56:51,222 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 19:56:51,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:56:51,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:51,223 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-23 19:56:51,223 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:56:51,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:51,223 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-23 19:56:51,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:51,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:51,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:51,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:51,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:55,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:56:55,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:56:55,471 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:56:55,603 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 19:56:55,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:55,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:57:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:57:04,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:57:04,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 85 [2018-09-23 19:57:04,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-23 19:57:04,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-23 19:57:04,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1116, Invalid=6366, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:57:04,637 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 87 states. [2018-09-23 19:57:09,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:57:09,928 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 19:57:09,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:57:09,928 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 44 [2018-09-23 19:57:09,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:57:09,929 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:57:09,929 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 19:57:09,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=1116, Invalid=6366, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:57:09,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 19:57:09,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 19:57:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 19:57:09,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-23 19:57:09,935 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-23 19:57:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:57:09,935 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-23 19:57:09,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-23 19:57:09,935 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-23 19:57:09,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 19:57:09,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:57:09,936 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-23 19:57:09,936 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:57:09,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:57:09,936 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-23 19:57:09,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:57:09,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:57:09,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:57:09,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:57:09,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:57:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:57:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:57:14,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:57:14,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:57:14,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:57:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:57:14,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:57:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:57:24,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:57:24,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 87 [2018-09-23 19:57:24,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 19:57:24,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 19:57:24,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=6668, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:57:24,332 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 89 states. [2018-09-23 19:57:30,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:57:30,202 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-23 19:57:30,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:57:30,202 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 45 [2018-09-23 19:57:30,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:57:30,203 INFO L225 Difference]: With dead ends: 48 [2018-09-23 19:57:30,203 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:57:30,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=1164, Invalid=6668, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:57:30,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:57:30,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 19:57:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:57:30,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 19:57:30,209 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-23 19:57:30,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:57:30,209 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 19:57:30,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 19:57:30,209 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 19:57:30,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:57:30,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:57:30,210 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-23 19:57:30,210 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:57:30,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:57:30,210 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-23 19:57:30,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:57:30,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:57:30,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:57:30,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:57:30,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:57:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 19:57:31,470 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:57:31,475 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:57:31,475 INFO L202 PluginConnector]: Adding new model GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:57:31 BoogieIcfgContainer [2018-09-23 19:57:31,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:57:31,476 INFO L168 Benchmark]: Toolchain (without parser) took 268449.09 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 29.4 MB). Free memory was 1.5 GB in the beginning and 975.1 MB in the end (delta: 505.3 MB). Peak memory consumption was 534.6 MB. Max. memory is 7.1 GB. [2018-09-23 19:57:31,478 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:57:31,478 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.02 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:57:31,479 INFO L168 Benchmark]: Boogie Preprocessor took 25.96 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:57:31,479 INFO L168 Benchmark]: RCFGBuilder took 264.65 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:57:31,479 INFO L168 Benchmark]: TraceAbstraction took 268106.65 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 29.4 MB). Free memory was 1.5 GB in the beginning and 975.1 MB in the end (delta: 484.1 MB). Peak memory consumption was 513.5 MB. Max. memory is 7.1 GB. [2018-09-23 19:57:31,482 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.02 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.96 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 264.65 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 268106.65 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 29.4 MB). Free memory was 1.5 GB in the beginning and 975.1 MB in the end (delta: 484.1 MB). Peak memory consumption was 513.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 21). Cancelled while BasicCegarLoop was analyzing trace of length 47 with TraceHistMax 44, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 45 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 268.0s OverallTime, 45 OverallIterations, 44 TraceHistogramMax, 80.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 89 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 35138 SolverSat, 946 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 74.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1979 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1936 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13244 ImplicationChecksByTransitivity, 175.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 44 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 180.9s InterpolantComputationTime, 2066 NumberOfCodeBlocks, 2066 NumberOfCodeBlocksAsserted, 339 NumberOfCheckSat, 1979 ConstructedInterpolants, 0 QuantifiedInterpolants, 569581 SizeOfPredicates, 43 NumberOfNonLiveVariables, 4085 ConjunctsInSsa, 2021 ConjunctsInUnsatCore, 87 InterpolantComputations, 1 PerfectInterpolantSequences, 0/28380 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/GeometricalCake.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-57-31-492.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/GeometricalCake.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-57-31-492.csv Completed graceful shutdown