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_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/GeometricalCake.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:52:35,989 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:52:35,991 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:52:36,009 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:52:36,009 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:52:36,010 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:52:36,013 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:52:36,015 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:52:36,018 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:52:36,020 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:52:36,023 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 20:52:36,023 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 20:52:36,024 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 20:52:36,025 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 20:52:36,027 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 20:52:36,030 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 20:52:36,031 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 20:52:36,041 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 20:52:36,043 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 20:52:36,048 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 20:52:36,050 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 20:52:36,052 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 20:52:36,055 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 20:52:36,071 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-30 20:52:36,098 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:52:36,098 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:52:36,099 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:52:36,099 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:52:36,100 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:52:36,100 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:52:36,101 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:52:36,101 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:52:36,102 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:52:36,102 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:52:36,102 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:52:36,102 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:52:36,102 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:52:36,103 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:52:36,103 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:52:36,103 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:52:36,103 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:52:36,104 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:52:36,105 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:52:36,105 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:52:36,105 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:52:36,105 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:52:36,105 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:52:36,106 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:52:36,106 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:52:36,106 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:52:36,106 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:52:36,107 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:52:36,107 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:52:36,107 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:52:36,107 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 20:52:36,159 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:52:36,174 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:52:36,180 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:52:36,181 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:52:36,182 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:52:36,183 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/GeometricalCake.bpl [2018-09-30 20:52:36,183 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/GeometricalCake.bpl' [2018-09-30 20:52:36,237 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:52:36,241 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:52:36,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:52:36,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:52:36,242 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:52:36,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:36" (1/1) ... [2018-09-30 20:52:36,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:36" (1/1) ... [2018-09-30 20:52:36,282 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 20:52:36,283 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 20:52:36,283 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 20:52:36,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:52:36,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:52:36,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:52:36,286 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:52:36,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:36" (1/1) ... [2018-09-30 20:52:36,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:36" (1/1) ... [2018-09-30 20:52:36,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:36" (1/1) ... [2018-09-30 20:52:36,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:36" (1/1) ... [2018-09-30 20:52:36,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:36" (1/1) ... [2018-09-30 20:52:36,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:36" (1/1) ... [2018-09-30 20:52:36,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:36" (1/1) ... [2018-09-30 20:52:36,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:52:36,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:52:36,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:52:36,311 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:52:36,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:52:36,386 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 20:52:36,387 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 20:52:36,387 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 20:52:36,523 INFO L345 CfgBuilder]: Using library mode [2018-09-30 20:52:36,523 INFO L202 PluginConnector]: Adding new model GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:52:36 BoogieIcfgContainer [2018-09-30 20:52:36,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:52:36,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:52:36,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:52:36,529 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:52:36,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:36" (1/2) ... [2018-09-30 20:52:36,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252499b8 and model type GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:52:36, skipping insertion in model container [2018-09-30 20:52:36,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:52:36" (2/2) ... [2018-09-30 20:52:36,537 INFO L112 eAbstractionObserver]: Analyzing ICFG GeometricalCake.bpl [2018-09-30 20:52:36,547 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:52:36,560 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:52:36,606 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:52:36,607 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:52:36,607 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:52:36,607 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:52:36,608 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:52:36,608 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:52:36,608 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:52:36,608 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:52:36,608 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:52:36,621 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-30 20:52:36,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-30 20:52:36,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:36,628 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-30 20:52:36,630 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:36,638 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:36,638 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-30 20:52:36,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:36,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:36,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:36,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:36,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:36,820 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:52:36,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 20:52:36,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:52:36,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:52:36,836 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:36,839 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-30 20:52:37,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:37,026 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 20:52:37,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:52:37,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-30 20:52:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:37,040 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:52:37,040 INFO L226 Difference]: Without dead ends: 4 [2018-09-30 20:52:37,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:52:37,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-30 20:52:37,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-30 20:52:37,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-30 20:52:37,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-30 20:52:37,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-30 20:52:37,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:37,080 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-30 20:52:37,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:52:37,081 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-30 20:52:37,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 20:52:37,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:37,081 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 20:52:37,082 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:37,082 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:37,082 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-30 20:52:37,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:37,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:37,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:37,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:37,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:37,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:37,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:37,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:37,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:37,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:37,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2018-09-30 20:52:37,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:52:37,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:52:37,347 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:37,348 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 5 states. [2018-09-30 20:52:37,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:37,624 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-30 20:52:37,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:52:37,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 3 [2018-09-30 20:52:37,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:37,625 INFO L225 Difference]: With dead ends: 6 [2018-09-30 20:52:37,625 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 20:52:37,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:37,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 20:52:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 20:52:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 20:52:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 20:52:37,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 20:52:37,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:37,629 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 20:52:37,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:52:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 20:52:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:52:37,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:37,630 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-30 20:52:37,630 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:37,631 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:37,631 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-30 20:52:37,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:37,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:37,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:37,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:37,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:37,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:37,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:37,755 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:37,783 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:37,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:37,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:37,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:37,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2018-09-30 20:52:37,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:52:37,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:52:37,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:37,958 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 7 states. [2018-09-30 20:52:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:38,306 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-30 20:52:38,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:52:38,307 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 4 [2018-09-30 20:52:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:38,307 INFO L225 Difference]: With dead ends: 7 [2018-09-30 20:52:38,308 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 20:52:38,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 20:52:38,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 20:52:38,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 20:52:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 20:52:38,311 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 20:52:38,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:38,312 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 20:52:38,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:52:38,312 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 20:52:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:52:38,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:38,313 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-30 20:52:38,314 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:38,314 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:38,314 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-30 20:52:38,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:38,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:38,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:38,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:38,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:38,425 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:38,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:38,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:38,451 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 20:52:38,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:38,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:38,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:38,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-09-30 20:52:38,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:52:38,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:52:38,672 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:38,672 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 9 states. [2018-09-30 20:52:38,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:38,834 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 20:52:38,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:52:38,835 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2018-09-30 20:52:38,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:38,835 INFO L225 Difference]: With dead ends: 8 [2018-09-30 20:52:38,836 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:52:38,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:38,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:52:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:52:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:52:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 20:52:38,840 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 20:52:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:38,840 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 20:52:38,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:52:38,840 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 20:52:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:52:38,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:38,841 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-30 20:52:38,841 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:38,841 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:38,842 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-30 20:52:38,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:38,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:38,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:38,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:38,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:39,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:39,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:39,246 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:39,268 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:39,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:39,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:39,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:39,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-09-30 20:52:39,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:52:39,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:52:39,561 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:39,562 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 11 states. [2018-09-30 20:52:39,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:39,836 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 20:52:39,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:52:39,837 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2018-09-30 20:52:39,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:39,838 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:52:39,838 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 20:52:39,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:52:39,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 20:52:39,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 20:52:39,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:52:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 20:52:39,843 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 20:52:39,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:39,843 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 20:52:39,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:52:39,843 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 20:52:39,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:52:39,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:39,844 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-30 20:52:39,844 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:39,844 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:39,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-30 20:52:39,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:39,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:39,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:39,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:39,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:39,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:39,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:39,987 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:39,997 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 20:52:39,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:40,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:40,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:40,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-30 20:52:40,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:52:40,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:52:40,168 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:40,169 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 13 states. [2018-09-30 20:52:40,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:40,622 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 20:52:40,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:52:40,622 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2018-09-30 20:52:40,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:40,623 INFO L225 Difference]: With dead ends: 10 [2018-09-30 20:52:40,623 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 20:52:40,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:40,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 20:52:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 20:52:40,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:52:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 20:52:40,626 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 20:52:40,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:40,628 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 20:52:40,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:52:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 20:52:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:52:40,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:40,629 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-30 20:52:40,629 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:40,629 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:40,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-30 20:52:40,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:40,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:40,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:40,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:40,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:40,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:40,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:40,994 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:41,008 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 20:52:41,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:41,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:41,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:41,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 20:52:41,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:52:41,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:52:41,284 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:41,284 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 15 states. [2018-09-30 20:52:41,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:41,737 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:52:41,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:52:41,738 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 8 [2018-09-30 20:52:41,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:41,739 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:52:41,739 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:52:41,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:52:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:52:41,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 20:52:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:52:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 20:52:41,744 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 20:52:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:41,744 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 20:52:41,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:52:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 20:52:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:52:41,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:41,745 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-30 20:52:41,746 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:41,746 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:41,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-30 20:52:41,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:41,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:41,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:41,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:41,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:41,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:41,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:41,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:41,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:42,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:42,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-09-30 20:52:42,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:52:42,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:52:42,228 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:42,228 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 17 states. [2018-09-30 20:52:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:42,720 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 20:52:42,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:52:42,720 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 9 [2018-09-30 20:52:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:42,721 INFO L225 Difference]: With dead ends: 12 [2018-09-30 20:52:42,721 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:52:42,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:52:42,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:52:42,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:52:42,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:52:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 20:52:42,725 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 20:52:42,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:42,726 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 20:52:42,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:52:42,726 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 20:52:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:52:42,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:42,726 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-30 20:52:42,727 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:42,727 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:42,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-30 20:52:42,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:42,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:42,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:42,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:42,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:43,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:43,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:43,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:43,027 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:43,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:43,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:43,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:43,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-09-30 20:52:43,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:52:43,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:52:43,394 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:43,394 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 19 states. [2018-09-30 20:52:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:43,946 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:52:43,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:52:43,947 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 10 [2018-09-30 20:52:43,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:43,948 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:52:43,949 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 20:52:43,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:52:43,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 20:52:43,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 20:52:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:52:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 20:52:43,953 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 20:52:43,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:43,954 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 20:52:43,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:52:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 20:52:43,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:52:43,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:43,955 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-30 20:52:43,955 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:43,955 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:43,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-30 20:52:43,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:43,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:43,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:43,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:43,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:44,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:44,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:44,307 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:44,332 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 20:52:44,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:44,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:44,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:44,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-30 20:52:44,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:52:44,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:52:44,683 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:44,683 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 21 states. [2018-09-30 20:52:45,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:45,313 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 20:52:45,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:52:45,314 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 11 [2018-09-30 20:52:45,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:45,315 INFO L225 Difference]: With dead ends: 14 [2018-09-30 20:52:45,315 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:52:45,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:52:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:52:45,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:52:45,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:52:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 20:52:45,319 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 20:52:45,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:45,320 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 20:52:45,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:52:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 20:52:45,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:52:45,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:45,321 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-30 20:52:45,321 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:45,321 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:45,321 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-30 20:52:45,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:45,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:45,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:45,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:45,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:45,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:45,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:45,642 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:45,664 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:45,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:45,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:46,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:46,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-09-30 20:52:46,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:52:46,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:52:46,541 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:46,541 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 23 states. [2018-09-30 20:52:47,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:47,376 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 20:52:47,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:52:47,377 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 12 [2018-09-30 20:52:47,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:47,378 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:52:47,378 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 20:52:47,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:52:47,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 20:52:47,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 20:52:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:52:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 20:52:47,383 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 20:52:47,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:47,384 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 20:52:47,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:52:47,384 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 20:52:47,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:52:47,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:47,389 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-30 20:52:47,389 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:47,390 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:47,390 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-30 20:52:47,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:47,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:47,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:47,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:47,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:47,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:47,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:47,794 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:47,823 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:52:47,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:47,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:48,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:48,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-09-30 20:52:48,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:52:48,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:52:48,202 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:48,202 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 25 states. [2018-09-30 20:52:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:49,191 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 20:52:49,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:52:49,192 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 13 [2018-09-30 20:52:49,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:49,193 INFO L225 Difference]: With dead ends: 16 [2018-09-30 20:52:49,193 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:52:49,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:52:49,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:52:49,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:52:49,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:52:49,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 20:52:49,198 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 20:52:49,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:49,198 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 20:52:49,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:52:49,199 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 20:52:49,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:52:49,199 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:49,199 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-30 20:52:49,199 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:49,200 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:49,200 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-30 20:52:49,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:49,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:49,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:49,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:49,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:49,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:49,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:49,808 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:49,876 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:52:49,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:49,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:50,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:50,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-09-30 20:52:50,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:52:50,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:52:50,415 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:50,416 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 27 states. [2018-09-30 20:52:51,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:51,457 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:52:51,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:52:51,457 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 14 [2018-09-30 20:52:51,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:51,458 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:52:51,458 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:52:51,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:52:51,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:52:51,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 20:52:51,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:52:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 20:52:51,463 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 20:52:51,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:51,464 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 20:52:51,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:52:51,464 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 20:52:51,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:52:51,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:51,465 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-30 20:52:51,465 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:51,466 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:51,466 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-30 20:52:51,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:51,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:51,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:51,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:51,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:51,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:51,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:51,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:51,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:52,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:52,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-09-30 20:52:52,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:52:52,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:52:52,716 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:52,717 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 29 states. [2018-09-30 20:52:54,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:54,092 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 20:52:54,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:52:54,092 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 15 [2018-09-30 20:52:54,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:54,093 INFO L225 Difference]: With dead ends: 18 [2018-09-30 20:52:54,093 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:52:54,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:52:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:52:54,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 20:52:54,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:52:54,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 20:52:54,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 20:52:54,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:54,099 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 20:52:54,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:52:54,099 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 20:52:54,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:52:54,100 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:54,100 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-30 20:52:54,100 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:54,100 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:54,100 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-30 20:52:54,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:54,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:54,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:54,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:54,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:54,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:54,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:54,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:54,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:54,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:54,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:55,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:55,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-09-30 20:52:55,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:52:55,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:52:55,329 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:55,329 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 31 states. [2018-09-30 20:52:57,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:57,047 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 20:52:57,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:52:57,048 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 16 [2018-09-30 20:52:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:57,049 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:52:57,049 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 20:52:57,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:52:57,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 20:52:57,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 20:52:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:52:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 20:52:57,054 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 20:52:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:57,054 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 20:52:57,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:52:57,055 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 20:52:57,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:52:57,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:57,055 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-30 20:52:57,055 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:57,056 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:57,056 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-30 20:52:57,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:57,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:57,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:57,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:57,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:57,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:57,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:57,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:57,852 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:52:57,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:57,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:58,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:58,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-09-30 20:52:58,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:52:58,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:52:58,669 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:58,669 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 33 states. [2018-09-30 20:53:00,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:00,216 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 20:53:00,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:53:00,217 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 17 [2018-09-30 20:53:00,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:00,218 INFO L225 Difference]: With dead ends: 20 [2018-09-30 20:53:00,218 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:53:00,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:53:00,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:53:00,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:53:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:53:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 20:53:00,226 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 20:53:00,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:00,226 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 20:53:00,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:53:00,227 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 20:53:00,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:53:00,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:00,227 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-30 20:53:00,227 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:00,228 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:00,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-30 20:53:00,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:00,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:00,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:00,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:00,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:00,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:00,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:00,835 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:00,849 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:00,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:00,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:01,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:01,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-09-30 20:53:01,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:53:01,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:53:01,559 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:01,560 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 35 states. [2018-09-30 20:53:03,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:03,302 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:53:03,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:53:03,303 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 18 [2018-09-30 20:53:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:03,304 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:53:03,304 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:53:03,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:53:03,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:53:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 20:53:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:53:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 20:53:03,310 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 20:53:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:03,310 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 20:53:03,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:53:03,310 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 20:53:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:53:03,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:03,311 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-30 20:53:03,311 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:03,312 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:03,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-30 20:53:03,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:03,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:03,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:03,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:03,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:04,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:04,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:04,015 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:04,038 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 20:53:04,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:04,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:05,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:05,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-09-30 20:53:05,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:53:05,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:53:05,305 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:05,305 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 37 states. [2018-09-30 20:53:07,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:07,879 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 20:53:07,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:53:07,879 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 19 [2018-09-30 20:53:07,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:07,880 INFO L225 Difference]: With dead ends: 22 [2018-09-30 20:53:07,880 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:53:07,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:53:07,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:53:07,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:53:07,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:53:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 20:53:07,887 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 20:53:07,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:07,887 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 20:53:07,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:53:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 20:53:07,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:53:07,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:07,888 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-30 20:53:07,888 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:07,888 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:07,889 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-30 20:53:07,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:07,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:07,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:07,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:07,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:08,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:08,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:08,675 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:53:08,696 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 20:53:08,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:08,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:09,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:09,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-09-30 20:53:09,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:53:09,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:53:09,795 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:09,795 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 39 states. [2018-09-30 20:53:12,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:12,652 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 20:53:12,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:53:12,653 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 20 [2018-09-30 20:53:12,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:12,653 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:53:12,653 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 20:53:12,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-09-30 20:53:12,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 20:53:12,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 20:53:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:53:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 20:53:12,659 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 20:53:12,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:12,659 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 20:53:12,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:53:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 20:53:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:53:12,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:12,660 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-30 20:53:12,660 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:12,660 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:12,661 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-30 20:53:12,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:12,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:12,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:12,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:12,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:13,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:13,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:13,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:13,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:14,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:14,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2018-09-30 20:53:14,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:53:14,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:53:14,658 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:14,658 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 41 states. [2018-09-30 20:53:17,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:17,608 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 20:53:17,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:53:17,608 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 21 [2018-09-30 20:53:17,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:17,609 INFO L225 Difference]: With dead ends: 24 [2018-09-30 20:53:17,609 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:53:17,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:53:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:53:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:53:17,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:53:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 20:53:17,615 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 20:53:17,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:17,615 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 20:53:17,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:53:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 20:53:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:53:17,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:17,616 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-30 20:53:17,616 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:17,617 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:17,617 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-30 20:53:17,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:17,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:17,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:17,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:17,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:18,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:18,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:18,463 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:18,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:18,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:18,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:19,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:19,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-09-30 20:53:19,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:53:19,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:53:19,602 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:19,602 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 43 states. [2018-09-30 20:53:22,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:22,368 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:53:22,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:53:22,369 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 22 [2018-09-30 20:53:22,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:22,370 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:53:22,370 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 20:53:22,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:53:22,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 20:53:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 20:53:22,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:53:22,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 20:53:22,375 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 20:53:22,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:22,375 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 20:53:22,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:53:22,375 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 20:53:22,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:53:22,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:22,376 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-30 20:53:22,376 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:22,376 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:22,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-30 20:53:22,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:22,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:22,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:22,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:22,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:23,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:23,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:23,370 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:23,405 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 20:53:23,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:23,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:24,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:24,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2018-09-30 20:53:24,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:53:24,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:53:24,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:24,769 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 45 states. [2018-09-30 20:53:28,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:28,517 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 20:53:28,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:53:28,520 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 23 [2018-09-30 20:53:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:28,521 INFO L225 Difference]: With dead ends: 26 [2018-09-30 20:53:28,521 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:53:28,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-09-30 20:53:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:53:28,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 20:53:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:53:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 20:53:28,526 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 20:53:28,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:28,526 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 20:53:28,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:53:28,526 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 20:53:28,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:53:28,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:28,527 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-30 20:53:28,527 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:28,527 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:28,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-30 20:53:28,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:28,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:28,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:28,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:28,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:30,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:30,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:30,344 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:30,368 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:30,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:30,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:31,785 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:31,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:31,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-09-30 20:53:31,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:53:31,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:53:31,807 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:31,808 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 47 states. [2018-09-30 20:53:35,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:35,433 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 20:53:35,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:53:35,434 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 24 [2018-09-30 20:53:35,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:35,434 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:53:35,435 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:53:35,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time [2018-09-30 20:53:35,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:53:35,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 20:53:35,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:53:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 20:53:35,440 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 20:53:35,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:35,440 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 20:53:35,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:53:35,440 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 20:53:35,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 20:53:35,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:35,441 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-30 20:53:35,441 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:35,441 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:35,442 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-30 20:53:35,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:35,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:35,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:35,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:35,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:36,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:36,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:36,662 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:36,696 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 20:53:36,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:36,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:38,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:38,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2018-09-30 20:53:38,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:53:38,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:53:38,451 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:38,451 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 49 states. [2018-09-30 20:53:42,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:42,218 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 20:53:42,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:53:42,219 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 25 [2018-09-30 20:53:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:42,219 INFO L225 Difference]: With dead ends: 28 [2018-09-30 20:53:42,219 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:53:42,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time [2018-09-30 20:53:42,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:53:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:53:42,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:53:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 20:53:42,224 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 20:53:42,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:42,224 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 20:53:42,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:53:42,224 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 20:53:42,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:53:42,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:42,225 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-30 20:53:42,225 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:42,225 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:42,225 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-30 20:53:42,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:42,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:42,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:42,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:42,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:43,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:43,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:43,536 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:53:43,573 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:53:43,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:43,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:45,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:45,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-09-30 20:53:45,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:53:45,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:53:45,246 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:45,247 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 51 states. [2018-09-30 20:53:49,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:49,603 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 20:53:49,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:53:49,604 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 26 [2018-09-30 20:53:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:49,604 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:53:49,604 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 20:53:49,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time [2018-09-30 20:53:49,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 20:53:49,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 20:53:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:53:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 20:53:49,610 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 20:53:49,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:49,611 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 20:53:49,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:53:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 20:53:49,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 20:53:49,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:49,611 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-30 20:53:49,612 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:49,612 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:49,612 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-30 20:53:49,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:49,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:49,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:49,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:49,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:51,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:51,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:51,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:51,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:54,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:54,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2018-09-30 20:53:54,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:53:54,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:53:54,295 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:54,295 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 53 states. [2018-09-30 20:53:59,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:59,179 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 20:53:59,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:53:59,179 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 27 [2018-09-30 20:53:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:59,180 INFO L225 Difference]: With dead ends: 30 [2018-09-30 20:53:59,180 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:53:59,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time [2018-09-30 20:53:59,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:53:59,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 20:53:59,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:53:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 20:53:59,186 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 20:53:59,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:59,186 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 20:53:59,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:53:59,186 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 20:53:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:53:59,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:59,187 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-30 20:53:59,187 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:59,187 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:59,188 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-30 20:53:59,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:59,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:59,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:59,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:59,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:00,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:00,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:00,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:54:00,775 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:54:00,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:00,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:02,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:02,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-09-30 20:54:02,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:54:02,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:54:02,988 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:02,989 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 55 states. [2018-09-30 20:54:08,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:08,839 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 20:54:08,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:54:08,840 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 28 [2018-09-30 20:54:08,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:08,841 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:54:08,841 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 20:54:08,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time [2018-09-30 20:54:08,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 20:54:08,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 20:54:08,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:54:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 20:54:08,846 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 20:54:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:08,846 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 20:54:08,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:54:08,847 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 20:54:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:54:08,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:08,847 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-30 20:54:08,847 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:08,848 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:08,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-30 20:54:08,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:08,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:08,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:08,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:08,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:10,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:10,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:10,647 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:54:10,692 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 20:54:10,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:10,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:13,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:13,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2018-09-30 20:54:13,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 20:54:13,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 20:54:13,019 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:13,019 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 57 states. [2018-09-30 20:54:20,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:20,283 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 20:54:20,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:54:20,283 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 29 [2018-09-30 20:54:20,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:20,284 INFO L225 Difference]: With dead ends: 32 [2018-09-30 20:54:20,284 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:54:20,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time [2018-09-30 20:54:20,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:54:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:54:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:54:20,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 20:54:20,290 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 20:54:20,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:20,290 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 20:54:20,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 20:54:20,291 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 20:54:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:54:20,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:20,291 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-30 20:54:20,291 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:20,291 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:20,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-30 20:54:20,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:20,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:20,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:20,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:20,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:22,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:22,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:22,253 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:54:22,285 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:54:22,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:22,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:25,057 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:25,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-09-30 20:54:25,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:54:25,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:54:25,058 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:25,058 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 59 states. [2018-09-30 20:54:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:31,059 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 20:54:31,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:54:31,060 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 30 [2018-09-30 20:54:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:31,060 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:54:31,061 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:54:31,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time [2018-09-30 20:54:31,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:54:31,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 20:54:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:54:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 20:54:31,070 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 20:54:31,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:31,070 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 20:54:31,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:54:31,070 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 20:54:31,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 20:54:31,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:31,071 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-30 20:54:31,071 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:31,071 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:31,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-30 20:54:31,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:31,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:31,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:31,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:31,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:31,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:33,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:33,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:33,200 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:54:33,249 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 20:54:33,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:33,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:36,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:36,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 59 [2018-09-30 20:54:36,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 20:54:36,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 20:54:36,180 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:36,180 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 61 states. [2018-09-30 20:54:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:43,448 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 20:54:43,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:54:43,448 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 31 [2018-09-30 20:54:43,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:43,449 INFO L225 Difference]: With dead ends: 34 [2018-09-30 20:54:43,449 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:54:43,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time [2018-09-30 20:54:43,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:54:43,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 20:54:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 20:54:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 20:54:43,454 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 20:54:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:43,455 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 20:54:43,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 20:54:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 20:54:43,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:54:43,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:43,455 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-30 20:54:43,456 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:43,456 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:43,456 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-30 20:54:43,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:43,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:43,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:43,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:43,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:46,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:46,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:46,382 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:54:46,442 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 20:54:46,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:46,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:49,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:49,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-09-30 20:54:49,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 20:54:49,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 20:54:49,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:49,679 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 63 states. [2018-09-30 20:54:59,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:59,518 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 20:54:59,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:54:59,519 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 32 [2018-09-30 20:54:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:59,520 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:54:59,520 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:54:59,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s Time [2018-09-30 20:54:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:54:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 20:54:59,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:54:59,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 20:54:59,524 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 20:54:59,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:59,524 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 20:54:59,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 20:54:59,525 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 20:54:59,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:54:59,525 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:59,525 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-30 20:54:59,526 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:59,526 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:59,526 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-30 20:54:59,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:59,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:59,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:59,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:59,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:01,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:01,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:02,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:55:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:02,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:05,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:05,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-09-30 20:55:05,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:55:05,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:55:05,905 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:05,906 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 65 states. [2018-09-30 20:55:14,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:14,359 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 20:55:14,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:55:14,360 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 33 [2018-09-30 20:55:14,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:14,361 INFO L225 Difference]: With dead ends: 36 [2018-09-30 20:55:14,361 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:55:14,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s Time [2018-09-30 20:55:14,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:55:14,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:55:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:55:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 20:55:14,366 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 20:55:14,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:14,366 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 20:55:14,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:55:14,366 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 20:55:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:55:14,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:14,367 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-30 20:55:14,367 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:14,367 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:14,367 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-30 20:55:14,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:14,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:14,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:14,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:55:14,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:17,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:17,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:17,216 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:55:17,261 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:55:17,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:17,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:20,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:20,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-09-30 20:55:20,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 20:55:20,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 20:55:20,953 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:20,953 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 67 states. [2018-09-30 20:55:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:30,403 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 20:55:30,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:55:30,403 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 34 [2018-09-30 20:55:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:30,404 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:55:30,404 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 20:55:30,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2s Time [2018-09-30 20:55:30,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 20:55:30,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 20:55:30,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 20:55:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 20:55:30,410 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 20:55:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:30,410 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 20:55:30,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 20:55:30,411 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 20:55:30,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 20:55:30,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:30,411 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-30 20:55:30,411 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:30,411 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:30,412 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-30 20:55:30,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:30,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:30,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:30,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:30,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:33,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:33,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:33,379 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:55:33,453 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 20:55:33,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:33,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:37,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:37,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 67 [2018-09-30 20:55:37,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 20:55:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 20:55:37,089 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:37,089 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 69 states. [2018-09-30 20:55:48,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:48,046 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 20:55:48,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:55:48,046 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 35 [2018-09-30 20:55:48,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:48,047 INFO L225 Difference]: With dead ends: 38 [2018-09-30 20:55:48,047 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:55:48,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s Time [2018-09-30 20:55:48,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:55:48,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 20:55:48,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 20:55:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 20:55:48,052 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 20:55:48,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:48,053 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 20:55:48,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 20:55:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 20:55:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 20:55:48,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:48,053 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-30 20:55:48,053 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:48,054 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:48,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-30 20:55:48,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:48,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:48,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:48,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:48,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:51,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:51,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:51,204 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:55:51,254 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:55:51,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:51,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:55,545 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:55,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-09-30 20:55:55,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:55:55,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:55:55,546 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:55,546 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 71 states. [2018-09-30 20:56:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:56:06,055 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 20:56:06,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:56:06,055 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 36 [2018-09-30 20:56:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:56:06,056 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:56:06,056 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 20:56:06,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s Time [2018-09-30 20:56:06,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 20:56:06,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 20:56:06,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 20:56:06,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 20:56:06,061 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 20:56:06,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:56:06,061 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 20:56:06,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:56:06,061 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 20:56:06,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 20:56:06,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:56:06,062 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-30 20:56:06,062 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:56:06,062 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:56:06,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-30 20:56:06,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:56:06,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:56:06,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:06,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:56:06,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:56:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:09,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:56:09,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:56:09,570 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:56:09,646 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 20:56:09,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:56:09,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:56:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:14,138 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:56:14,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2018-09-30 20:56:14,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 20:56:14,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 20:56:14,139 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:56:14,139 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 73 states. [2018-09-30 20:56:24,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:56:24,910 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 20:56:24,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:56:24,910 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 37 [2018-09-30 20:56:24,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:56:24,911 INFO L225 Difference]: With dead ends: 40 [2018-09-30 20:56:24,911 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:56:24,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6s Time [2018-09-30 20:56:24,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:56:24,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 20:56:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 20:56:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 20:56:24,916 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 20:56:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:56:24,916 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 20:56:24,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 20:56:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 20:56:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:56:24,917 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:56:24,917 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-30 20:56:24,917 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:56:24,917 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:56:24,917 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-30 20:56:24,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:56:24,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:56:24,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:24,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:56:24,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:56:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:28,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:56:28,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:56:28,672 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:56:28,738 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:56:28,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:56:28,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:56:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:33,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:56:33,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-09-30 20:56:33,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 20:56:33,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 20:56:33,421 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:56:33,421 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 75 states. [2018-09-30 20:56:44,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:56:44,821 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 20:56:44,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:56:44,822 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 38 [2018-09-30 20:56:44,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:56:44,822 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:56:44,822 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 20:56:44,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1s Time [2018-09-30 20:56:44,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 20:56:44,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 20:56:44,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 20:56:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 20:56:44,827 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 20:56:44,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:56:44,827 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 20:56:44,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 20:56:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 20:56:44,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 20:56:44,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:56:44,828 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-30 20:56:44,828 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:56:44,828 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:56:44,828 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-30 20:56:44,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:56:44,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:56:44,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:44,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:56:44,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:56:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:48,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:56:48,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:56:48,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:56:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:56:48,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:56:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:54,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:56:54,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 75 [2018-09-30 20:56:54,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:56:54,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:56:54,433 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:56:54,433 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 77 states. Received shutdown request... [2018-09-30 20:57:01,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:57:01,688 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:57:01,693 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:57:01,694 INFO L202 PluginConnector]: Adding new model GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:57:01 BoogieIcfgContainer [2018-09-30 20:57:01,694 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:57:01,694 INFO L168 Benchmark]: Toolchain (without parser) took 265457.11 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 52.4 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 67.7 MB). Peak memory consumption was 120.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:57:01,696 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:57:01,696 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.77 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:57:01,697 INFO L168 Benchmark]: Boogie Preprocessor took 24.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:57:01,698 INFO L168 Benchmark]: RCFGBuilder took 212.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:57:01,698 INFO L168 Benchmark]: TraceAbstraction took 265168.90 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 52.4 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 46.6 MB). Peak memory consumption was 99.0 MB. Max. memory is 7.1 GB. [2018-09-30 20:57:01,702 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 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.77 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 212.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 265168.90 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 52.4 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 46.6 MB). Peak memory consumption was 99.0 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 constructing difference of abstraction (40states) and FLOYD_HOARE automaton (currently 27 states, 77 states before enhancement), while ReachableStatesComputation was computing reachable states (25 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 265.0s OverallTime, 38 OverallIterations, 37 TraceHistogramMax, 149.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 76 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 22268 SolverSat, 703 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 73.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1481 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1444 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 108.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=37, 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: 0.1s AutomataMinimizationTime, 37 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 111.4s InterpolantComputationTime, 1556 NumberOfCodeBlocks, 1556 NumberOfCodeBlocksAsserted, 264 NumberOfCheckSat, 1481 ConstructedInterpolants, 0 QuantifiedInterpolants, 367043 SizeOfPredicates, 37 NumberOfNonLiveVariables, 3071 ConjunctsInSsa, 1517 ConjunctsInUnsatCore, 75 InterpolantComputations, 1 PerfectInterpolantSequences, 0/18278 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_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-57-01-713.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/GeometricalCake.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-57-01-713.csv Completed graceful shutdown